Table 1.
Characteristics of participants.
| All (n = 635) | Boys (n = 283) | Girls (n = 352) | p | |
|---|---|---|---|---|
| Age (year) | 12.3 ± 0.3 | 12.3 ± 0.4 | 12.3 ± 0.3 | 0.063 |
| PDS at baselinea | 0.8 (0.4–1.2) | 0.6 (0.2–0.8) | 1.0 (0.6–1.4) | <0.001 |
| PDS at follow-up | 1.4 (1.0–2.0) | 1.0 (0.6–1.4) | 1.8 (1.4–2.2) | <0.001 |
| Maternal education (%) | 0.655 | |||
| Vocational school or less | 31.9 | 31.3 | 32.4 | |
| Polytechnic | 39.8 | 41.9 | 38.2 | |
| University | 28.3 | 26.8 | 29.4 | |
| Paternal education (%) | 0.531 | |||
| Vocational school or less | 50.5 | 52.7 | 48.7 | |
| Polytechnic | 28.9 | 26.6 | 30.8 | |
| University | 20.6 | 20.7 | 20.5 | |
| Days of MVPA at baseline | 6.0 (4.0–7.0) | 6.0 (4.0–7.0) | 5.0 (4.0–7.0) | 0.002 |
| Days of MVPA at follow-up | 5.0 (3.0–7.0) | 5.0 (3.0–6.0) | 5.0 (3.0–6.0) | 0.004 |
| Grade point average at baseline | 8.3 ± 0.6 | 8.1 ± 0.6 | 8.4 ± 0.6 | <0.001 |
| Grade point average at follow-up | 8.2 ± 0.9 | 7.8 ± 0.9 | 8.5 ± 0.7 | <0.001 |
Note: Data are from the Student t test or Mann-Whitney U test for continuous variables and χ2 test for categorical variables and are displayed as means ± SD, medians (interquartile range), or percentages (%).
Abbreviations: MVPA = moderate-to-vigorous physical activity; PDS = Pubertal Development Score.
a
Refers to IQR and interquartile range.