[Association of indoor air pollution and passive smoking with lung cancer in Osaka, Japan].

A hospital-based case-control study was conducted at 8 hospitals in Osaka in order to clarify risk factors among non-smoking women. A total of 129 lung cancer cases and 519 controls were investigated. An elevated risk was observed for women who had used wood or straw as cooking fuels at 30 years of age. Maternal smoking in childhood also seemed to raise the risk. No elevated risks were observed for husband smoking and use of heating apparatus so far.