First-degree relatives of patients with schizophrenia may score higher on the Frankfurt Complaint Questionnaire (FCQ) than controls. The present study was designed to provide evidence of validity for the French version of the 24-item subscale of the Frankfurt Complaint Questionnaire (FCQ—24). In 27 first-degree relatives of patients with schizophrenia (high-risk group) and 30 controls, the high-risk group scored significantly higher on the FCQ, as expected.
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