Table 1.
Z-score of main anthropometric and body composition variables of total sample.
Fig 1.
Nutritional classification of total sample based on the Z-BMI, the Z-abdominal circumference and the Z-% fat mass.
The bars represent percentage of children. Black bars: obesity or abdominal obesity; grey bars: overweight, excess of central fat mass or overfat; white bars: normal central fat mass or normal fat. BMI: body mass index; ACi: abdominal circumference; FM: fat mass; Stat.: cut-offs according to the statistical criteria; IOTF: cut-offs according to the IOTF criteria.
Table 2.
Z-score of main anthropometric and body composition variables of stratified sample (children under the age of 12 and children over the age of 12).
Fig 2.
Nutritional classification based on the Z-BMI, the Z-% fat mass and the fat mass index in stratified sample (children under the age of 12 and children over the age of 12).
The bars represent percentage of children. Black bars: obesity; grey bars: overweight or overfat; white bars: normal fat or non-obesity. BMI: body mass index; FM: fat mass; Stat.: cut-offs according to the statistical criteria; IOTF: cut-offs according to the IOTF criteria; FMI: fat mass index.
Fig 3.
Bland-Altman analysis between the Z-BMI scores and the Z-%FM scores.
The difference between the Z-scores from BMI and those of the Z-%FM was -1.088 (95% CI: -2.602 to 0.426), and there was only 1 case (0.6%) above the upper threshold the agreement interval, and 9 (5.3%) below the lower threshold.
Table 3.
Contingency table of the nutritional classification based on the Z-BMI and the Z-% fat mass.
Table 4.
Results of the quantitative and qualitative concordance analysis of stratified sample (children under the age of 12 and children over the age of 12).
Fig 4.
Confidence ellipses of the total sample based on the nutritional classification established form the Z-scores (a) of BMI, (b) of Z-%FM (ranked with the statistic criteria), and (c) of the Z-%FM (ranked with the IOTF criteria).
(a) p<0.001 obesity vs. overweigth. (b) p<0.001 between groups. (c) p<0.001 nornal fat vs. the rest; p = 0.036 overfat vs. obesity.
Fig 5.
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.
Fig 6.
Confidence ellipses of individuals under 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), and (c) of Z-%FM (ranked with the IOTF criteria).
(b) p<0.001 overfat vs. obesity; (c) p = 0.001 overfat vs. obesity.
Fig 7.
Tolerance ellipses based on the nutritional classification based on the Z-score of the (a) BMI, (b) Z-%FM ranked with the statistic criteria, (c) Z-%FM ranked with the IOTF criteria, in the total sample; and (d) fat mass index in children over the age of 12.
Yellow dots: severe obesity; red dots: obesity; blue dots: overweight (body mass index), overfat (% fat mass) or no obesity (fat mass index); green dots: normal fat.