The HMD failed to detect 70% of the obese patients. Only 64 patients (7.5%) were recorded in HMD as
obese although 216 (25%) were obese [BMI: ≥30kg/m2] (sensitivity: 0.2, positive predictive value: 0.7). Overall,
174 patients (20%) developed an in-hospital major complication which was significantly higher in the overweight
and obese comparing with patients with normal weight. HMD-recorded obesity was not independently associated
with major complications, whereas a dose–response relationship between weight and these complications was
observed (P=0.004). Using the actual weight and height of the participants instead of HMD-recorded diagnosis of
obesity improved model discrimination by 9%, with areas under ROC curve of: 0.69, 95% CI: 0.64-0.73 for the model
with HMD-recorded obesity compared with 0.75, 95% CI: 0.70-0.79 for the model with actual weight and height,
P