<unk>  is equally prevalent among men and women. The most common ages of onset are 18–24 for men and 18–35 for women. While the symptoms of schizophrenia often develop gradually over a period of years, the diagnostic criteria for<unk>  require a much more rapid onset. Available evidence suggests variations in incidence across sociocultural settings. In the United States and other developed countries, the incidence is low, possibly fivefold less than that of schizophrenia. In developing countries, the incidence is substantially higher, especially for the subtype "With Good Prognostic Features". In some of these settings<unk>  may be as common as schizophrenia.
Schizophreniform disorder
Schizoaffective disorder
Disorganized schizophrenia
Schizophrenia
Bipolar disorder not otherwise specified
Simple-type schizophrenia
Bipolar I disorder
Post-schizophrenic depression