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在沈阳进行一项病例对照研究,包括1249例现症肺癌和1345名以全人口为基础的对照.研究证明吸烟仍是第一位病因,占男性病因(PAR)的55%及女性的37%,在家取暖烹饪所产生的室内空气污染(主要是煤烟)与肺癌有显著相关,估计占病因的10～20%.病例组报告其住宅周围有烟或二百米内有工厂大烟囱者比对照组多.住有色金属冶炼厂附近一公里内者在男性可见肺癌危险性升高(OR=3.0).其它显著相关因素还有冶金工业和化工制药职业暴露和慢性气管炎和肺结核.室内氡水平仅在小细胞型肺癌见到有轻微相关.
A case-control study in Shenyang, including 1249 cases of lung cancer and 1345 population-based controls, showed that smoking was still the first cause, accounting for 55% of male causes (PAR) and 37% of women , Indoor air pollution (mainly soot) from cooking at home was significantly associated with lung cancer, estimated at 10-20% of the cause. The case group reported a smoker around the house or a large factory chimney within 200 meters Group more than live within one kilometer of non-ferrous metal smelters showed a higher risk of lung cancer in men (OR = 3.0) .Other significant related factors are occupational exposure to metallurgical and chemical pharmaceuticals and chronic bronchitis and tuberculosis. Indoor radon levels Slight correlation was seen only in small cell lung cancer.