Figure 1 Bland and Altman plots for comparison of different approximations with actual body weight. (A) Estimation physician 1. (B) Estimation physician 2. (C) Best estimation of two physicians. (D) Anthropometric approximation, linear formula with three parameters and gender (model 1). (E) Anthropometric approximation, linear formula with four parameters and gender (model 2). (F) Anthropometric approximation, formula with four parameters and gender, with inclusion of transformed parameters (model 3). (G) Patients' self‐estimation.