Fig. 2

Bland–Altman plots of differences between measured and self-reported height and weight. a, b reflect Bland-Altman plots for height and weight, respectively, for boys and girls. c, d show also the plots for height and weight data, where points of overweight/obese subjects are highlighted with purple square dots. The Blue dots are the points of non-overweight subjects. The continuous bold lines in the graphs represent the mean differences, the narrow lines 95 % limits of agreement for whole sample (n = 3379), where upper limit is +1.96 SD and lower limit is −1.96 SD from the mean differences. height-M and weight-M directly measured height and weight, respectively, height-SR and weight-SR self-reported height and weight, respectively