In DSM-5, the diagnosis of Brief Psychotic Disorder requires that the psychotic episode lasts:
- A At least 1 month but less than 6 months
- B Less than 1 week with complete symptom remission
- C At least 1 day but less than 1 month, with eventual full return to premorbid level ✓
- D Exactly 1–6 months with partial recovery
Correct answer: C. At least 1 day but less than 1 month, with eventual full return to premorbid level
Explanation
DSM-5 defines Brief Psychotic Disorder as at least one positive psychotic symptom (delusions, hallucinations, disorganised speech, or grossly disorganised/catatonic behaviour) lasting at least 1 day but less than 1 month, with eventual full return to the premorbid level of functioning. Schizophreniform Disorder spans 1–6 months; Schizophrenia requires ≥6 months duration.
Reference: Kaplan & Sadock's Synopsis of Psychiatry, 11th ed.
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