It is argued that as the major occupational cancer risks become matters of historical interest, research epidemiologists working in the field should broaden their approaches to encompass life style factors. In the investigation of possible low-cancer risks, it no longer makes any sense to confine their data-collecting activities solely to exposure to dusts and chemicals at work and to regard exposure to chemicals at home, in the garden or during leisure activities simply as possible confounding variables. Furthermore it is becoming more and more meaningless to undertake any epidemiological investigation aimed at detecting or defining a low level of cancer risk without taking into account what and how much, for example, people eat, drink and smoke. Possible exposure to chemicals at work is increasingly becoming a source for confounding variables in relation to life-style-associated cancer risks, as distinct from life-style being a source of confounding variables in epidemiological studies of occupation-associated cancer risks.
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