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Family Planning and Contraceptive Methods

PSM Exam Preparation - 20 Marks

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INTRODUCTION

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CLASSIFICATION OF CONTRACEPTIVE METHODS

CONTRACEPTIVE METHODS
├── I. SPACING METHODS
│   ├── 1. Barrier Methods
│   │   ├── (a) Physical methods
│   │   ├── (b) Chemical methods
│   │   └── (c) Combined methods
│   ├── 2. Intra-uterine Devices (IUDs)
│   ├── 3. Hormonal Methods
│   ├── 4. Post-conceptional Methods
│   └── 5. Miscellaneous (Natural methods)
│
└── II. TERMINAL METHODS
    ├── 1. Male Sterilization (Vasectomy)
    └── 2. Female Sterilization (Tubectomy)

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I. SPACING METHODS

A. BARRIER METHODS

• Contraceptive advantage: Absence of side-effects of pill/IUD
• Non-contraceptive advantage: Protection from STDs, reduction in PID incidence, possible protection from cervical cancer

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1. CONDOM (Male)

• Trade name in India: NIRODH (Sanskrit = "prevention")
• Fitted on the erect penis before intercourse; air expelled from the teat end
• A new condom used for each sexual act
• Failure rate: 2-3 per 100 woman-years (perfect use) to >14 (typical use)
• Effectiveness increased by using with spermicidal jelly

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2. DIAPHRAGM (Female)

• A dome-shaped, soft rubber cap inserted into the vagina to cover the cervix
• Must be inserted before intercourse and left in place for at least 6 hours afterward
• Always used with a spermicidal cream or jelly
• Failure rate: 2-3 per 100 woman-years (careful use); 10-20 in typical use
• Advantages: No systemic effects, female-controlled, reusable
• Disadvantages: Requires fitting by a physician, needs correct insertion technique, can cause UTI

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3. CERVICAL CAP

• Smaller than the diaphragm; fits directly over the cervix
• Can be left in place for 24-48 hours
• Used with spermicidal cream
• Must be fitted by a trained provider

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4. FEMALE CONDOM

• A polyurethane sheath inserted into the vagina
• Can be inserted hours before intercourse
• Female-controlled; also protects against STDs

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5. CHEMICAL METHODS (Spermicides)

• Act by killing or immobilizing sperms
• Available as creams, jellies, foams, tablets, foaming tablets, suppositories
• Nonoxynol-9 is the most common spermicide
• Must be inserted into the vagina before coitus; active for ~1 hour
• Best used in combination with a barrier method
• Failure rate alone: ~20-25 per 100 woman-years

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B. INTRA-UTERINE DEVICES (IUDs)

Types of IUDs

• In India under the National Family Welfare Programme: Cu-T-200B was used; Cu-T-380A introduced from 2002

Mechanism of Action of Copper IUDs

1. Spermicidal effect - copper ions are toxic to sperms
2. Inhibition of fertilization - changes in tubal motility
3. Endometrial effect - creates hostile environment; prevents implantation
4. May also alter cervical mucus

Effectiveness of IUDs (First Year, Parous Women)

Duration of Use

• Cu-T-380A: approved for 10 years (shown effective for 12 years)
• Cu-T-200: 4 years
• Progesterone IUD: replaced annually (reservoir depleted in 12-18 months)
• LNG-IUS (Mirena): at least 7 years

Timing of Insertion

• Within 10 days of onset of menstrual period (ideal: within 2 days)
• Postpartum: after 6 weeks (48 hours postpartum is also acceptable - immediate postpartum)
• Post-abortion: immediately or within 1 week

Contraindications to IUD

• Pregnancy
• Active pelvic infection / PID
• Uterine abnormalities (fibroids, bicornuate uterus)
• Undiagnosed abnormal uterine bleeding
• Genital malignancy
• Copper allergy (for copper IUDs)

Side-effects of IUD

• Bleeding: most common - increased menstrual flow, intermenstrual spotting
• Pain: dysmenorrhoea, pelvic cramps
• Expulsion: 5-20% in first year
• Pelvic Infection / PID: risk increased especially in the first 20 days post-insertion; risk of actinomycosis with prolonged use
• Ectopic pregnancy: IUD does not prevent ectopic pregnancy (relative risk increased)
• Perforation of uterus (rare, ~1 per 1000 insertions)
• Missing threads: check for expulsion, pregnancy, or perforation

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C. HORMONAL METHODS

1. Combined Oral Contraceptive Pill (COC)

1. Inhibition of ovulation (primary mechanism) - suppresses LH surge via negative feedback on hypothalamus-pituitary axis
2. Cervical mucus - becomes thick, hostile to sperm penetration
3. Endometrial changes - prevents implantation (atrophic endometrium)
4. Tubal motility - altered

• Monophasic: same dose of both hormones throughout the cycle
• Biphasic: estrogen dose same, progestogen increases after day 10
• Triphasic: doses change in 3 phases mimicking natural cycle; lowest total hormone dose

• Reduces dysmenorrhoea and PMS
• Reduces risk of ovarian and endometrial cancer
• Treats acne, hirsutism (anti-androgenic pills)
• Reduces PID risk; protects against benign breast disease
• Reduces risk of ectopic pregnancy

• Nausea, weight gain, breast tenderness, breakthrough bleeding
• Cardiovascular: hypertension, increased risk of DVT/PE (estrogen effect), stroke
• Reduced libido
• Cholestasis; gallstones

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2. Progestogen-Only Pill (POP / Mini-pill)

• Contains only progestogen; no estrogen
• Taken continuously (no pill-free interval)
• Mechanism: thickens cervical mucus (primary), may inhibit ovulation
• Used in: Breastfeeding mothers (doesn't affect milk), women with contraindications to estrogen
• Less effective than COC; higher failure rate ~1-3 per 100 WY
• Side-effects: irregular bleeding, amenorrhoea

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3. Injectable Contraceptives

• DMPA (Depot Medroxyprogesterone Acetate / Depo-Provera): 150 mg IM every 3 months
• NET-EN (Norethisterone Enanthate): 200 mg IM every 2 months
• Mechanism: inhibits ovulation, thickens cervical mucus
• Efficacy: 0.3 per 100 WY - very effective
• Advantages: long-acting, no daily compliance needed, coitus-independent, safe in breastfeeding
• Disadvantages: menstrual irregularities, weight gain, delayed return of fertility (up to 12-18 months for DMPA), not immediately reversible, requires clinic visit for injection

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4. Implants

• Norplant: 6 silastic capsules containing levonorgestrel implanted subdermally in the upper arm; effective for 5 years
• Implanon/Nexplanon: Single rod, etonogestrel; effective 3 years
• Most effective reversible method available
• Disadvantages: Irregular bleeding, requires trained provider for insertion/removal, expensive

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5. Hormonal IUD (LNG-IUS / Mirena)

• Releases 20 µg levonorgestrel/day locally
• Failure rate: 0.2 per 100 WY (most effective IUD)
• Effective for 5-7 years
• Also used therapeutically for menorrhagia, endometriosis

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6. Emergency Contraception (EC)

• Levonorgestrel (Plan B / i-pill): 1.5 mg single dose or 0.75 mg x 2 doses 12 hours apart - within 72 hours of unprotected intercourse (efficacy up to 120 hours but decreases)
• Ulipristal acetate (ella): within 120 hours
• Combined pill (Yuzpe method): 2 doses of high-dose COC 12 hours apart within 72 hours
• Copper IUD: inserted within 5 days; most effective EC (~99%)
• Mechanism: delays/inhibits ovulation; does NOT terminate established pregnancy

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D. NATURAL (MISCELLANEOUS) METHODS

1. Rhythm / Calendar Method (Ogino-Knaus Method)

• Abstinence during fertile period
• Fertile period: day of ovulation (14 days before next period) ± 3-4 days
• Formula: Shortest cycle - 18 = first unsafe day; Longest cycle - 11 = last unsafe day
• Failure rate: 14-47 per 100 WY (high - depends on regularity)

2. Basal Body Temperature (BBT) Method

• Temperature drops slightly before ovulation, then rises by 0.2-0.5°C after ovulation (progesterone effect)
• Abstinence from menstruation until 3 consecutive days of elevated temperature
• Identifies post-ovulatory infertile period only

3. Billings / Cervical Mucus Method (Ovulation Method)

• Monitors cervical mucus changes
• Pre-ovulatory: mucus is clear, slippery, stretchy (spinnbarkeit/egg-white mucus = fertile)
• Post-ovulatory: mucus becomes thick, opaque, scanty (infertile)

4. Symptothermal Method

• Combines BBT + cervical mucus + calendar - most effective natural method

5. Lactational Amenorrhoea Method (LAM)

• Breastfeeding suppresses GnRH via raised prolactin → anovulation
• Effective if ALL 3 criteria met: (BELLAGIO CRITERIA)
  1. Baby is <6 months old
  2. Mother is fully/exclusively breastfeeding (no supplemental feeds)
  3. Mother is amenorrhoeic (no menstrual return)
• When all 3 met: failure rate < 2 per 100 WY

6. Coitus Interruptus (Withdrawal)

• Withdrawal of penis before ejaculation
• Failure rate: 15-20 per 100 WY (pre-ejaculatory fluid may contain sperm)

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II. TERMINAL METHODS (Sterilization)

A. MALE STERILIZATION (Vasectomy)

• Surgical division/ligation of the vas deferens under local anaesthesia
• Done as an outpatient/day-care procedure
• No scalpel vasectomy (NSV): newer technique using a small puncture - safer, quicker, less complications, no suture needed

1. NOT immediately sterile - at least 30 ejaculations needed before semen examination is negative
2. Use contraceptives until aspermia is confirmed
3. Avoid bath for 24 hours; keep site clean and dry
4. Wear T-bandage/scrotal support (langot) for 15 days
5. Avoid cycling or lifting heavy weights for 15 days
6. Stitches removed on 5th post-op day

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B. FEMALE STERILIZATION (Tubectomy)

Methods:

• Instrument introduced via small abdominal incision; abdomen inflated with CO₂/N₂O/air
• Fallopian tubes occluded using Falope rings or clips
• Short operating time, smaller scar, shorter hospital stay
• Not recommended for postpartum patients for 6 weeks after delivery (CAN be done concurrent with MTP)
• Haemoglobin must be ≥ 8 g/dL; no associated medical disorders

• Small suprapubic incision (~2-3 cm); tubes identified and ligated
• Simple, low-cost, performed under local/spinal anaesthesia
• Most suitable for: postpartum sterilization within 7 days of delivery

• Pomeroy method (most common): loop of tube tied with absorbable suture and excised
• Fimbriectomy: removal of fimbriated end (highest failure if partial)
• Falope ring / Filshie clip (laparoscopic)
• Hulka-Clemens clip

• Interval: any time during menstrual cycle (early better)
• Postpartum: within 7 days (mini-lap) or after 6 weeks (laparoscopy)
• Concurrent with caesarean section or MTP

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III. EVALUATION OF CONTRACEPTIVE METHODS

Pearl Index (Pearl Pregnancy Rate)

Pearl Index = (Total accidental pregnancies / Total months of exposure) × 1200

• The factor 1200 = number of months in 100 years
• Total accidental pregnancies in numerator = every known conception (live births + still births + abortions)
• Deduct 10 months for full-term pregnancy and 4 months for abortion from total exposure period
• A minimum of 600 months of exposure needed before firm conclusion

Life-Table Analysis

• Calculates failure rate for each month of use
• Cumulative failure rate compares methods at any specific length of exposure
• Women leaving the study for reasons other than unintended pregnancy are removed from analysis

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COMPARATIVE FAILURE RATES (Pearl Index Summary)

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HIGH-YIELD EXAM POINTS (20-Mark Focus)

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KEY DEFINITIONS TO MEMORIZE

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Antenatal Care (ANC)

PSM Exam Preparation - 20 Marks | With Mnemonics

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DEFINITION

1. Risk identification
2. Prevention and management of pregnancy-related or concurrent diseases
3. Health education and health promotion

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OBJECTIVES OF ANC

🧠 Mnemonic: "PRFR ATIM" (Pregnant Requires Focused Routine Attention To Improve Motherhood)

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ANTENATAL VISITS - SCHEDULE

Ideal Schedule:

• 1st to 7th month: Once a month
• 8th month: Twice a month
• 9th month onwards: Once a week

Minimum 4-Visit Schedule (WHO / India's NHP):

🧠 Mnemonic: "12 – 26 – 34 – TERM"

"Register her early, check her often" - Early registration = within first trimester (before 12 weeks)

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COMPONENTS OF ANC (The "3H + WAIT" Package)

🧠 Mnemonic: "HEAL the BITE"

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1. HISTORY TAKING

• LMP (Last Menstrual Period) → calculate Expected Date of Delivery (EDD)
• EDD formula (Nagele's rule): LMP + 9 months + 7 days (or LMP - 3 months + 7 days)
• Obstetric history: parity, past abortions, previous CS, instrumental deliveries
• Medical history: diabetes, hypertension, cardiac disease, TB, malaria, HIV
• Family history: twins, hypertension, diabetes

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2. PHYSICAL EXAMINATION

General Examination:

Abdominal Examination:

🧠 Mnemonic for Abdominal Palpation - "FLiPPE":

• F - Fundal height
• L - Lie (longitudinal / transverse / oblique)
• P - Presentation (cephalic / breech)
• P - Position (Lateral - LOA/ROA)
• E - Engagement (head: fifths palpable)

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3. LABORATORY INVESTIGATIONS

🧠 Mnemonic: "HURB STV" (At Sub-Centre + PHC)

At Sub-Centre (SC):

At PHC/CHC/FRU:

At every visit: Hb estimation + Urine albumin/sugar + BP + Weight + Abdominal examination

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4. NUTRITIONAL SUPPLEMENTATION

🧠 Mnemonic: "IFA - Iron Folic Acid = Important For Anemia"

Iron and Folic Acid (IFA) Supplementation:

Calcium Supplementation:

• 500 mg elemental calcium twice daily from 20 weeks
• Prevents pre-eclampsia and eclampsia

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5. TETANUS TOXOID (TT) IMMUNIZATION

🧠 Mnemonic: "TT at 16 and 20 = Two T's, Two Times"

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6. HIGH-RISK PREGNANCY (Risk Approach)

🧠 Mnemonic: "ESMAP + 3 Olds PAST"

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7. ANAEMIA IN PREGNANCY

🧠 Mnemonic for Grading: "NHS + S" (Normal-Healthy Starts Suffering)

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8. HEALTH EDUCATION AND COUNSELLING

🧠 Mnemonic: "DRIB SAFE"

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9. DANGER SIGNS IN PREGNANCY

🧠 Mnemonic: "SHE BLEED"

Any danger sign = IMMEDIATE REFERRAL

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10. GOVERNMENT SCHEMES UNDER ANC

🧠 Mnemonic: "JSY JSSK PMSMA"

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11. COMPLETE ANC PACKAGE (Under NHP/NRHM)

Essential Services:

1. Early registration - within first trimester (before 12 weeks)
2. Minimum 4 ANC visits as per schedule
3. Weight, BP, Hb, urine albumin/sugar at every visit
4. IFA from 12 weeks; Folic acid from peri-conception
5. TT immunization (TT1 + TT2 / Booster)
6. Abdominal examination for fetal growth and presentation
7. Recording tobacco use by all antenatal mothers
8. Name-based tracking of all pregnant women
9. Identification and management of high-risk pregnancies
10. Malaria prophylaxis in endemic zones
11. Counselling on nutrition, rest, birth preparedness, family planning, institutional delivery
12. Identify RTI/STI, HIV, Hepatitis B - provide counselling + referral
13. JSSK / JSY information
14. Name-based tracking of missed and left-out ANC cases

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SUMMARY TABLE: HIGH-YIELD NUMBERS FOR ANC

🧠 Mnemonic: "4 visits, 12-26-34-Term, 180 IFA, 140 short, 11 anaemia"

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POSTNATAL CARE (PNC) - Brief (related to ANC continuum)

• Early breastfeeding within 1 hour of birth
• Exclusive breastfeeding for 6 months
• Newborn care: warmth, cord care, eye care, immunization

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EXAM WRITING FORMAT FOR 20 MARKS

1. Definition (2 marks)
2. Objectives - list all 8 with mnemonic (3 marks)
3. ANC Visit Schedule - 4-visit schedule with timing (2 marks)
4. Components of each visit - History, Examination, Investigations, Interventions (5 marks)

• Examinations (general + obstetric)
• Lab investigations (SC level + PHC level)
• IFA supplementation schedule
• TT immunization schedule

1. High-Risk Approach - list all risk factors (3 marks)
2. Health Education / Danger Signs (2 marks)
3. Government Schemes - JSY, JSSK, PMSMA (2 marks)
4. Conclusion - 1-2 lines on importance of ANC (1 mark)

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QUICK-RECALL MNEMONICS SUMMARY

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Pro exam tip: In PSM exams, drawing the 4-visit ANC schedule as a timeline diagram and the high-risk features as a box consistently earns extra marks. Mentioning PMSMA (9th of every month), JSY, and JSSK shows awareness of current national programmes - examiners love this. Danger signs with the mnemonic "SHE BLEED" is a guaranteed scoring point if asked as a sub-question.

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Tuberculosis - Epidemiology, Prevention and Control

PSM Exam - 20 Marks | Full Answer with Mnemonics

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INTRODUCTION

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PART 1: EPIDEMIOLOGY OF TUBERCULOSIS

🧠 Mnemonic: "AHE = Agent, Host, Environment"

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A. AGENT FACTORS

Causative Organism:

• Mycobacterium tuberculosis (human type) - most common
• Mycobacterium bovis (bovine type) - from cattle; transmitted by consuming unpasteurized milk; causes intestinal TB
• Mycobacterium africanum - rare, found in West Africa

Properties of M. tuberculosis:

🧠 Mnemonic for AFB stain steps: "Fix, Carbol, Steam, Wash, Acid, Wash, Counterstain"

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B. HOST FACTORS

1. Age:

• Can affect all ages
• In India: peak incidence in 15-54 year age group (working adults - most productive years)
• Children: 12% of global TB burden; often miliary/meningeal TB

2. Sex:

• Males > Females (2:1 ratio globally; 56% male in 2019)
• BUT: TB disproportionately affects young females - >50% of female cases before age 34
• TB kills more women in reproductive age than all causes of maternal mortality combined

3. Immunity and Nutrition:

• Malnutrition is the single most important host factor - reduces cell-mediated immunity
• Protein deficiency, vitamin deficiencies increase susceptibility
• Immunosuppression: HIV is the most potent risk factor for progression from TB infection to disease
• Corticosteroid use, diabetes, renal failure, malignancies increase risk

4. Prior Infection / BCG Vaccination:

• Previous BCG vaccination → partial protection (especially against severe forms - miliary, meningeal TB in children)
• Tuberculin test (Mantoux) positivity = evidence of past infection

5. Race / Genetics:

• Certain races (e.g., Africans) show higher susceptibility
• HLA type influences susceptibility

6. Co-morbidities:

🧠 Mnemonic: "DIAMOND" (conditions increasing TB risk)

• HIV = most potent risk factor for TB reactivation
• TB = most common opportunistic infection and cause of death in HIV patients
• TB patients should be offered HIV testing; HIV patients should be screened for TB

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C. ENVIRONMENTAL FACTORS

1. Overcrowding:

• Most important environmental factor
• Overcrowded dwellings, slums, prisons, refugee camps promote TB spread
• Inadequate ventilation → prolonged exposure to droplet nuclei

2. Socio-economic Status:

• TB is primarily a disease of poverty
• Victims: migrant labourers, slum dwellers, residents of backward areas, tribal pockets
• Poor living conditions + malnutrition + shanty housing = triad of TB promotion

3. Urbanization and Migration:

• Rapid urbanization → overcrowding
• Migration mixes infected and uninfected communities rapidly

4. Indoor Air Pollution:

• Smoke from cooking, tobacco - damages respiratory mucosa → increased susceptibility

5. Ventilation and Sunlight:

• Poor ventilation → accumulation of droplet nuclei
• Sunlight (UV) is bactericidal - kills M. tuberculosis

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D. SOURCE OF INFECTION AND TRANSMISSION

Source:

• Sputum-positive (smear-positive) pulmonary TB patient = main source
• One smear-positive case can infect 10-15 persons in a year

Mode of Transmission:

🧠 Mnemonic: "AD-I-C" (Air Droplet Is the Common route)

KEY FACT: Droplet nuclei (1-5 µm diameter) can remain suspended in air for hours and reach alveoli. Large droplets (>5 µm) are filtered out in upper respiratory tract.

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E. INCUBATION PERIOD

• Time from infection to tuberculin test positivity: 3-6 weeks
• Time to development of clinical disease: weeks to months to years (depending on host-parasite relationship)
• Lifetime risk of developing disease from infection: 5-10%
• One-third of global population is asymptomatically infected (latent TB)

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F. NATURAL HISTORY OF TUBERCULOSIS

Exposure to M. tuberculosis
         ↓
PRIMARY INFECTION (Ghon Focus)
         ↓
    90-95%                    5-10%
      ↓                          ↓
LATENT TB               PRIMARY PROGRESSIVE TB
(Dormant bacilli)         (especially in children,
Lifetime risk:             immunocompromised)
5-10% reactivation
         ↓
REACTIVATION (POST-PRIMARY TB)
(Most adult TB = reactivation of latent focus)

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G. PROBLEM STATEMENT

Global:

• 10 million new TB cases in 2019 (slowly declining)
• 1.2 million deaths among HIV-negative people (2019)
• 208,000 additional deaths among HIV-positive people
• 56% male; 32% female; 12% children (<15 years)
• 30 high-burden countries account for 87% of global TB burden

India:

• Highest TB burden country in the world
• India accounts for 17% of global TB incidence (highest single-country contribution)
• Top 5 countries with highest gap between estimated and notified cases: India (17%), Nigeria (11%), Indonesia (10%), Pakistan (8%), Philippines (7%)
• Goal: TB-free India by 2025 (5 years ahead of global SDG target of 2030)

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H. INDICES USED TO MEASURE TB BURDEN

🧠 Mnemonic: "PAINT" (Prevalence, ARTI, Incidence, Notifications, Treatment success)

ARTI is the most sensitive indicator of TB burden in a community. A 1% ARTI means 1 in 100 uninfected persons gets infected per year.

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PART 2: PREVENTION AND CONTROL OF TUBERCULOSIS

"Tuberculosis control means reduction in the prevalence and incidence of disease in the community."

1. Curative component: Case-finding + Treatment (most powerful weapon)
2. Preventive component: BCG vaccination

🧠 Mnemonic: "CATS + B" (Case-finding, Adequate treatment, Treatment adherence, Surveillance + BCG)

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A. CASE FINDING

a. Passive Case Finding:

• Most TB patients (>60%) seek care on their own due to symptoms (cough, fever)
• "Symptomatic case finding" - the most common and productive method
• All patients with cough ≥ 2 weeks = "TB presumptive case" - must be investigated

b. Intensified / Active Case Finding (ICF):

• Provider-initiated activity to detect TB early in targeted/vulnerable groups
• Focuses on: HIV patients, contacts of TB cases, prisoners, migrants, slum dwellers, diabetics, silicosis patients
• Screening tools: symptom screening + sputum microscopy + Chest X-ray + CBNAAT

c. Contact Tracing:

• All household contacts of a sputum-positive case must be examined
• Children under 5 who are contacts → given Isoniazid Preventive Therapy (IPT)

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B. DIAGNOSIS OF TB

🧠 Mnemonic: "SXCM" = Sputum, X-ray, Culture, Molecular

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C. TREATMENT (NTEP - National Tuberculosis Elimination Programme)

• Intensive Phase (IP): Multiple drugs to kill rapidly multiplying bacilli quickly (2-3 months)
• Continuation Phase (CP): Fewer drugs to eliminate dormant/persisting bacilli (4 months)

Standard Treatment Regimens (NTEP/WHO):

🧠 Mnemonic for First-line drugs: "RIPE"

• Streptomycin (S): First anti-TB drug ever; aminoglycoside; ototoxicity (hearing loss), nephrotoxicity

Drug Regimens:

DOTS (Directly Observed Treatment, Short-course): Healthcare worker directly observes patient swallowing every dose. Prevents drug resistance from irregular treatment.

Drug-Resistant TB:

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D. BCG VACCINATION

• BCG = Bacille Calmette-Guérin (attenuated live M. bovis)
• Developed by: Calmette and Guérin (1921) at Institut Pasteur, France
• Given at birth (or as early as possible in first year) - single intradermal dose
• Site: Left upper arm (deltoid region), intradermal
• Dose: 0.05 mL in neonates; 0.1 mL in older children/adults
• Cold chain required: Stored at 2-8°C (freeze-dried vaccine)

Efficacy of BCG:

BCG is most effective against severe disseminated forms of TB in children (miliary + meningeal). It does NOT reliably prevent pulmonary TB reactivation in adults.

BCG and Mantoux:

• BCG vaccination causes Mantoux positivity for up to 5-10 years; does NOT cause lifelong positivity
• A strongly positive Mantoux (≥15 mm) in a BCG-vaccinated child likely represents true infection

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E. ISONIAZID PREVENTIVE THERAPY (IPT)

• INH 5 mg/kg/day (max 300 mg) daily for 6-9 months
• Given to latent TB cases to prevent progression to active disease
• Indications:
  1. HIV-positive individuals (regardless of Mantoux)
  2. Children under 5 years who are household contacts of smear-positive TB cases
  3. Recently tuberculin-converted individuals

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F. HEALTH EDUCATION AND SOCIAL MEASURES

🧠 Mnemonic: "NOVES" (No to poverty; Overcrowding reduction; Ventilation; Education; Sunlight)

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G. NIKSHAY - MANDATORY TB NOTIFICATION

• All TB cases (public + private sector) must be notified on Nikshay portal
• TB is a notifiable disease in India since 2012
• Nikshay = IT platform for TB case management and tracking
• Nikshay Poshan Yojana: Direct benefit transfer of ₹500/month to TB patients for nutritional support

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H. END TB STRATEGY (WHO, 2015-2030)

🧠 Mnemonic: "Zero = 90-95-90"

1. Integrated, patient-centred TB care and prevention
2. Bold policies and supportive systems
3. Intensified research and innovation

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I. NTEP - NATIONAL TUBERCULOSIS ELIMINATION PROGRAMME

• Formerly called RNTCP (Revised National TB Control Programme)
• Renamed NTEP in 2020 to align with elimination goal

🧠 Mnemonic: "PPID + N"

• Free diagnosis and treatment to all
• CBNAAT machines at every district level
• Universal Drug Susceptibility Testing (UDST)
• Management of TB-HIV and TB-Diabetes co-infection
• Engagement of private sector (99DOTS, digital adherence tools)
• Social support: Nikshay Poshan Yojana (₹500/month)

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SUMMARY: HIGH-YIELD NUMBERS

🧠 Mnemonic: "3-10-17-30-10"

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COMPLETE MNEMONICS RECAP

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EXAM WRITING FORMAT (20 Marks)

1. Introduction + Definition (1 mark)
2. Epidemiology - Agent factors - organism, properties, viability (3 marks)
3. Epidemiology - Host factors - age, sex, nutrition, HIV, co-morbidities (3 marks)
4. Epidemiology - Environmental factors - overcrowding, poverty, ventilation (2 marks)
5. Source + Mode of transmission + Incubation period (2 marks)
6. Problem statement - global + India burden (1 mark)
7. Prevention: BCG vaccination - type, efficacy, schedule (2 marks)
8. Prevention: Case finding - passive + active (1 mark)
9. Treatment: DOTS + Drug regimens (2HRZE/4HR) (2 marks)
10. NTEP + Nikshay + End TB strategy (2 marks)
11. Social measures (1 mark)

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Pro exam tip: Drawing the "natural history of TB" flow diagram (exposure → latent → active disease) earns bonus marks. The ARTI definition is a frequent short-answer/MCQ question. Always mention that India contributes 17% of global TB burden and the target of TB-free India by 2025 - it demonstrates awareness of current national goals. The drug table with RIPE side effects is extremely high yield.

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Epidemiology and Its Uses

PSM Exam - 20 Marks | Full Answer with Mnemonics

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INTRODUCTION

"I keep six honest serving men; they taught me all I know. Their names are what, why, when, how, where and who." - Rudyard Kipling

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PART 1: DEFINITION OF EPIDEMIOLOGY

Etymology:

🧠 Mnemonic: "EPI-DEMOS-LOGOS"

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Historical Definitions:

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Most Accepted (Standard) Definitions:

"Epidemiology is the study of the distribution and determinants of health-related states or events in specified populations, and the application of this study to control of health problems."

"Epidemiology is the study of the distribution and determinants of disease frequency in man."

Key exam point: The IEA definition by Last is the most widely used and accepted definition in PSM exams.

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Three Key Components of the Definition:

🧠 Mnemonic: "3 D's of Epidemiology - DDD" (Distribution, Determinants, and application to Disease control)

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PART 2: AIMS OF EPIDEMIOLOGY

According to the International Epidemiological Association (IEA), 3 main aims:

🧠 Mnemonic: "DAP" (Describe, Aetiological factors, Planning)

1. To eliminate or reduce the health problem or its consequences
2. To promote health and well-being of society as a whole

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PART 3: EPIDEMIOLOGY vs. CLINICAL MEDICINE

🧠 Mnemonic: "Pop vs. Patient" (Population vs. Patient)

Classic quote: "Clinicians are interested in cases with the disease; the statistician with the population from which cases are derived; the epidemiologist is interested in the relationship between cases and the population in the form of a rate."

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PART 4: EPIDEMIOLOGICAL APPROACH

🧠 Mnemonic: "Ask and Compare"

• Epidemiology has been defined as "a means of learning or asking questions... and getting answers that lead to further questions"

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PART 5: TYPES/BRANCHES OF EPIDEMIOLOGY

🧠 Mnemonic: "DAE" = Descriptive, Analytical, Experimental

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A. DESCRIPTIVE EPIDEMIOLOGY

🧠 Mnemonic: "TPP" = Time, Place, Person

1. TIME Distribution (When?)

2. PLACE Distribution (Where?)

• Geographic distribution: Urban vs. rural, regional, national, global
• Spot map (John Snow's cholera map - classic example)
• Identifies environmental, cultural, occupational causes

3. PERSON Distribution (Who?)

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B. ANALYTICAL EPIDEMIOLOGY

Study Designs:

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C. EXPERIMENTAL EPIDEMIOLOGY

Types:

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PART 6: USES OF EPIDEMIOLOGY

Morris (1957) identified 7 uses of epidemiology - the classic answer

🧠 Mnemonic: "HEAPS CR" (History Epidemics Announces Public health Strategies, Community Risk)

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🧠 Better Mnemonic: "HiC-PRINS"

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DETAILED EXPLANATION OF EACH USE:

USE 1: Historical Study of Rise and Fall of Disease

• Churchill: "The farther back you look, the farther forward you can see"
• Health and disease patterns are never constant - fluctuate over time
• Epidemiology provides a means to study disease profiles and time trends
• Examples:
  • CHD was found to be an "epidemic" through epidemiological study
  • Later: accidents, cancer, diabetes also found to be "epidemics"
  • Old diseases (smallpox) conquered; new ones (AIDS, SARS, COVID-19) identified through epidemiology
  • Allows projections into the future and identification of emerging health problems

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USE 2: Community Diagnosis

• Epidemiology is described as a "diagnostic tool" of community medicine
• Community diagnosis = identification and quantification of health problems in a community in terms of:
  • Mortality rates and morbidity rates/ratios
  • Identification of their correlates (risk factors)
  • Identification of groups at risk or in need of health care

1. Lays down priorities in disease control and prevention
2. Provides benchmark for later evaluation of health services
3. Source of new knowledge about disease distribution, causation, prevention
4. Extends to understanding social, cultural, environmental characteristics of community

Parallel: As a physician diagnoses an individual patient, the epidemiologist "diagnoses" the health of a community.

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USE 3: Planning and Evaluation of Health Services

• Planning requires knowledge of distribution of health problems over time and place
• Examples of planning using epidemiology:
  • Number of hospital beds required for specific diseases
  • Health manpower planning
  • Planning screening programmes
  • Planning immunization campaigns
  • Provision of sanitary services
  • Research planning

• Is the measure effective in reducing disease frequency?
• What is the cost - vaccine, personnel, storage, transport?
• Are there adverse effects?

The application of epidemiological principles to health care is called the "new epidemiology"

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USE 4: Evaluation of Individual's Risks and Chances

• Epidemiologists calculate absolute risk, relative risk, and attributable risk
• Examples:
  • Risk of bearing a Down syndrome (mongol) child - risk increases dramatically with maternal age (>35 years)
  • Risk of hereditary disorders
  • Smokers vs. non-smokers: risk of lung cancer (RR = 10-20), CHD (RR = 2-3)
  • Risk assessment guides individual counselling

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USE 5: Syndrome Identification and Classification

• Epidemiological investigations define and refine disease syndromes
• Correct misconceptions about syndromes by studying groups
• Examples:
  • Gastric vs. duodenal ulcer: differentiated by the "poverty gradient" seen in gastric ulcer (but not duodenal) - identified epidemiologically in 1920
  • Paterson-Kelly syndrome: association between dysphagia and iron-deficiency anaemia was tested epidemiologically and was NOT confirmed
  • Two main types of essential hypertension - identified by plasma renin epidemiological studies
  • Approximately 3000 paediatric syndromes described; primary defect known in only ~20% - epidemiology helps fill the gaps

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USE 6: Completing the Natural History of Disease

• Picture of disease based on hospital patients is very different from that in the community (Iceberg phenomenon)
• The epidemiologist studies disease patterns in community in relation to agent, host, and environment → better understands the full spectrum of disease
• Hospital studies see only the tip of the iceberg (severe/clinical cases)
• Epidemiology reveals subclinical, mild, and asymptomatic cases

Classic example: Epidemiology revealed that one-third to two-thirds of all deaths due to ischaemic heart disease are sudden (occurring in less than one hour) - this could never have been discovered from hospital studies alone.

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USE 7: Search for Causes (Aetiology) and Risk Factors

• The most well-known and central use of epidemiology
• Identifying causative/risk factors of disease through hypothesis generation and testing
• Examples of classic epidemiological discoveries of aetiology:

🧠 Mnemonic: "Snow Smokes, Doll Dreads, Bradford Believes"

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PART 7: SCOPE OF MODERN EPIDEMIOLOGY

🧠 Mnemonic: "COCNOPS-G"

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PART 8: THE EPIDEMIOLOGICAL TRIAD

🧠 Mnemonic: "AHE on a Web"

        AGENT
         /\
        /  \
       /    \
      / DISEASE\
     /----------\
   HOST -------- ENVIRONMENT

1. Agent - biological, chemical, physical, nutritional
2. Host - age, sex, genetics, immunity, nutrition
3. Environment - physical, biological, social environment

• Agent is virulent enough
• Host is susceptible
• Environment favours transmission

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PART 9: MEASUREMENTS IN EPIDEMIOLOGY

🧠 Mnemonic: "PRIMO"

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SUMMARY TABLE: KEY POINTS FOR EXAM

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QUICK-RECALL MNEMONICS SUMMARY

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EXAM WRITING FORMAT (20 Marks)

1. Etymology + Definition (2 marks) - give 3 historical + IEA definition
2. Three components of definition - frequency, distribution, determinants (3 marks)
3. Aims of epidemiology (IEA - 3 aims) (1 mark)
4. Epidemiology vs. Clinical medicine (2 marks)
5. Types of epidemiology - descriptive, analytical, experimental with examples (3 marks)
6. Descriptive epidemiology - TPP (Time-Place-Person) with examples (2 marks)
7. 7 Uses of epidemiology (Morris) - all 7 explained with examples (5 marks)
8. Epidemiological triad - with diagram (1 mark)
9. Conclusion (1 mark)

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Pro exam tip: The 7 uses of Morris is the most important part - aim to write a paragraph on each use with at least one example per use. The John Snow cholera story (linking cholera to the Broad Street pump in 1854) is the single most famous example in epidemiology and earns marks in almost every use you mention it in. Drawing the epidemiological triad triangle diagram always impresses examiners.

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Nutrition Chapter - Exam Question Predictions

PSM Final Year MBBS (University + USMLE/NExT Level)

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🎯 LONG QUESTIONS (10-20 Marks)

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📝 SHORT QUESTIONS (5 Marks)

Deficiency Diseases:

Assessment and Classification:

Programmes and Policies:

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🔵 MCQ/Very Short Answer Topics (1-2 Marks)

🧠 Must-Know Numbers:

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📊 TOPIC-WISE QUESTION FREQUENCY

HIGH FREQUENCY (guaranteed to appear):
✅ PEM (Kwashiorkor/Marasmus)
✅ Vitamin A deficiency/Xerophthalmia
✅ Iron Deficiency Anaemia
✅ Nutritional assessment methods/classification
✅ National nutrition programmes (ICDS, POSHAN)
✅ Balanced diet / Nutritional requirements

MEDIUM FREQUENCY:
🔶 Iodine deficiency disorders
🔶 Vitamin D deficiency / Rickets
🔶 BMI and obesity
🔶 Fluorosis
🔶 MUAC and growth monitoring

LOWER FREQUENCY (but viva/MCQ important):
🔷 Pellagra, Scurvy, Beriberi
🔷 Zinc, Folate deficiencies
🔷 Breastfeeding and complementary feeding
🔷 Food adulteration / PFA Act
🔷 Essential fatty acids

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🧠 MASTER MNEMONICS TO PREPARE

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📋 MUST-PREPARE LIST (Priority Order)

1. ✅ PEM - Kwashiorkor + Marasmus (most important topic)
2. ✅ Xerophthalmia / Vitamin A deficiency (WHO classification table)
3. ✅ Nutritional assessment - ABCDE methods + Gomez/Waterlow/IAP classifications
4. ✅ Iron Deficiency Anaemia (grading + national programme)
5. ✅ ICDS scheme (most important national programme)
6. ✅ Balanced diet + Nutritional requirements (figures for pregnant, lactating, child)
7. ✅ Iodine deficiency disorders (NIDDCP + iodized salt)
8. ✅ BMI + Obesity (classification + health implications)
9. ✅ POSHAN Abhiyan (national nutrition mission goals)
10. ✅ Breastfeeding (exclusive BF, WHO recommendations, benefits)

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💡 EXAM STRATEGY FOR NUTRITION

• PEM alone can be a 20-mark question - prepare it thoroughly with Gomez, Wellcome, Waterlow classifications and the difference between Kwashiorkor and Marasmus
• National programmes are always asked as part of prevention and control - know ICDS, POSHAN Abhiyan, Vitamin A prophylaxis programme, NIDDCP, and Anaemia Mukt Bharat
• Always mention WHO definitions and cut-offs for deficiencies (examiner-favourite)
• Any deficiency disease question = define → causes → clinical features → grading/classification → prevention + control + national programme
• MUAC is increasingly asked in recent years as a community-level screening tool for SAM/MAM

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Protein Energy Malnutrition (PEM)

PSM Exam - 20 Marks | Full Answer with Mnemonics

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DEFINITION

PEM is the most common nutritional disorder in developing countries and an underlying cause in 30% of deaths among children under 5 years of age.

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EPIDEMIOLOGY / MAGNITUDE OF THE PROBLEM

Global:

• ~27% of children in low-income countries have low height-for-age (stunting)
• ~17% have low weight-for-height (wasting)
• PEM is directly or indirectly responsible for 30-40% of all under-5 deaths

India (NFHS-4):

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AETIOLOGY / CAUSES OF PEM

Primary Cause:

• "Food gap" (inadequate intake of food in quantity AND quality)
• Previously thought to be "protein gap" alone, but now recognized as inadequate overall food intake

The Malnutrition-Infection Vicious Cycle:

🧠 Mnemonic: "Malnutrition Makes Infections More Miserable"

        MALNUTRITION
         ↓          ↑
Reduced immunity → Infections (diarrhoea, ARI,
                    measles, worms)
         ↑          ↓
Reduced absorption, increased requirements,
decreased appetite

Contributing Factors:

🧠 Mnemonic: "PALM-FIBC"

"Malnutrition is self-perpetuating": A malnourished mother → LBW infant → malnourished child → malnourished adult woman → cycle continues across generations.

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CLASSIFICATION OF PEM

🧠 Mnemonic: "Great Wolly Worm Is Alive" = Gomez, Wellcome, Waterlow, IAP, WHO Z-score

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1. GOMEZ CLASSIFICATION (1956) - Weight for Age

🧠 Mnemonic: "Gomez 1-2-3 = 90, 75, 60" (thresholds going DOWN)

Gomez limitation: Does NOT differentiate between oedematous (Kwashiorkor) and non-oedematous malnutrition; cannot distinguish wasting from stunting.

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2. WELLCOME TRUST CLASSIFICATION (1969) - Weight for Age + Oedema

🧠 Mnemonic: "WELLcome = WEight + oeLLedema"

This classification is critical - oedema is the key differentiator between Kwashiorkor and Marasmus.

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3. WATERLOW CLASSIFICATION (1972) - Wasting + Stunting

🧠 Mnemonic: "WATERlow = WAsting + sTuntERing"

• Wasting = acute, current malnutrition (low weight for height)
• Stunting = chronic, past malnutrition (low height for age)
• Wasting + Stunting = chronic malnutrition with acute deterioration

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4. IAP CLASSIFICATION (Indian Academy of Pediatrics) - Weight for Age

Note: IAP revised classification now uses WHO Growth Standards and Z-scores (see below).

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5. WHO Z-SCORE CLASSIFICATION (Current / Modern)

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MUAC (Mid-Upper Arm Circumference) - Field Screening Tool

🧠 Mnemonic: "Red-Yellow-Green = SAM-MAM-Normal"

MUAC can be used from age 1 to 5 years; NOT valid before 1 year.

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CLINICAL FORMS OF PEM

KWASHIORKOR vs. MARASMUS - THE MOST IMPORTANT TABLE

🧠 Mnemonic for Kwashiorkor features: "FACED SHOP"

🧠 Mnemonic for Marasmus: "3 W's - Wasted, Wizened, Wrinkled"

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COMPARISON TABLE: KWASHIORKOR vs. MARASMUS

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MARASMIC KWASHIORKOR (Mixed Form)

• Features of BOTH: weight < 60% expected + oedema present
• Worst prognosis
• = Wellcome classification: weight <60% + oedema

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DIAGNOSIS / EARLY DETECTION

🧠 Mnemonic: "ABCDE" of Nutritional Assessment

"The first indicator of PEM is underweight for age" - best monitored using growth charts (Road to Health chart)

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MANAGEMENT OF SEVERE ACUTE MALNUTRITION (SAM)

WHO 10-Step Management Protocol

🧠 Mnemonic: "TREAT Her with Vitamins, Food, Love, Exercise - Sensibly at Follow-up"

Phases of Management:

RUTF = Ready to Use Therapeutic Food (e.g., Plumpy'Nut - peanut paste + powdered milk + sugar + oil + vitamins). Used for outpatient management of uncomplicated SAM.

NRC = Nutritional Rehabilitation Centre - facility-based management for SAM with medical complications

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PREVENTION AND CONTROL

🧠 Mnemonic: "BESPIN + National Programs" (Breastfeeding, Environment, Supplementation, Prevention of infection, Immunization, Nutrition education)

(a) Health Promotion:

(b) Specific Protection:

(c) Early Diagnosis and Treatment:

• Growth monitoring using Road to Health charts
• MUAC screening at community level
• Early referral to NRCs

(d) Rehabilitation:

• NRCs (Nutritional Rehabilitation Centres)
• RUTF (Ready-to-Use Therapeutic Food)
• Community-based management for uncomplicated SAM

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NATIONAL PROGRAMMES FOR PEM PREVENTION

🧠 Mnemonic: "ICAN-PWM"

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KEY NUMBERS TO REMEMBER

🧠 Mnemonic: "60-80 Kwashiorkor, <60 Marasmus, 1-3 Kwashi age, <1 Marasmus age"

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COMPLETE MNEMONICS RECAP

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EXAM FORMAT FOR 20 MARKS

1. Definition (1 mark)
2. Epidemiology / Magnitude - global + India (NFHS-4 figures) (2 marks)
3. Aetiology - food gap, infection-malnutrition cycle, contributing factors (2 marks)
4. Classification - Gomez, Wellcome, Waterlow, IAP, WHO Z-score, MUAC (5 marks)
5. Clinical features - Kwashiorkor vs. Marasmus comparison table (4 marks)
6. Diagnosis - ABCDE of nutritional assessment (1 mark)
7. Management - WHO 10 steps, NRC, RUTF, phases (2 marks)
8. Prevention and Control - health promotion, specific protection, national programmes (2 marks)
9. Conclusion (1 mark)

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Pro exam tip: The Kwashiorkor vs. Marasmus comparison table written as a neat two-column table gets maximum marks in a short time. The Wellcome classification (the 2x2 box with oedema vs. weight) is a guaranteed examiner-favourite diagram. Always quote NFHS-4 figures for India's malnutrition burden - it shows you know current statistics.

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Balanced Diet

PSM Exam - 20 Marks | Full Answer with Mnemonics

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DEFINITION

1. Maintaining health, vitality and general well-being
2. Making small provision for extra nutrients to withstand short duration of leanness

A balanced diet has become an accepted means to safeguard a population from nutritional deficiencies.

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PRINCIPLES OF CONSTRUCTING A BALANCED DIET

🧠 Mnemonic: "PCM" (Protein first, Carbohydrates later, Micronutrients met)

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NUTRIENTS IN A BALANCED DIET

🧠 Mnemonic: "CPFVMW" = Carbohydrates, Proteins, Fats, Vitamins, Minerals, Water

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1. PROTEINS - "The Building Blocks"

"The word 'protein' by derivation means that which is of first importance."

• Complex organic nitrogenous compounds
• Contain: C, H, O, N (16%), S; sometimes P and Fe
• Constitute ~20% of body weight in adults
• Made up of amino acids (~20 different types)

Essential Amino Acids (EAA) - 9 in total:

🧠 Mnemonic: "PVT TIM HaLL"

Body cannot synthesize essential amino acids → must be obtained from diet. Non-essential amino acids (arginine, glutamic acid, glycine, serine, proline) can be synthesized by the body.

Functions of Protein:

🧠 Mnemonic: "BORSI" (Body Build, Osmotic, Repair, Synthesis, Immunity)

Recommended Protein Intake (ICMR 2020):

Limiting amino acid: The essential amino acid present in the lowest amount in a protein relative to body needs. In cereals = lysine is the limiting amino acid. In pulses = methionine.

Supplementary Action of Proteins:

• Cereals + Pulses = Complete Protein (mutual supplementation)
• Cereals are rich in methionine but poor in lysine; pulses are rich in lysine but poor in methionine
• Combined together (dal + rice / dal + roti) = complementary protein with all EAA
• This is the basis of India's traditional diet

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2. CARBOHYDRATES - "The Energy Fuel"

• Chief source of energy in the diet
• Provide 4 kcal per gram
• Made up of C, H, O (hence "carbohydrate")

Classification:

Functions of Carbohydrates:

🧠 Mnemonic: "SAFE" (Spare protein, Anti-ketogenic, Fuel for brain, Energy)

Dietary Fibre:

• Also called roughage or non-starch polysaccharides
• Not digested by human digestive enzymes but fermented by gut bacteria
• RDA for dietary fibre: 32 g/day (men, sedentary); 25 g/day (women, sedentary) - ICMR 2020

🧠 Mnemonic: "BCDL" (Bowel, Cholesterol, Diabetes, Lowers Cancer risk)

• Prevents constipation (adds bulk to stool)
• Lowers serum cholesterol (prevents CVD)
• Slows glucose absorption → prevents diabetes
• Reduces risk of colorectal cancer
• Gives satiety, helps in weight control

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3. FATS (LIPIDS) - "The Energy Reserve"

• Most concentrated source of energy: 9 kcal per gram
• Made up of fatty acids + glycerol
• Dietary fat recommendation: 15-30% of total energy

Classification of Fatty Acids:

🧠 Mnemonic: "SUM = Saturated, Unsaturated, MUFA"

Essential Fatty Acids (EFA):

• Linoleic acid (Omega-6) and Alpha-linolenic acid (Omega-3) = ESSENTIAL (body cannot synthesize)
• Deficiency → dermatitis, poor growth, impaired wound healing
• Omega-3 sources: fish, flaxseed, walnuts → cardioprotective

Functions of Fats:

🧠 Mnemonic: "CAVEATS"

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4. VITAMINS - "The Protective Nutrients"

Classification:

🧠 Mnemonic: "Fat-soluble ADEK; Water-soluble B+C"

Key Vitamins at a Glance:

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5. MINERALS - "The Inorganic Regulators"

Classification:

Key Minerals:

🧠 Mnemonic: "CAFI-ZINC" (Key minerals to remember)

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6. WATER - "The Universal Solvent"

• Makes up 60-70% of body weight
• Requirement: ~2.5-3 litres/day (through food + drink)
• Functions: solvent, temperature regulation, transport of nutrients, metabolic reactions, excretion

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FOOD GROUPS

🧠 Mnemonic: "GMFVOC" = Go, Meal, Fuel, Veggies, Oils, Construct (or use the table below)

"Go Foods" (energy) = Cereals; "Grow Foods" (protein/build) = Pulses, milk, meat; "Glow Foods" (protective) = Vegetables and fruits

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ENERGY REQUIREMENTS (ICMR 2020)

🧠 Mnemonic: "Men 2110, Women 1660, Preg +350, Lactat +600"

Note: ICMR 2010 gave 2320 kcal for sedentary man; revised DOWN to 2110 in ICMR 2020 - based on actual activity studies in India.

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BALANCED DIET FOR SPECIFIC GROUPS

🧠 Mnemonic: "PLAG" = Pregnant, Lactating, Adolescent, General adult

1. Balanced Diet for an Adult Man (Sedentary):

2. Additional Requirements During Pregnancy:

3. Lactating Mother:

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RECOMMENDED DIETARY ALLOWANCES (RDA) - KEY VALUES (ICMR 2020)

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WHO DIETARY GUIDELINES FOR HEALTHY EATING

🧠 Mnemonic: "RALF SAFE"

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CONCEPT OF FOOD PYRAMID

              ▲ FATS/OILS/SWEETS
             ▲▲ (use sparingly)
            ▲▲▲ MILK / MEAT / FISH / EGGS
           ▲▲▲▲ (2-3 servings)
          ▲▲▲▲▲ VEGETABLES / FRUITS
         ▲▲▲▲▲▲ (3-5 / 2-4 servings)
        ▲▲▲▲▲▲▲ CEREALS / BREAD / RICE / PULSES
       ▲▲▲▲▲▲▲▲ (6-11 servings - BASE)

• Base (largest portion) = Cereals and grains (CHO - energy)
• Middle = Vegetables, fruits (vitamins, minerals, fibre)
• Upper = Protein foods (milk, meat, fish, eggs, pulses)
• Apex (smallest) = Fats, oils, sweets (use sparingly)

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CALORIC VALUE OF NUTRIENTS

🧠 Mnemonic: "4-4-9" (CHO-Protein-Fat)"

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IMPORTANT TERMS

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COMPLETE MNEMONICS RECAP

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EXAM WRITING FORMAT (20 Marks)

1. Definition of balanced diet (1 mark)
2. Principles of constructing a balanced diet - PCM ratios (1 mark)
3. 6 classes of nutrients with brief description of each (8 marks - 1 each + extra for key details):

• Proteins (EAA, functions, RDA, supplementary action)
• Carbohydrates (types, dietary fibre, functions)
• Fats (classification, EFA, functions)
• Vitamins (fat vs. water soluble table)
• Minerals (CAFI-ZINC table)
• Water

1. Food groups - classification table (2 marks)
2. Energy requirements - ICMR 2020 table for different groups (2 marks)
3. RDA table - key values for adult man, woman, pregnant (2 marks)
4. Food pyramid - diagram (1 mark)
5. WHO dietary guidelines (1 mark)
6. Balanced diet for specific groups - pregnancy/lactation (1 mark)
7. Conclusion (1 mark)

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Pro exam tip: Drawing the Food Pyramid diagram and the 4-4-9 caloric table are guaranteed quick marks. The supplementary action of proteins (cereals + pulses = complete protein) is a very commonly asked short-note. Always differentiate fat-soluble (ADEK) vs. water-soluble vitamins (B+C) in a table format - examiners love it. The ICMR 2020 energy values have changed from 2010 - make sure you use the updated figures (2110 for sedentary man, NOT 2320).