Life changes and social group in relation to illness onset.
D000328:Adult; D000367:Age Factors; D002908:Chronic Disease; D005260:Female; D005387:Finland; D006801:Humans; D008016:Life Change Events; D008297:Male; D008875:Middle Aged; D009017:Morbidity; D009786:Occupational Health Services / Q000706:statistics & numerical data; D009790:Occupations; D012923:Social Class