Hospitalization of Metropolitan employees in 1971.
D000328:Adult; D000367:Age Factors; D005163:Factor Analysis, Statistical; D005260:Female; D006760:Hospitalization; D006801:Humans; D007348:Insurance, Health; D008297:Male; D008875:Middle Aged; D009786:Occupational Health Services; D012737:Sex Factors; D013514:Surgical Procedures, Operative; D014481:United States