Hazard ratios and 95% CI associated with severe obesity (body mass index ≥35) compared to the reference group (body mass index <25) for each survival outcome by the categories of each covariate. (A) Overall mortality. (B) Breast cancer mortality. (C) Recurrence estimates were adjusted for all the variables in the full model. The size of the interval and the box are proportional to the amount of information available per stratum. GEICAM, Spanish Breast Cancer Research Group; BCIRG, Breast Cancer International Research Group; pT, pathologic primary tumor size; surg, surgery; HER2: human epidermal growth factor-2; ER, estrogen receptor; PR, progesterone receptor.