The relationship between human health and the environment is generally acknowledged, even by those outside the professional medical and public-health arenas. Moreover, epidemiologists, whose responsibility is to identify possible cause and effect relationships in human disease, invariably include in their descriptions of a population under study its sex composition, together with age, race, smoking history, and other characteristics. It could be expected that information pertaining to occupationally related health effects would be comparably available for men and women workers.