programmes, non-completers and partial completers rather than
completers.
Sensitivity analyses showed that, in general, the direction and
order of magnitude of coefficients that were significant in the
models estimated using imputed data were similar in those
estimated using complete case data (see Supplementary Information
for data). However, the material loss of power led to some
coefficients being estimated as non-significant in the complete
case analyses.
The reduction in BMI for 8–12 year old obese children was
0.79 kgm2 (95% CI (confidence interval) = 0.74, 0.84) in the
service data compared with 1.04 kgm2 (95% CI = 0.79, 1.29) in
the RCT (adjusted for baseline BMI, age, sex, ethnicity and housing
tenure). This difference was not statistically significant.