Sickness absences and social background.
D000041:Absenteeism; D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000437:Alcoholism; D005191:Family Characteristics; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009017:Morbidity; D009664:Norway; D009790:Occupations; D011632:Public Assistance; D012189:Retrospective Studies; D012737:Sex Factors; D012940:Social Problems; D013997:Time Factors