Difference between disruptive mood dysregulation and intermittent explosive disorder keep it short online mcq wise imp points
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Here's the MCQ-focused comparison between DMDD and IED:
DMDD vs. IED — High-Yield MCQ Points
(Source: Kaplan & Sadock's Synopsis of Psychiatry)
🔑 Quick Identity
| Feature | DMDD | IED |
|---|---|---|
| DSM-5 category | Depressive Disorders | Disruptive, Impulse-Control & Conduct Disorders |
| Age of onset | Symptoms begin before age 10; diagnosed between 6–18 years | Usually late adolescence to early adulthood |
| Core feature | Chronic, persistent irritability + temper outbursts | Episodic explosive outbursts (impulsive aggression) |
| Mood between episodes | Persistently irritable/angry (observable by others) | Normal between episodes |
| Episode pattern | Chronic, nonepisodic | Episodic (discrete episodes) |
| Frequency | Outbursts ≥ 3×/week | Type A: ≥2×/week for 3 months (non-damaging); Type B: ≥3 damaging episodes/year |
| Duration required | ≥ 12 months (no symptom-free gap >3 months) | 3 months (Type A) or 1 year (Type B) |
| Settings | Must occur in ≥2 settings (e.g., home + school) | Not required in multiple settings |
| Age limit | NOT diagnosed <6 or >18 years | No upper age limit; NOT diagnosed <6 years |
🚫 Key Exclusions (MCQ Trap)
- DMDD cannot co-occur with: ODD, IED, or Bipolar Disorder (bipolar takes precedence)
- IED exclusions: Not diagnosed if aggression is better explained by another disorder (antisocial PD, borderline PD, psychosis, conduct disorder, ADHD)
🧠 Pathophysiology Clue
- DMDD → chronic irritability → tracks toward depression/anxiety in adulthood (NOT bipolar)
- IED → impulse-control failure → associated with serotonergic dysfunction, childhood physical abuse
👤 Epidemiology
- DMDD → more common in boys, prepubertal children
- IED → more common in men, onset in teens/young adults
💊 Treatment
- DMDD: SSRIs + stimulants (if ADHD comorbid); CBT; sodium valproate studied
- IED: SSRIs (fluoxetine has best evidence), mood stabilizers (valproate, lithium), CBT
⭐ Classic MCQ Distinguishers
- Persistent irritable mood between outbursts → DMDD (not IED)
- Episodic outbursts, normal mood between → IED
- Only childhood diagnosis (6–18 years) → DMDD
- Classified under impulse-control disorders → IED
- Future risk = depression/anxiety (not bipolar) → DMDD
- Cannot be diagnosed alongside DMDD → IED (they are mutually exclusive per DSM-5)
- Outbursts ≥3×/week for ≥12 months → DMDD
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