Teach me from scratch 2. Relationship of Social & behavioural to health & disease
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Relationship of Social & Behavioural Sciences to Health & Disease
Based on Park's Textbook of Preventive & Social Medicine (the gold standard for this topic), Harrison's Principles, and the NCBI medical curriculum framework.
1. The Core Idea: Why Does This Topic Exist?
"The secret of national health lies in the homes of the people."
For a long time, medicine focused only on biological causes of disease - the "germ theory" model. But over the last century, it became clear that social and economic factors influence health as much as medical interventions. Disease does not occur in a vacuum; it is shaped by how people live, think, work, and relate to each other.
This led to the recognition that social sciences and behavioural sciences are, in effect, the basic sciences of community medicine - just as anatomy and physiology are the basic sciences of clinical medicine.
2. Definitions: Social Sciences vs. Behavioural Sciences
| Term | Definition |
|---|---|
| Social Sciences | Disciplines committed to the scientific examination of human behaviour. Includes economics, political science, sociology, social psychology, and social anthropology. |
| Behavioural Sciences | Applied specifically to the last three: sociology, social psychology, and social anthropology - because they deal directly with human behaviour. |
Key distinction: All behavioural sciences are social sciences, but not all social sciences are behavioural sciences. Economics and political science are social sciences but are not typically called behavioural sciences because they deal with systems and structures, not directly with individual behaviour.
3. The Individual Disciplines and Their Relevance to Health
(a) Economics
- Deals with production, distribution, consumption, and ownership of scarce resources.
- Relevant to health because poverty, income inequality, and resource scarcity directly affect health outcomes.
- Underlies concepts like health financing, health insurance, and the economics of disease burden.
(b) Political Science
- Concerns itself with systems of laws, governance, and institutions.
- Relevant to health because health policy, legislation, and governmental decisions determine what health services are available, funded, and distributed.
(c) Sociology
- Studies human relationships and human behaviour for a better understanding of the pattern of human life.
- Also concerned with how other individuals' thinking and actions affect the individual.
- The unit of study is the group (contrast with psychology, where the unit is the individual).
- Medical Sociology is the specialization within sociology dealing with health, health behaviour, and medical institutions. It views illness as not just a medical problem but also a psychological and social one.
(d) Social Psychology
- Studies the psychology of individuals living in human society or groups.
- Focuses on perception, attitudes, opinions, motivation, and learning in individuals and how these vary across groups.
- In health: explains why people adopt or resist health behaviours (e.g., vaccine hesitancy, health-seeking behaviour).
(e) Anthropology
- From Greek: anthropos (man) + logos (science).
- Branches:
- Physical anthropology - evolution, racial differences, bodily traits
- Social anthropology - development and types of social life
- Cultural anthropology - total way of life of people, their thinking, feeling, and action
- Medical anthropology specifically deals with the cultural component in the ecology of health and disease.
- Explains how cultural beliefs, customs, and taboos affect health behaviour, treatment acceptance, and disease patterns.
4. Key Sociological Definitions (Frequently Examined)
| Term | Definition |
|---|---|
| Society | A group of individuals who have organized themselves and follow a way of life |
| Community | A social group determined by geographical boundaries and/or common values or interests |
| Sociology | Study of individuals and groups in society - both relationships between humans AND human behaviour |
| Socialisation | Process by which an individual gradually acquires culture and becomes a member of a social group |
| Social structure | Patterns of inter-relationships between persons in a society |
| Medical sociology | Studies the medical profession, health behaviour, and medical institutions; views illness as a psycho-social problem |
5. Types of Medicine Defined by Social Orientation
| Type | Definition |
|---|---|
| State medicine | All health services owned and operated by the state |
| Socialized medicine | Health services organized and controlled by the government but operated by professional groups |
| Social medicine | Study of social, economic, environmental, cultural, psychological, and genetic factors that bear on health |
| Social defence | Preventive, therapeutic, and rehabilitative services protecting society from antisocial, criminal, or deviant conduct |
Social medicine is the broadest and most important here - it is the foundation of preventive and community medicine.
6. Social Pathology, Social Psychiatry, and Acculturation
Social Pathology
The study of social problems which cause disease in the population. These include:
- Poverty and unemployment
- Illiteracy and lack of education
- Overcrowding and poor housing
- Malnutrition
- Crime, alcoholism, drug abuse
- Social inequality and discrimination
Social pathology recognizes that the roots of many diseases lie in defects of the social system, not just in biological agents.
Social Psychiatry
The branch dealing with the relationship between mental health and social/cultural factors. It examines how social environments, life events, and cultural norms contribute to the onset, course, and outcome of mental disorders.
Acculturation
The process by which groups or individuals adopt elements of another culture. Relevant to health because:
- Migration and cultural change can disrupt health behaviours
- It occurs through education, industrialization, trade, and commerce
- Can lead to the adoption of new (sometimes harmful) health habits
- Explains changing disease patterns in migrant populations (e.g., rise of non-communicable diseases in groups adopting Western diets)
7. How Social Factors Influence Health - The Pathways
Social and behavioural factors affect health through several mechanisms:
Direct Mechanisms
- Socioeconomic status (SES) - There is a graded, inverse relationship between SES and health: the higher the income and education, the better the health outcomes. This gradient is not limited to extreme poverty.
- Education - Higher education leads to better health literacy, better health decisions, and better access to care.
- Poverty and inequality - Poverty causes malnutrition, inadequate housing, poor sanitation, and limited access to health services.
- Employment and working conditions - Job stress, occupational hazards, and unemployment all affect health. Work-related stress is associated with increased coronary heart disease risk and poorer prognosis.
Behavioural Mechanisms
Harmful behaviours such as:
- Smoking
- Poor diet
- Sedentary lifestyle
- Excessive alcohol consumption
- Risky sexual behaviour
These behaviours are themselves shaped by social conditions (peer norms, marketing, poverty). Psychological, social, and biological factors influence disease risk AND illness recurrence.
Psychological Mechanisms (Mind-Body Interactions)
- Stress activates the HPA (hypothalamic-pituitary-adrenal) axis and sympathetic nervous system
- Chronic psychological stress leads to immune dysregulation, increased inflammation, hypertension
- Social isolation and loneliness independently increase mortality risk
- Social support is protective against disease and improves recovery
Social Determinants Framework (NIMHD Model)
The National Institute on Minority Health and Health Disparities model organizes influences on health across:
- Domains of influence: Biological, behavioural, physical/built environment, sociocultural environment, and healthcare system
- Levels of influence: Individual, interpersonal, community, and societal
These are not mutually exclusive - they interact across the life course.
8. Social Variables with Direct Health Impact
| Social Variable | Health Impact |
|---|---|
| Income/Poverty | Malnutrition, infectious diseases, poor access to care |
| Education | Inversely related to mortality; better health literacy |
| Housing | Overcrowding spreads TB, respiratory infections; damp housing worsens asthma |
| Sanitation | Core driver of diarrhoeal diseases and helminthiasis |
| Occupation | Occupational disease, stress-related illness, exposure to carcinogens |
| Social support | Protective against depression, improves recovery from illness |
| Cultural beliefs | Affect treatment-seeking, acceptance of vaccines, diet choices |
| Race/Ethnicity | Social determinant - linked to disparities in CVD, diabetes, cancer, HIV/AIDS |
9. The Biopsychosocial Model
This is the conceptual framework that integrates all of the above:
Disease = Biological factors + Psychological factors + Social factors
Proposed by George Engel (1977), it replaced the purely biomedical model. It holds that illness cannot be understood or treated by looking at biology alone. The social and physical characteristics of the environment, combined with individual physical and psychological attributes, influence:
- Health behaviours
- Stress-related physiological pathways
- Access to healthcare
This is why a good doctor "treats people, not cases."
10. Sociological Theories of Disease Causation
| Theory | Core Idea | Relevance to Disease |
|---|---|---|
| Marxist theory | Disease is caused by putting profit ahead of health; capitalism creates unhealthy working and living conditions | Explains occupational disease, industrial pollution, poverty-related illness |
| Parsonian theory | The "sick role" - illness is a social role with rights (to be exempt from normal duties) and obligations (to seek treatment) | Explains illness behaviour, medicalization, doctor-patient relationship |
| Feminist theory | Gender inequality affects health; women's health needs are systematically underserved | Explains maternal mortality, domestic violence, reproductive health disparities |
| Foucauldian theory | Medicine as a form of social control; the "medical gaze" defines and regulates bodies and populations | Explains medicalization of normal life events (childbirth, ageing) |
11. Practical Implications for Medicine
- Doctors must look beyond the biological - A patient with tuberculosis may have social factors (overcrowding, malnutrition, poverty) that are more important to address than just the antibiotic regimen.
- Illness behaviour matters - Why does one person with mild symptoms seek care immediately while another with severe symptoms delays? Social and cultural factors explain this.
- Cultural competence - Understanding patients' cultural backgrounds, beliefs, and social contexts improves diagnosis and treatment adherence.
- Health is a human right - The WHO Constitution, the Universal Declaration of Human Rights (1948), and India's Constitution all recognize the right to health. Social medicine operationalizes this right.
- Prevention requires social action - Immunisation, sanitation, nutrition programmes, and health education all depend on social and behavioural science principles.
Summary Table
| Concept | One-Line Summary |
|---|---|
| Social sciences | Economics, political science, sociology, social psychology, social anthropology |
| Behavioural sciences | Sociology, social psychology, social anthropology (directly study behaviour) |
| Medical sociology | Illness as a psycho-social, not just biological, problem |
| Social medicine | All factors (social, economic, cultural, environmental) bearing on health |
| Social pathology | Social problems that cause disease in the population |
| Acculturation | Cultural change affecting health behaviour |
| Biopsychosocial model | Disease = biological + psychological + social factors combined |
| Social determinants | Income, education, housing, employment, race, cultural beliefs |
Primary source: Park's Textbook of Preventive and Social Medicine, Chapter 13 - Harrison's Principles of Internal Medicine, 22nd Ed. - National Academy of Medicine (Improving Medical Education, NCBl NBK10239)
Principles of Health Promotion & education
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Principles of Health Promotion & Health Education
Based primarily on Park's Textbook of Preventive and Social Medicine, supplemented by Harrison's Principles and the Ottawa Charter framework.
PART A: HEALTH EDUCATION
1. What Is Health Education?
Health education brings together the art and science of medicine and the principles and practice of general education. The link between them lies in the social and behavioural sciences - sociology, psychology, and social anthropology.
Health education cannot be "given" to one person by another. It involves teaching, learning, and the inculcation of habits aimed at healthful living. Learning is a two-way process between teacher and taught - the teacher cannot teach unless the pupil wants to learn.
2. Definitions of Health Education
Multiple definitions exist, emphasizing different aspects:
| Source | Definition |
|---|---|
| General definition | The translation of what is known about health into desirable individual and community behaviour patterns by means of an educational process |
| John M. Last | "The process by which individuals and groups of people learn to behave in a manner conducive to the promotion, maintenance or restoration of health" |
| WHO | Any combination of learning opportunities designed to facilitate voluntary adaptations of behaviour that are conducive to health |
| National Conference on Preventive Medicine (USA) | "A process that informs, motivates and helps people to adopt and maintain healthy practices and lifestyles, advocates environmental changes, and conducts professional training and research" |
| Alma-Ata Declaration (1978) | "A process aimed at encouraging people to want to be healthy, to know how to stay healthy, to do what they can individually and collectively to maintain health, and to seek help when needed" |
The Alma-Ata Declaration (1978) was a turning point - it gave a new meaning and direction to health education by emphasizing individual and community participation.
3. Changing Concepts in Health Education
After the Alma-Ata Declaration, the emphasis shifted from:
| Old Emphasis | New Emphasis |
|---|---|
| Prevention of disease | Promotion of healthy lifestyles |
| Modification of individual behaviour | Modification of the social environment in which the individual lives |
| Community participation | Community involvement |
| Dependence on health services | Individual and community self-reliance |
4. Health Education and Behaviour
- The behaviours to be adopted or modified may apply to individuals, groups (families, health professionals, institutions), or the entire community.
- Strategies to influence behaviour will vary depending on the specific disease or health problem, its distribution in the population, and the acceptability of available methods.
- Education alone is insufficient to achieve optimum health - the target population must also have access to proven preventive measures.
5. Four Approaches to Health Education
1. Regulatory (Coercive) Approach
- Government intervention - laws, regulations, prohibition, imprisonment - designed to alter human behaviour.
- Examples: Child Marriage Restraint Act (India), mandatory seat belts (West), vaccination in emergencies.
- Limitations:
- Cause of disease (medical or social) cannot be eradicated by legislation alone
- In areas involving personal choice (diet, smoking, exercise), laws are impractical - they violate individual rights
- A law will fail unless the majority of people are in favour of it
- Classic failure: India's 1976 sterilization campaign, which led to electoral defeat in 1977
- Useful only in emergencies or limited situations (epidemic control, management of fairs/festivals)
- Core lesson: Health education does not force people to change. Coercive approach is a last resort.
2. Service Approach
- Tried in the 1960s through Basic Health Services - aimed at providing all needed health services at people's doorsteps on the assumption they would use them.
- Classic failure: Water-seal latrines provided free in rural India were not used because using latrines was not the community's habit.
- Lesson: People will not accept a programme or service, even if offered free of cost, unless it is based on their felt needs.
3. Health Education Approach
- Many problems (cessation of smoking, use of safe water, fertility control) can only be solved through health education.
- Based on the belief that people, if given correct information, will make rational decisions in their own best interest.
- However: Information alone is not enough. People also need skills, motivation, and a supportive environment to change behaviour.
4. Social Intervention Model
- An effective health education model is based on precise knowledge of human ecology and understanding of the interaction between cultural, biological, physical, and social environmental factors.
- People will not readily accept something new until it has been "legitimated" (approved) by the group to which they belong.
- Adoption of new ideas (e.g., vasectomy, loop insertion) is facilitated by group support.
- Lesson: A coherent strategy must use all available methods. Reliance on only one method leads to failure. A combination of approaches is necessary.
6. Contents of Health Education
Health education covers every aspect of family and community health:
| Area | Focus |
|---|---|
| 1. Human biology | Structure and functions of the body; effects of alcohol, smoking, drugs; reproductive biology; healthy lifestyles |
| 2. Nutrition | Optimum diets; removing food prejudices; breastfeeding; weaning; tackling malnutrition |
| 3. Family health | Maternal and child health; family planning; spacing of children; antenatal care |
| 4. Communicable disease prevention | Immunization; prevention of TB, STIs, HIV/AIDS, diarrhoeal diseases |
| 5. Non-communicable disease prevention | Lifestyle modification for hypertension, diabetes, cancer, CVD |
| 6. Mental health | Managing stress; critical periods (adolescence, marriage, bereavement, widowhood); recognizing breakdown |
| 7. Prevention of accidents | Safety education for home, road, and workplace |
| 8. Use of health services | Informing people what services exist and how to access them (screening, immunization, family planning) |
Since health education has limited impact when directed from the general education system alone, the information must be integrated into the educational system and must have the young population as the principal target.
7. Principles of Health Education (The Core of This Topic)
These are 13 key principles derived from psychology and learning theory:
| # | Principle | Explanation |
|---|---|---|
| 1 | Credibility | The message must be perceived as trustworthy. Good health education is based on facts consistent with scientific knowledge AND local culture. Without trust in the communicator, no action will follow. |
| 2 | Interest | People will not listen to things that are not in their interest. Health teaching must relate to the interests of the people - not abstract slogans like "Take care of your health." |
| 3 | Participation | The process of education must involve the active participation of the individual and community. Passive reception of information does not produce lasting behaviour change. |
| 4 | Motivation | People must be motivated to change. Motivation arises from felt needs, desire for improved health, and confidence that change is possible. |
| 5 | Comprehension | The message must be understood. Language, literacy level, and cultural context must be considered. Simple, clear messages work best. |
| 6 | Reinforcement | Healthy behaviour must be reinforced through repeated exposure to the message and through positive feedback from family, community, and health workers. |
| 7 | Learning by doing | Practical demonstration and "hands-on" experience are more effective than lectures alone. Skills are learned through practice. |
| 8 | Known to unknown | Teaching must proceed from what the person already knows to new information. Building on existing knowledge aids retention and acceptance. |
| 9 | Setting an example | Health workers must themselves practice what they preach. Role-modelling is a powerful educational tool. |
| 10 | Good human relations | Effective health education requires a warm, respectful, and empathetic relationship between educator and recipient. Trust is essential. |
| 11 | Feedback | There must be a two-way flow of communication. The educator must receive feedback to assess understanding and modify the approach accordingly. |
| 12 | Multiple methods | No single method is effective for all people in all situations. A combination of methods (individual counselling, group teaching, mass media) is most effective. |
| 13 | Repetition | Key messages need to be repeated in different ways and at different times to ensure lasting behaviour change. Single exposure is rarely sufficient. |
8. Methods of Health Education
Methods are classified by the size of the audience:
A. Individual Approach (One-to-One)
- Counselling - face-to-face dialogue; most effective method for behaviour change
- Home visits - health worker goes to the patient's home
- Personal letters - written communication tailored to the individual
B. Group Approach
- Lectures (chalk and talk) - useful for groups of up to 30; should not exceed 15-20 minutes
- Demonstrations - practical skill-building (e.g., ORS preparation, condom use)
- Discussion methods: group discussion, panel discussion, symposium, workshop, conferences, seminars, role play
C. Mass Approach
- Television, radio, newspapers
- Printed materials (pamphlets, leaflets, posters)
- Health museums and exhibitions
- Folk methods (street plays, songs, puppets)
- Internet and social media
Comparison of mass media vs. personal communication:
| Mass Media (TV, radio, newspaper) | Personal Communication |
|---|---|
| Reaches the widest population | Uses warmth, understanding, and personal knowledge |
| Gets public attention quickly | Allows questions, expressions of fear, and deeper learning |
| Best for concentrated campaigns (health weeks/months) | Gets people to make changes in personal habits more readily |
| More effective among those with above-average education | More influential with average or below-average education |
PART B: HEALTH PROMOTION
1. Definition
Health promotion is "the process of enabling people to increase control over, and to improve, their health." (Ottawa Charter, 1986)
It is not directed against any particular disease. Instead, it strengthens the host through a variety of approaches. It is broader than health education - it includes environmental, policy, and social changes as well.
Health promotion = Health Education + Environmental Modifications + Nutritional Interventions + Lifestyle & Behavioural Changes
2. Key Landmark Events
| Year | Event | Significance |
|---|---|---|
| 1978 | Alma-Ata Declaration | "Health for All by 2000"; primary health care; community participation |
| 1986 | Ottawa Charter (1st International Conference on Health Promotion) | Defined 5 key action areas of health promotion; created the WHO Health Promotion Logo |
| 1997 | Jakarta Declaration (4th Conference) | Vision for health promotion in the 21st century; poverty identified as the greatest threat to health |
| 2000 | Millennium Development Goals (MDGs) | 8 goals targeting poverty, child mortality, maternal health, infectious diseases by 2015 |
| 2015 | Sustainable Development Goals (SDGs) | 17 goals; 2030 agenda; broader and more ambitious than MDGs |
3. Ottawa Charter - 5 Key Action Areas
The Ottawa Charter (1986) is the foundation of modern health promotion. Its five key action areas are:
| Action Area | What It Means |
|---|---|
| 1. Build healthy public policy | Health must be on the agenda of all policymakers across all sectors (not just health ministries). Policies must support healthy choices - e.g., tobacco taxes, food labelling, seatbelt laws |
| 2. Create supportive environments | Physical and social environments must be health-supporting - safe housing, clean air and water, workplace health, school environments |
| 3. Strengthen community action | Communities must be empowered to participate in health decision-making and to identify and act on their own health priorities |
| 4. Develop personal skills | Health education, life skills, and literacy that enable individuals to make healthy choices throughout their lives |
| 5. Re-orient health services | Health services must move beyond treatment toward prevention, health promotion, and primary care. Role of health professionals extends to advocacy and education |
The WHO Health Promotion Logo is a circle with 3 wings representing 3 basic strategies (advocate, enable, mediate) and encapsulating the 5 action areas.
4. Three Basic Strategies of Health Promotion (Ottawa Charter)
| Strategy | Meaning |
|---|---|
| Advocate | Argue the case for health as a basic human right and political issue |
| Enable | Reduce differences in health status; ensure equal opportunities and resources for all |
| Mediate | Coordinate efforts of government, NGOs, industry, media, and individuals toward health goals |
5. Interventions in Health Promotion
| Intervention | Examples |
|---|---|
| Health education | Most cost-effective intervention; large number of diseases preventable through information and motivation |
| Environmental modifications | Safe water supply; sanitary latrines; vector control; improved housing - often more impactful than vaccines or drugs |
| Nutritional interventions | Food fortification; child feeding programmes; nutrition education; food distribution |
| Lifestyle and behavioural changes | Smoking cessation; physical activity promotion; alcohol reduction; safe sex education |
6. Levels of Prevention (Health Promotion in Context)
| Level | Phase | Aim | Target |
|---|---|---|---|
| Primordial | Underlying social/economic/environmental conditions | Prevent risk factors from emerging | Total population - achieved through public health policy and health promotion |
| Primary | Specific causal factors | Reduce incidence of disease | Total population and high-risk groups - achieved through public health programmes |
| Secondary | Early disease | Reduce prevalence by shortening duration | Individuals with established disease - via early diagnosis and treatment |
| Tertiary | Late disease / rehabilitation | Reduce complications and disability | Patients - via rehabilitation |
Health promotion operates most strongly at the primordial and primary levels.
7. Jakarta Declaration - Priorities for Health Promotion in the 21st Century
The Jakarta Declaration (1997) identified the following fundamental conditions and resources for health:
- Peace, shelter, education, social security, social relations, food, income
- Empowerment of women
- Stable ecosystem, sustainable resource use
- Social justice, respect for human rights, equity
Emerging threats identified by Jakarta Declaration:
- Increased sedentary behaviour
- Antibiotic and drug resistance
- Increased drug abuse
- Civil and domestic violence
- New and re-emerging infectious diseases
- Greater recognition of mental health problems
8. Principles of Health Promotion (WHO/Ottawa)
| Principle | Core Idea |
|---|---|
| Empowerment | Enable people to gain greater control over decisions and actions affecting their health |
| Equity | Health promotion must reduce inequities; all people must have equal opportunities to achieve their full health potential |
| Participation | Communities and individuals must be active partners, not passive recipients |
| Holistic approach | Physical, mental, social, and spiritual health must all be addressed |
| Intersectoral collaboration | Health cannot be achieved by the health sector alone; all sectors (education, agriculture, housing, finance) must collaborate |
| Sustainability | Actions must produce lasting change, not just short-term gains |
| Multiple strategies | No single strategy is sufficient; a combination of education, policy, environment, and community action is needed |
Quick Comparison: Health Education vs. Health Promotion
| Feature | Health Education | Health Promotion |
|---|---|---|
| Scope | Narrower - focuses on knowledge, attitudes, and behaviour | Broader - includes policy, environment, social change |
| Target | Individuals and groups | Individuals, communities, policy makers, society |
| Method | Teaching, learning, communication | Advocacy, community action, legislation, environmental change |
| Goal | Voluntary behaviour change | Enabling people to take control of their health |
| Relationship | A component of health promotion | Broader umbrella that includes health education |
Summary Table: The 13 Principles of Health Education (Exam Favourite)
| Principle | Key Point |
|---|---|
| Credibility | Trust in the message and communicator |
| Interest | Relevance to felt needs |
| Participation | Active involvement, not passive reception |
| Motivation | Felt need must drive change |
| Comprehension | Message must be understood |
| Reinforcement | Repeated exposure and positive feedback |
| Learning by doing | Practical experience over lectures |
| Known to unknown | Build on existing knowledge |
| Setting an example | Role-modelling by health workers |
| Good human relations | Empathy, respect, trust |
| Feedback | Two-way communication |
| Multiple methods | Combination of individual, group, mass methods |
| Repetition | Key messages must be repeated |
Primary source: Park's Textbook of Preventive and Social Medicine, Chapter on Health Education - Ottawa Charter for Health Promotion (1986) - Jakarta Declaration on Health Promotion (1997)
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