Table 1 The individual-level characteristics of current research participants
|  | Male (n = 4088) | Female (n = 4015) | ||
|---|---|---|---|---|
Mean (SD) or n (%) | Mean (SD) or n (%) | |||
Individual characteristics | ||||
 Age (years) | 13.1 | ( 1.4) | 13.1 | ( 1.4) |
 Height (cm) | 154.3 | ( 11.9) | 151.1 | ( 7.9) |
 Body weight (kg) | 44.9 | ( 11.4) | 42.5 | ( 8.3) |
 Body mass index percentile | 41.3 | ( 28.1) | 38.5 | ( 27.1) |
Weight status | ||||
 Overweight | 419 | ( 10.2%) | 229 | ( 6.8%) |
 Non-Overweight | 3668 | (89.8%) | 3136 | (93.2%) |
Birth month | ||||
 Q1(April-June) | 1025 | (25.1%) | 830 | (24.7%) |
 Q2(July–September) | 1129 | (27.6%) | 914 | (27.2%) |
 Q3(Octorber-December) | 933 | (22.8%) | 792 | (23.5%) |
 Q4(January-March) | 1000 | (24.5%) | 829 | (24.6%) |
Organized sports participation | ||||
 Joining | 3180 | (77.8%) | 1803 | (53.6%) |
 Not-Joining | 907 | (22.2%) | 1562 | (46.4%) |
 MVPA time (min/day) | 77.6 | ( 68.9) | 55.2 | ( 60.4) |