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Copolov, Box 1 | The spectrum of psychotic disorders (DSM-IV)2 |
| Duration of disturbance | Identified aetiological factors | Prominence of mood disorder | Non-bizarre delusions only | |
| Schizophrenia |  6 months | - | Not prominent | No |
| Psychotic disorder due to a medical condition | Not specified | + | Not specified | Possible |
| Substance-induced psychotic disorder | Not specified | + | Not specified | Possible |
| Brief psychotic disorder | 1 day - < 1 month | - | Not prominent | Possible |
| Schizophreniform disorder | 1 month - < 6 months | - | Not prominent | No |
| Major depressive disorder with psychotic features | 2 weeks | - | Very prominent (must overlap exclusively with psychosis) | Possible; usually (but not necessarily) mood-congruent |
| Bipolar disorder with psychotic features | 1 week | - | Very prominent (must overlap exclusively with psychosis) | Possible; usually (but not necessarily) mood-congruent |
| Schizoaffective disorder | 1 month | - | Prominent, but there must also be > 2 weeks' psychosis in the absence of major mood disturbance | No |
| Delusional disorder | 1 month | - | Not prominent | Yes |
A further disorder, "Psychotic disorder not otherwise specified", is a psychosis in which the criteria for other psychotic disorders are unmet. |
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