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Related Experiment Videos

Assortative mating for major psychiatric diagnoses in two population-based samples

H H Maes1, M C Neale, K S Kendler

  • 1Department of Human Genetics, Virginia Commonwealth University, Richmond 23298-0003, USA.

Psychological Medicine
|December 17, 1998
PubMed
Summary

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Spouses show moderate assortative mating for psychiatric disorders, with resemblance occurring within and across diagnoses. This marital resemblance is largely independent of shared demographic factors like age or education.

Area of Science:

  • Psychiatry
  • Behavioral Genetics
  • Sociology

Background:

  • Previous research on assortative mating in psychiatric disorders yielded inconsistent results.
  • Investigated marital associations for diagnoses including alcoholism, generalized anxiety disorder, major depressive disorder, panic disorder, and phobias.

Purpose of the Study:

  • To determine if significant associations exist for psychiatric diagnoses between spouses in population-based samples.
  • To examine whether marital resemblance for psychopathology is primary (direct) or secondary (correlated with other variables).

Main Methods:

  • Employed a mate selection model to differentiate primary and secondary assortative mating.
  • Accounted for within-person comorbidity and across-spouse data in two population samples.

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Main Results:

  • Found moderate assortative mating within and across psychiatric diagnoses.
  • Assortment for correlated variables (age, religion, education) explained only a small portion of marital resemblance for mental illness.
  • Findings replicated across two samples, confirming comorbidity and assortment patterns.

Conclusions:

  • Established significant, moderate primary assortative mating for psychiatric disorders.
  • Concluded that the impact of assortative mating on twin study bias is negligible.