Research has consistently shown that the more closely related a person is to someone who has schizophrenia, the greater the risk that he or she will be diagnosed with schizophrenia at some point in his or her lifetime.

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This is a well-established finding in schizophrenia research, known as the "family risk" or "genetic risk" factor for schizophrenia. Studies have shown that first-degree relatives (such as parents, siblings, and children) of individuals with schizophrenia have a significantly higher risk of developing the disorder compared to the general population. The risk varies depending on the degree of genetic relatedness and other factors, but estimates range from around 6-10% for first-degree relatives to much lower levels for more distant relatives or those with no familial connection to schizophrenia.

Research Has Consistently Shown That the More Closely Related a Person