Fig. 4From: Reproductive factors and risk of lung cancer among 300,000 Chinese female never-smokers: evidence from the China Kadoorie Biobank studyAdjusted hazard ratios of lung cancer according to childbearing factors by geographical regions. Models adjusted for age, region, occupation, education, log-height, log-weight, physical activity, family history of cancer, personal history of lung disease, alcohol drinking, frequency of environmental tobacco smoke exposure, heating fuel during winter, cooking fuel and oral contraceptive useBack to article page