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Prolonged duration of untreated psychosis in nonaffective first-episode psychotic disorders compared to other psychoses.

Introduction. While the consequences of the duration of untreated psychosis (DUP) represent an active area of research, less attention has been focused on the determinants of the DUP. This analysis assessed several potential determinants of the DUP from a practice-based survey. Method. Data on selected patients in their first treatment episode for psychotic symptoms were obtained from 104 practicing physicians. Patients with a long DUP (n=31), defined as >4 weeks, were compared to patients with a short DUP (≤4 weeks, n=28). Results. The long-DUP group had a higher percentage of patients with nonaffective psychotic disorders (58%) compared to the short-DUP group (29%). The median DUP among those with nonaffective psychotic disorders was 8 weeks, compared to 3 weeks among those with other psychotic disorders. The long-DUP group had a higher percentage of patients rated as uncertain about or denying a mental illness (55% compared to 25% in the short-DUP group). The presence of negative symptoms approached significance in terms of differentiating between the two groups, with 66% of the long-DUP group having negative symptoms compared to 39% of the short-DUP group. When three variables (nonaffective psychotic disorder versus other psychoses, insight, and negative symptoms) were entered into a logistic regression model, only diagnostic category remained an independently significant predictor. Conclusion. In this practice-based sample, patients with nonaffective psychotic disorders were more likely to have a longer DUP than patients who developed psychotic symptoms in the context of mood disorders, substance use disorders, or other disorders.

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