Social problems such as long-term unemployment, poverty, homelessness, exploitation, and victimization are commonly correlated with schizophrenia. In severe cases people may be admitted to hospitals. The other half will have a lifelong impairment. Ībout half of those diagnosed with schizophrenia will have a significant improvement over the long term with no further relapses, and a small proportion of these will recover completely. Possible environmental factors include being raised in a city, cannabis use during adolescence, infections, the ages of a person's mother or father, and poor nutrition during pregnancy. Genetic factors include a variety of common and rare genetic variants. The causes of schizophrenia include genetic and environmental factors. Males are more often affected and on average have an earlier onset. In 2017, there were an estimated 1.1 million new cases and in 2022 a total of 24 million cases globally.
Ībout 0.3% to 0.7% of people are diagnosed with schizophrenia during their lifetime. Many people with schizophrenia have other mental disorders, especially substance use disorders, depressive disorders, anxiety disorders, and obsessive–compulsive disorder. To be diagnosed with schizophrenia, symptoms and functional impairment need to be present for six months ( DSM-5) or one month ( ICD-11). There is no objective diagnostic test diagnosis is based on observed behavior, a history that includes the person's reported experiences, and reports of others familiar with the person. Symptoms typically develop gradually, begin during young adulthood, and in many cases never become resolved. Other symptoms include social withdrawal, decreased emotional expression, and apathy. Major symptoms include hallucinations (typically hearing voices), delusions, and disorganized thinking. Schizophrenia is a mental disorder characterized by continuous or relapsing episodes of psychosis. Substance use disorder, Huntington's disease, mood disorders ( bipolar disorder), autism, borderline personality disorder Ģ0–28 years shorter life expectancy Suicide, heart disease, lifestyle diseases įamily history, cannabis use in adolescence, problems during pregnancy, childhood adversity, birth in late winter or early spring, older father, being born or raised in a city īased on observed behavior, reported experiences, and reports of others familiar with the person Hallucinations (usually hearing voices), delusions, confused thinking
/ ˌ s k ɪ t s ə ˈ f r iː n i ə/, UK also / ˌ s k ɪ d z ə-/, US also /- ˈ f r ɛ n i ə/.
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