Assortative mating among in-patients with primary affective disorder.
Assortative mating among 56 married in-patients with primary affective disorders and their spouses was studied by determining the prevalence of psychiatric illness among the spouses by means of direct interviews and standardized diagnostic criteria. A high degree of assortative mating among both male and female patients was observed for total psychiatric illness, broad spectrum affective illness and major depression. A significantly higher prevalence of psychiatric and affective illness was found among the first-degree relatives of the ill spouses when compared with the first-degree relatives of the well spouses. There was a high degree of diagnostic concordance between the patients and spouses for both affective illness and alcoholism, with a higher degree of assortative mating among bipolar patients than among unipolar patients. The finding in this study of an increased prevalence of psychiatric disorder in the first-degree relatives of the ill spouses would support the hypothesis that there is a tendency for individuals with a predisposition to psychiatric illness to marry, rather than the existence of a marital interaction which causes an increased concordance for psychiatric illness.
D000293:Adolescent; D000328:Adult; D000341:Affective Disorders, Psychotic / Q000235:genetics*; D000367:Age Factors; D001714:Bipolar Disorder / Q000235:genetics; D003866:Depressive Disorder / Q000235:genetics; D005260:Female; D005828:Genetics, Population; D006801:Humans; D008297:Male; D008393:Marriage; D001523:Mental Disorders / Q000453:epidemiology; D008875:Middle Aged; D012737:Sex Factors