Table 3.
Mean (SD) | Mean difference (95% CI), P value | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Intervention arm | Control arm | Intervention vs control (partial adjusted)a | Intervention vs control (further adjusted)b | |||||||||||
Outcomes | Baseline | 4 months | 12 months | Baseline | 4 months | 12 months | 4 months | P value | 12 months | P value | 4 months | P value | 12 months | P value |
Body fat % | ||||||||||||||
FU1 Intervention n = 911 Control n = 730 FU2: Intervention n = 844 Control n = 817 |
21.9 (7.1) | 21.0 (7.3) | 22.2 (7.8) | 21.8 (6.9) | 21.2 (7.2) | 22.3 (7.7) | −0.35 (−0.79 to 0.08) | 0.113 | −0.43 (−0.87 to 0.00) | 0.049 | −0.18 (−0.61 to 0.24) | 0.401 | −0.01 (−0.42 to 0.40) | 0.967 |
CHU-9D utility scorec | ||||||||||||||
FU2 Intervention n = 980 Control n = 1015 |
0.83 (0.2) | Not collected | 0.84 (0.2) | 0.84 (0.2) | Not collected | 0.83 (0.2) | N/A | 0.003 (−0.05 to 0.05) | 0.894 | N/A | 0.010 (−0.02 to 0.04) | 0.500 | ||
MDI Wellbeing Index score | ||||||||||||||
FU2 Intervention n = 980 Control n = 1015 |
58.5 (10.9) | Not collected | 59.1 (10.9) | 57.8 (11.1) | Not collected | 58.4 (11.5) | N/A | 1.90 (−3.07 to 6.87) | 0.499 | N/A | 0.56 (−2.15 to 3.27) | 0.687 |
CHU-9D Child Health Utility 9 Dimensions instrument, MDI middle-years development instrument, FU1 4-month follow-up, FU2 12-month follow-up, CI confidence interval, N/A not applicable
aAdjusted for school size, % free school meals, school BMIz, school baseline outcome, participant baseline outcome
bAdjusted for school size, % free school meals, school BMIz, sex, ethnicity, deprivation (index of multiple deprivation score for school postcode), age, participant baseline outcome, school baseline outcome
cMeasured on a zero to one scale with zero and one being a state equivalent to death and full health, respectively