Table 1 Baseline characteristics of the sample
Variable | Control (n = 62) | Intervention (n = 169) | p-value |
|---|---|---|---|
Age distribution (%) | |||
  < 9 yrs | 30 (48.4) | 95 (56.2) | 0.29 |
 9–10 yrs | 32 (51.6) | 74 (43.7) |  |
Sex (%) | |||
 Female | 33 (53.2) | 79 (46.7) | 0.38 |
 Male | 29 (46.8) | 90 (53.2) |  |
Ethnicity (%) | |||
 Caucasian | 20 (32.2) | 60 (35.5) | 0.03 |
 Mixed | 5 (8.1) | 24 (14.2) |  |
 Asian | 15 (24.2) | 23 (13.6) |  |
 Black | 16 (25.8) | 26 (15.4) |  |
 Other | 6 (9.7) | 36 (21.3) |  |
Body mass index (kg/m2) | 17.3 ± 2.9 | 17.5 ± 3.4 | 0.63 |
Body fat (%) | 22.6 ± 7.0 | 21.5 ± 7.4 | 0.30 |
Hand grip (kg) | 13.4 ± 3.8 | 13.0 ± 4.7 | 0.52 |
Sit and reach (cm) | 23.2 ± 5.8 | 23.2 ± 16.9 | 0.98 |
Horizontal jump (cm) | 110.4 ± 18.5 | 106.8 ± 20.7 | 0.23 |
Peak flow (l/min)a | 204.9 ± 41.9 | 154.0 ± 55.7 | 0.001 |
Actigraph wear time (min/d) | 715.2 ± 85.9 | 755.9 ± 83.9 | 0.001 |
Valid wear days | 4.3 ± 1.5 | 4.7 ± 1.7 | 0.14 |
Total MVPA (min/d) | 24.8 ± 12.3 | 30.1 ± 17.5 | 0.03 |
Total light activity (min/d) | 337.6 ± 70.9 | 392.2 ± 56.9 | 0.001 |
Total sedentary (min/d) | 352.7 ± 55.9 | 333.6 ± 75.4 | 0.07 |
School time MVPA (min/d) | 14.1 ± 7.6 | 13.6 ± 7.5 | 0.69 |
School light activity (min/d) | 158.7 ± 29.5 | 178.1 ± 31.1 | 0.001 |
School time sedentary (min/d) | 187.2 ± 32.3 | 168.3 ± 32.2 | 0.001 |