Table 3. Corrected BMI (mean, standard deviation –sd, Cole’s classification, Kappa and Intraclass correlation coefficients indexes with 95% confidence intervals −95%CI).
| Boys | Girls | |
| Correction by body shape perception: model 1 | ||
| Mean corrected BMI (sd) | 22.21 (2.62) | 22.02 (3.49) |
| Mean corrected BMI-actual BMI (sd) | −0.00 (1.68) | −0.00 (1.33) |
| Corrected BMI classification (%) | ||
| Underweight | 3.7 | 7.1 |
| Normal weight | 79.1 | 80.0 |
| Overweight | 16.0 | 10.7 |
| Obese | 1.2 | 2.1 |
| Agreement with actual BMI | ||
| Weighted Kappa | 0.63 | 0.65 |
| (95%CI) | (0.50–0.76) | (0.52–0.78) |
| ICC | 0.67 | 0.74 |
| (95%CI) | (0.58–0.74) | (0.66–0.81) |
| % of correctly classified (%) | 85.3 | 85.0 |
| Correction by objective socioeconomic status: model 2 | ||
| Mean corrected BMI (sd) | 22.21 (2.55) | 22.02 (3.45) |
| Mean corrected BMI-actual BMI (sd) | −0.00 (1.78) | −0.00 (1.78) |
| Corrected BMI classification (%) | ||
| Underweight | 4.3 | 5.0 |
| Normal weight | 81.0 | 82.1 |
| Overweight | 14.7 | 10.7 |
| Obese | 0.0 | 2.1 |
| Agreement with actual BMIa | ||
| Weighted Kappa | 0.58 | 0.68 |
| (95%CI) | (0.44–0.72) | (0.55–0.82) |
| ICC | 0.59 | 0.76 |
| (95%CI) | (0.48–0.68) | (0.68–0.82) |
| % of correctly classified (%) | 83.4 | 87.1 |
a
overweight and obese are aggregated for boys.
Source: Escapad Paris 2010, analytic subsample without non-respondents (n = 303).