title: Considerations in the choice of expected numbers for appropriate comparisons in occupational cohort studies.
mesh_terms: D000368:Aged; D003644:Death Certificates; D004812:Epidemiologic Methods; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008175:Lung Neoplasms / Q000139:chemically induced / Q000453:epidemiology; D008297:Male; D009784:Occupational Diseases / Q000139:chemically induced / Q000453:epidemiology* / Q000401:mortality; D012907:Smoking; D012923:Social Class; D013223:Statistics as Topic