Table 1.

Mean difference and standard deviation (SD) for height, weight, and BMI of self-reported/corrected values and measured data, from cross-validation

	Boys		Girls
	mean	SD	mean	SD
Reported – measured
Height, cm	0.144	4.42	0.523	3.83
Weight, kg	−0.568	3.98	−0.826	3.26
BMI, kg/m2	−0.227	1.84	−0.451	1.62
Corrected Model A – measured
Height, cm	−0.006	2.97	−0.050	2.57
Weight, kg	0.033	2.96	−0.030	2.06
BMI, kg/m2	0.024	1.24	−0.004	1.04
Corrected Model B – measured
Height, cm	0.004	2.97	−0.009	2.40
Weight, kg	0.027	2.97	0.001	2.06
BMI, kg/m2	0.021	1.24	−0.004	0.99
Corrected Model C – measured
Height, cm	−0.001	3.06	−0.006	2.49
Weight, kg	0.045	2.97	0.013	2.06
BMI, kg/m2	0.024	1.26	−0.003	1.01
Corrected Model D – measured
Height, cm	−0.003	3.05	−0.002	2.49
Weight, kg	0.034	3.00	0.008	2.05
BMI, kg/m2	0.019	1.27	−0.006	1.01
Corrected Model E – measured
Height, cm	−0.008	3.04	−0.008	2.56
Weight, kg	0.061	3.09	−0.048	2.07
BMI, kg/m2	0.031	1.30	−0.025	1.04

Model A: linear terms and fractional polynomials of exact age and height_r or weight_r, body perception (five categories).

Model B: linear terms and fractional polynomials of exact age and height_r or weight_r, body perception (three categories).

Model C: age and height_r or weight_r, body perception (five categories).

Model D: age and height_r or weight_r, body perception (three categories).

Model E: age and height_r or weigh_t.