Work and disability at the age of 30 years. A sociomedical study of a birth-cohort from Bergen. I. Description of project and methods.
D000328:Adult; D000367:Age Factors; D006233:Persons with Disabilities; D004522:Educational Status; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D009664:Norway; D010808:Physical Examination; D011581:Psychological Tests; D012959:Socioeconomic Factors; D014937:Work