Table 1 Participants Characteristics (mean听卤听standard deviation)
| 听 | Total Sample (n听=听202) | Girls (n听=听104) | Boys (n听=听98) | p c |
|---|---|---|---|---|
Age (months) | 19.74听卤听4.072 | 19.76听卤听4.05 | 19.71听卤听4.12 | 0.884 |
BMI (kg/m2) | 17.95听卤听1.64 | 17.78听卤听1.71 | 18.14听卤听1.56 | 0.427 |
BMI z-scores | 0.07听卤听0.93 | 0.06听卤听0.98 | 0.08听卤听0.89 | 0.934 |
Total physical activity (min/day) | 294.97听卤听59.03 | 289.98听卤听57.92 | 300.27听卤听60.02 | 0.109 |
Light physical activity (min/day) | 237.65听卤听44.92 | 235.95听卤听45.14 | 239.45听卤听44.86 | 0.351 |
Moderate to vigorous physical activity (min/day) | 57.32听卤听21.40 | 54.03听卤听18.42 | 60.82听卤听23.77 | 0.055 |
Sedentary time (min/day) | 262.77听卤听60.16 | 271.18听卤听59.97 | 253.85听卤听59.37 | 0.025 |
Screen time (min/day) | 76.38听卤听62.81 | 77.71听卤听71.98 | 74.97听卤听51.66 | 0.557 |
Sleep time (min/day)a | 739.66听卤听73.96 | 731.18听卤听72.25 | 784.66听卤听75.05 | 0.126 |
Consistency of bedtime (standard deviation of average bedtime in min)b | 44.71听卤听31.12 | 42.51听卤听23.42 | 47.05听卤听37.61 | 0.907 |
Consistency of wake up time (standard deviation of average wake up time in min)b | 45.56听卤听36.42 | 47.53听卤听45.8 | 43.5听卤听22.71 | 0.410 |
Accelerometer wear time (min/day) | 1297.40听卤听93.00 | 1292.34听卤听95.06 | 1302.78听卤听90.93 | 0.355 |