Fig. 2: Normal weight obesity (NWO) and premenopausal and postmenopausal breast cancer.

a Normal weight obesity (NWO) and premenopausal breast cancer. b NWO, and postmenopausal breast cancer. Cox proportional hazard models were employed to calculate the hazard ratios (HRs) and 95% confidence intervals (CIs). c Meta-analysis for the associations between per 5-unit increment in percent body fat (PBF) and postmenopausal breast cancer among females with normal BMI. d Dose-response meta-analysis of PBF level with postmenopausal breast cancer among females with normal BMI. The P-value was estimated using maximum likelihood estimation with the R package dosresmeta.