Assortative mating among in-patients with primary affective disorder

Area of Science:

• Psychiatry
• Genetics
• Behavioral Science

Background:

• Assortative mating, the tendency of individuals to marry partners with similar traits, is well-documented in various human characteristics.
• Its role in the context of psychiatric disorders, particularly primary affective disorders, warrants further investigation to understand genetic and environmental influences.

Purpose of the Study:

• To investigate assortative mating patterns in married patients diagnosed with primary affective disorders.
• To determine the prevalence of psychiatric illness among their spouses and first-degree relatives.

Main Methods:

• Direct interviews and standardized diagnostic criteria were used to assess psychiatric illness in 56 patients and their spouses.
• Prevalence of psychiatric and affective illness was compared between relatives of ill spouses and well spouses.

Main Results:

• A high degree of assortative mating was observed for total psychiatric illness, broad spectrum affective illness, and major depression.
• Spouses of patients showed a higher prevalence of psychiatric and affective disorders compared to spouses of well individuals.
• Increased psychiatric disorder prevalence was noted in first-degree relatives of ill spouses versus well spouses.
• High diagnostic concordance for affective illness and alcoholism was found between patients and spouses.
• Bipolar patients demonstrated higher assortative mating than unipolar patients.

Conclusions:

• The findings support the hypothesis that individuals with a predisposition to psychiatric illness tend to marry others with similar predispositions.
• Assortative mating, rather than marital interaction, appears to be a significant factor in the observed concordance of psychiatric disorders within couples.