There is no difference in the prevalence of schizophrenia between men and women; however, the age of onset is affected. Men tend to develop it between 15 and 25 years of age and women between 25 and 35 years of age.
Having a first degree relative with schizophrenia increases a patients' risk of schizophrenia tenfold. Being born in the cold winter months or in an area of high population density have also been associated with increased risk (though less so).
This is the tendency of schizophrenics to be of lower socioeconomic status. It is generally thought that this is due to inability to function well in society, causing a "drift" into lower socioeconomic classes.
What is the dopamine hypothesis?
This is the classic understanding of schizophrenia, which attributes the symptoms of schizophrenia to hyperactivity of the dopaminergic system. Many other theories have been postulated, however, especially involvement of Glutamate.
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