Table 1 Characteristics of sample at baseline (T0)
Variable | Overall (n = 18 schools; n = 589 pupils) | Intervention (n = 9 schools; n = 286 pupils) | Control (n = 9 schools; n = 303 pupils) |
|---|---|---|---|
Country, N (%): | |||
 Ireland | 204 (34.6%) | 85 (29.7%) | 119 (39.3%) |
 NI | 385 (65.4%) | 201 (70.3%) | 184 (60.7%) |
Age in years; median (IQR; range) | 13 (1.0; 12–14) | 13 (1.0; 12–14) | 13 (1.0; 12–14) |
Height (cm); mean (SD) | 158 (7) | 158 (6) | 159 (7) |
Weight (kg); median (IQR; range) | 52 (14; 31–142) | 52 (14; 32–127) | 51 (14; 31–142) |
BMI z-score; mean (SD) | 0.65 (1.21) | 0.66 (1.20) | 0.64 (1.22) |
BMI categories [79], N (%): | |||
 Underweight | 45 (7.6%) | 20 (7.0%) | 25 (8.3%) |
 Normal weight | 321 (54.5%) | 157 (54.9%) | 164 (54.1%) |
 Overweight | 131 (22.2%) | 65 (22.7%) | 66 (21.8%) |
 Obese | 86 (14.6%) | 41 (14.3%) | 45 (14.9%) |
Waist circumference (cm); median (IQR; range) | 69 (13; 53–131) | 69 (13; 53–121) | 70 (12; 54–131) |
Hip circumference (cm); median (IQR; range) | 88 (11; 63–133) | 88 (11; 63–133) | 87 (11; 70–127) |
Waist:Hip ratio; median (IQR; range) | 0.8 (0.1; 0.7–1.1) | 0.8 (0.1; 0.7–1.0) | 0.8 (0.1; 0.7–1.1) |