Fig. 3

The discriminative power of different models to predict risk of obesity [BMI (kg/m²) ≥27.5 compared with 18.5 kg/m² < BMI < 23 kg/m²]. The area under the receiver operating characteristic curve (ROC AUC) is investigated: Model 1 = age, age², sex and case status; model 2 = all 95 single nucleotide polymorphisms; model 3 = model 1 + model 2