Fig. 3From: Reference Values of Cardiopulmonary Exercise Test Parameters in the Contemporary Paediatric PopulationCorrelation between observed and predicted values CPET ventilatory parameters using the Z-score model. The “underweight” group was represented by blue points, the “normal weight” group by green points, and the “overweight/obesity” group by red points. The correlation between measured and predicted values using the Z-score model for VTmax (panel A) and RRmax (panel B)Back to article page