Table 2 Adjusted differences for body mass index (BMI) z-score between control and intervention groups at 4 and 12 months follow-up.

From: Effectiveness and cost-effectiveness of The Daily Mile on childhood weight outcomes and wellbeing: a cluster randomised controlled trial

  

Mean (SD) BMIz

Mean difference (95% CI), P value

Intra-cluster correlation coefficientd

Time point

No of participantsa

Intervention arm

Control arm

Intervention v control (partial adjusted)b

Intervention v control (further adjusted)c

 

Baseline

 

0.37 (1.25)

0.38 (1.25)

   

4 months

Intervention n = 911

Control n = 732

0.42 (1.24)

0.42 (1.24)

−0.045 (−0.093 to 0.003), 0.07

−0.056 (−0.103 to −0.009), 0.02

0.005

12 months

Intervention n = 850

Control n = 820

0.45 (1.29)

0.47 (1.3)

−0.036 (−0.085 to 0.013), 0.15

−0.033 (−0.084 to 0.017), 0.20

0.001

  1. an for both partially and further adjusted analyses
  2. bAdjusted for school size, % free school meals, school BMIz, school baseline outcome, participant baseline outcome
  3. cAdjusted 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
  4. dEstimates are unadjusted
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