Confidence ellipses of individuals above the age of 12 based on the nutritional classification established form the Z-scores (a) of BMI, (b) of Z-%FM (ranked with the statistic criteria), (c) of Z-%FM (ranked with the IOTF criteria), and (d) from the nutritional classification based on the fat mass index.

(a) p<0.001 obesity vs. overweight. (b) p<0.05 normal fat vs. the rest; p = 0.25 obesity vs. overfat. (c) p>0.05 between groups. (d) p<0.001 obesity vs. no obesity.