title: An assessment of the effect of improved working conditions on bladder tumor incidence in a benzidine manufacturing facility.
abstract: Bladder tumor cases at a dye manufacturing plant showed a statistically significant reduction in incidence of tumors following the advent of process changes and strict industrial hygiene control. A useful method of statistical analysis is employed which may have wider use, especially in cases lacking complete epidemiological data.
mesh_terms: D000611:Aminobiphenyl Compounds; D001560:Benzidines; D002273:Carcinogens; D002617:Chemical Industry / Q000592:standards*; D004781:Environmental Exposure; D005500:Follow-Up Studies; D006801:Humans; D009518:New York; D009784:Occupational Diseases / Q000139:chemically induced* / Q000453:epidemiology; D001749:Urinary Bladder Neoplasms / Q000139:chemically induced* / Q000453:epidemiology
chemical_list: D000611:Aminobiphenyl Compounds; D001560:Benzidines; D002273:Carcinogens