Table 3.

Mean differences with SD for prevalence rates (%) of weight status between corrected and measured data

Weight status	Uncorrected 1	Model A	Model B	Model C	Model D	Model E	Model F
Boys
Strong underweight	1.40	0.23 ± 1.19	0.21 ± 1.10	0.41 ± 1.08	0.46 ± 1.10	0.23 ± 1.18	0.03 ± 1.07
Underweight	0.50	0.31 ± 1.71	0.39 ± 1.82	0.55 ± 1.86	0.48 ± 1.78	0.19 ± 1.96	−0.10 ± 1.68
Normal weight	−0.06	0.39 ± 2.28	0.28 ± 2.40	0.10 ± 2.42	−0.06 ± 2.56	0.76 ± 2.46	0.02 ± 2.47
Overweight	−0.73	−0.32 ± 1.99	−0.21 ± 2.02	−0.58 ± 1.93	−0.15 ± 2.01	−0.31 ± 1.99	0.01 ± 2.14
Obese	−1.12	−0.60 ± 1.32	−0.67 ± 1.36	−0.49 ± 1.30	−0.73 ± 1.36	−0.88 ± 1.25	−0.02 ± 1.32
Girls
Strong underweight	0.84	−0.37 ± 0.73	−0.07 ± 0.77	−0.35 ± 0.72	−0.04 ± 0.71	−0.56 ± 0.73	−0.06 ± 0.72
Underweight	1.79	0.07 ± 1.53	0.07 ± 1.43	0.04 ± 1.06	−0.35 ± 1.55	0.07 ± 1.55	0.02 ± 1.54
Normal weight	0.78	2.45 ± 2.35	1.39 ± 2.40	1.88 ± 2.30	1.89 ± 2.35	2.45 ± 2.28	0.03 ± 2.33
Overweight	−1.91	−0.77 ± 1.87	−0.39 ± 2.09	−0.52 ± 2.00	−0.59 ± 2.00	−0.51 ± 1.84	−0.15 ± 1.89
Obese	−1.49	−1.39 ± 1.18	−1.00 ± 1.26	−1.05 ± 1.21	−0.91 ± 1.25	−1.46 ± 1.25	0.06 ± 1.21

¹Uncorrected difference (prevalence rates of weight status based on self-reports minus prevalence rates based on measured data).

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 weight_r.

Model F: application of the formula of Kurth and Ellert [14].