N | z-score/self-reported | z-score/direct | Difference for z-score | ||||||
---|---|---|---|---|---|---|---|---|---|
Mean | SD | Mean | SD | Mean | SD | 95% CI | P value* | ||
Boys | 791 | −0.22 | 1.03 | −0.08 | 1.01 | −0.14 | 0.70 | −0.19;- 0.09 | <0.0001 |
Girls | 815 | −0.40 | 0.94 | −0.12 | 0.95 | −0.28 | 0.53 | −0.31; -0.24 | <0.0001 |
BMI Response capability** | |||||||||
Boys | |||||||||
High | 419 | −0.28 | 1.00 | −0.11 | 0.99 | −0.18 | 0.62 | −0.24; -0.12 | <0.0001 |
Low | 360 | −0.16 | 1.06 | −0.04 | 1.06 | −0.12 | 0.80 | −0.20; -0.04 | 0.0053 |
Girls | |||||||||
High | 458 | −0.40 | 0.95 | −0.17 | 0.93 | −0.23 | 0.45 | −0.27; -0.19 | <0.0001 |
Low | 343 | −0.39 | 0.93 | −0.05 | 0.97 | −0.34 | 0.61 | −0.41; -0.28 | <0.0001 |