The mental health of the unmarried.
D000223:Adaptation, Psychological; D000328:Adult; D002140:California; D005260:Female; D006801:Humans; D007398:Interpersonal Relations; D008297:Male; D008393:Marriage; D001523:Mental Disorders / Q000453:epidemiology; D008603:Mental Health; D010551:Personality; D011593:Psychology, Social