Which criterion distinguishes Schizophreniform Disorder from Brief Psychotic Disorder in DSM-5?
- A Presence of negative symptoms
- B Duration of symptoms between 1 month and 6 months ✓
- C Absence of a precipitating stressor
- D Requirement of functional decline
Correct answer: B. Duration of symptoms between 1 month and 6 months
Explanation
In DSM-5, Brief Psychotic Disorder lasts at least 1 day but less than 1 month (with full return to premorbid functioning), while Schizophreniform Disorder requires symptoms lasting more than 1 month but less than 6 months. Schizophrenia requires ≥6 months. Negative symptoms and functional decline are not required for Schizophreniform. Schizophreniform disorder may have specifiers for good prognostic features (acute onset, confusion/perplexity at peak).
Reference: Kaplan & Sadock's Synopsis of Psychiatry, 11th ed.
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