| Psychotic disorder | Features |
|---|---|
| Schizophrenia | At least two symptoms—one of which must be delusions, hallucinations, or disorganized speech—for a minimum of 1 month; continuous symptoms for at least 6 months, during which time the person has impaired functioning in some area(s) of life. Note: Criteria are listed in Table 12.1. |
| Schizophreniform disorder | Symptoms meet all the criteria for schizophrenia except that the symptoms have been present for only 1–6 months; daily functioning may or may not have declined over that period of time. |
| Brief psychotic disorder | The sudden onset of positive symptoms, which persist between a day and a month, followed by a full recovery. No negative symptoms are present during the episode. |
| Schizoaffective disorder | Symptoms meet the criteria for both schizophrenia and mood disorder, with symptoms of schizophrenia present for at least 2 weeks without symptoms of a mood disorder, and a mood episode present during most of the period when the symptoms of schizophrenia are present. Negative symptoms of schizophrenia are less common with this disorder. |
| Delusional disorder | The presence of delusions that persist for at least 1 month, without a diagnosis of schizophrenia. |