Table 2.
Baseline characteristics at the individual participant level by randomised group; usual practice (control) or the Girls Active programme (intervention)
| Individual level characteristics | Control (n = 885) |
Intervention (n = 867) |
Total (n = 1752) |
|---|---|---|---|
| Age, years (SD) | 12.8 (0.8) | 12.8 (0.8) | 12.8 (0.8) |
| Year group categories, n (%) | |||
| Year 7 | 356 (40.2) | 318 (36.7) | 674 (38.5) |
| Year 8 | 355 (40.1) | 365 (42.1) | 720 (41.1) |
| Year 9 | 174 (19.7) | 184 (21.2) | 358 (20.4) |
| Ethnicity categories, n (%) | |||
| White European | 669 (75.9) | 673 (77.1) | 1342 (76.8) |
| South Asian | 123 (14.0) | 81 (9.4) | 204 (11.7) |
| Other | 90 (10.2) | 112 (12.9) | 202 (11.6) |
| IMD decile, score (SD)a | 6.5 (2.8) | 5.1 (2.7) | 5.8 (2.8) |
| IMD rank, score (SD) | 19,649 (9395) | 15,322 (8840) | 17,505.8 (9375) |
| Biometric Measurements | |||
| Average standing height, cm (SD) | 156.1 (7.9) | 155.8 (7.8) | 156.0 (7.9) |
| Average sitting height, cm (SD) | 81.5 (4.6) | 81.1 (4.6) | 81.3 (4.6) |
| Body mass, kg (SD) | 48.7 (12.4) | 48.9 (12.4) | 48.8 (12.4) |
| BMI, z-score (SD) | 0.14 (1.3) | 0.22 (1.3) | 0.18 (1.3) |
| Percent body fat, % (SD) | 23.9 (7.6) | 24.2 (7.8) | 24.1 (7.7) |
| APHV, years (SD) | 12.1 (0.5) | 12.1 (0.5) | 12.1 (0.5) |
| BMI categories, n (%) | |||
| Underweight | 136 (15.7) | 129 (15.2) | 265 (15.4) |
| Normal weight | 543 (62.6) | 530 (62.4) | 1073 (62.5) |
| Overweight | 154 (17.7) | 149 (17.5) | 303 (17.6) |
| Obese | 35 (4.0) | 42 (4.9) | 77 (4.5) |
| Biological maturity categories, n (%) | |||
| Early | 139 (16.4) | 125 (15.0) | 264 (15.7) |
| Average | 576 (68.0) | 570 (68.5) | 1146 (68.3) |
| Late | 132 (15.6) | 137 (16.5) | 269 (16.0) |
| Accelerometer variables | |||
| MVPA, mins/day [IRQ] | 43.9 [30.6-58.0] | 41.8 [29.2-56.1] | 42.6 [29.9-57.0] |
| Light PA, mins/day [IRQ] | 279.5 [247.8-307.0] | 272.5 [244.5-302.7] | 275.8 [246.1-305.0] |
| Sedentary, mins/day [IRQ] | 549.4 [508.5-592.1] | 552.6 [516.0-594.3] | 550.6 [511.7-593.5] |
| Overall PA, mg (SD) | 36.7 (8.9) | 35.7 (8.8) | 36.2 (8.9) |
| Valid days, number (SD) | 6.6 (1.1) | 6.8 (0.9) | 6.7 (1.0) |
| Pupil’s achieving ≥ 60 mins MVPA on every valid day, n (%) | 20 (2.3) | 20 (2.4) | 40 (2.3) |
Values are presented as means (standard deviation) or median [interquartile range] for continuous variables and number (%) for categorical variables
aIMD 2015 decile score ranges 1–10, where 1 is the least deprived and 10 the most deprived
IMD index of multiple deprivation; BMI body mass index; APHV age at peak height velocity; MVPA moderate- to vigorous-intensity physical activity; PA physical activity
Missing data: 2 age; 4 ethnicity; 123 pupils social deprivation score; 30 standing height; 50 sitting height; 7 body weight; 34 BMI; 33 percentage body fat; 73 APHV, biological maturity; 44 MVPA, light PA; 46 pupils meeting PA guidelines, number of valid days; 58 sedentary; 0 all other variables