Sex ratio of siblings of psychiatric patients.
The sex ratio of the full siblings was examined for 279 patients with schizophrenia, 416 with affective psychosis, and 1259 patients with other psychiatric diagnoses. An overall excess of brothers was found, but there was no significant difference in the sibling ratio between any of the diagnostic groups. The excess of brothers probably reflects the pattern of live births in the general population.
D005191:Family Characteristics; D005260:Female; D006801:Humans; D008297:Male; D001523:Mental Disorders / Q000235:genetics*; D012737:Sex Factors