TABLE 3.
Outcomes at baseline and 12 months. Cost-effectiveness of a school-and family-based childhood obesity prevention programme in China: the “CHIRPY DRAGON” cluster-randomised controlled trial, China, 2016–17.
| Control group | Intervention group | Adjusted mean (95% CI) | ||||||
|---|---|---|---|---|---|---|---|---|
| Outcomes | N | Mean (SD) | N | Mean (SD) | Differencea (Intervention vs control) | p-value | Differenceb (Intervention vs control) | p-value |
| Baseline | ||||||||
| BMI z-score | 796 | −0.13 (1.30) | 822 | −0.13 (1.30) | ||||
| CHU-9D utility | 793 | 0.936 (0.069) | 812 | 0.938 (0.068) | ||||
| EQ-5D-3L utility | 596 | 0.961 (0.085) | 639 | 0.962 (0.081) | ||||
| At 12 months | ||||||||
| BMI z-score | 777 | −0.23 (1.34) | 804 | −0.35 (1.22) | −0.13 (−0.26 to 0.00) | 0.048 | −0.13 (−0.26 to -0.01) | 0.041 |
| CHU-9D (QALYs for children) | 781 | 0.932 (0.067) | 806 | 0.937 (0.059) | 0.004 (0.000–0.007) | 0.034 | 0.004 (−0.000–0.008) | 0.056 |
| EQ-5D-3L (QALYs for family members) | 584 | 0.965 (0.061) | 642 | 0.966 (0.066) | 0.002 (−0.002–0.006) | 0.329 | 0.002 (−0.002–0.007) | 0.421 |
Notes: BMI, body mass index; CHU-9D, Child Health Utility 9D; CI, Confidence Interval; EQ-5D-3L, Euro-QoL instrument; QALYs, Quality-Adjusted Life Years; SD, Standard Deviation.
=baseline adjusted model: adjusted for school clustering and baseline outcome.
=further adjusted model: adjusted for baseline outcome, prespecified school-level (i.e., whether the school provides midmorning snack, whether the school has an indoor activity room) and child-level sociodemographic (i.e., age, sex, and mother education level) and behavioural [daily average servings of fruit and vegetables, weekly servings of unhealthy snacks and sugar-added drink, objectively measured time in MVPA (minutes/24 h) and objectively measured sedentary time (minutes/24 h)] covariates.
Base case analysis used the further adjusted model.