Cancer incidence by living area, social class and occupation.
本文概述了不同地理区域和社会经济阶层之间癌症发病率的差异，指出这些差异多与吸烟、饮食、性行为及女性生育史等生活方式因素有关，并强调吸烟是解释不同职业群体肺癌风险差异的关键因素。
The variation in the incidence of cancer between geographic areas and socio-economic classes is outlined. In many instances the differences in the incidence can be attributed to differences in life-style factors such as smoking, diet, sexual habits, and the reproductive history of women. The role of smoking as an explanation of the variation in the risk of lung cancer between occupational groups is emphasized.