investigated using each of these techniques.

Family studies

Genes and shared (or familial) environmental factors have a role in family resemblance. The majority of familial research on schizophrenia are concerned with relative risk. Despite the fact that the scope of diagnosis varies, the lifetime risk of schizophrenia in the general population is generally stated as 1%. Siblings of people with schizophrenia, on the other hand, constitute 13% of the population. The hazards for second- and

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