Schizophrenia

Various psychotic symptoms, such as delusions, hallucinations, disorganized speech, restricted or inappropriate affect, and catatonia

6 months or more

1.0%

Brief psychotic disorder

Various psychotic symptoms, such as delusions, hallucinations, disorganized speech, restricted or inappropriate affect, and catatonia

Less than 1 month

Unknown

Schizophreniform disorder

Various psychotic symptoms, such as delusions, hallucinations, disorganized speech, restricted or inappropriate affect, and catatonia

1 to 6 months

0.2%

Schizoaffective disorder

Marked symptoms of both schizophrenia and a major depressive episode or a manic episode

6 months or more

Unknown

Delusional disorder

Persistent delusions that are not bizarre and not due to schizophrenia; persecutory, jealous, grandiose, and somatic delusions are common

1 month or more

0.1%

Psychotic disorder due to another medical condition

Hallucinations, delusions, or disorganized speech caused by a medical illness or brain damage

No minimum length

Unknown

Substance/medication-induced psychotic disorder

Hallucinations, delusions, or disorganized speech caused directly by a substance, such as an abused drug

No minimum length

Unknown

(Information from: APA, 2013.)