Fig. 3From: Breast cancer risk factors in Iranian women: a systematic review and meta-analysis of matched case–control studiesThe association between breast cancer and different risk factors. A: Physical activity (occasionally and never vs active); B smoking (yes vs no); C: second-hand smoking (yes vs no); D: alcohol use (yes vs no); E: supplement intake (yes vs no); F: parity (having child vs nulliparous)Back to article page