Fig. 3From: Associations between female lung cancer risk and sex steroid hormones: a systematic review and meta-analysis of the worldwide epidemiological evidence on endogenous and exogenous sex steroid hormonesForest plots for higher levels of sex steroid hormone exposure on the risk of female lung cancer with a never-smokers and b ever-smokers. a. OR: Odds ratio; b. CI: Confidence interval; c. OC: Oral contraception; d. HRT: Hormone replacement therapyBack to article page