Table 3.
Group difference in prevalence of weight status at T4
| T1 | T4 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Intervention (I1) n = 178 | Control (C1) n = 181 | Intervention (I4) n = 96 | Control (C4)n = 113 | Difference T1-T4 | ||||||
| Weight statusa (%) | n | % | n | % | n | % | n | % | DD = (I 4 -I 1 )-(C 4 -C 1 ) | p |
| Underweight | 11 | 6.2 | 11 | 6.1 | 6 | 6.3 | 6 | 5.3 | 0.9 | 0.99 |
| Normal weight | 121 | 67.7 | 122 | 67.4 | 52 | 54.2 | 72 | 63.7 | −9,8 | 0.06 |
| Overweight | 30 | 16.9 | 25 | 13.8 | 26 | 27.1 | 24 | 21.2 | 2.8 | 0.71 |
| Obesity | 16 | 9.0 | 23 | 12.7 | 12 | 12.5 | 11 | 9.7 | 6.5 | 0.12 |
Results of independent samples t-test
DD difference in difference
p = between intervention and control groups
Subjects are dependent observations between T1 and T4 with valid measurements at T2
aDefined according to Cole et al. [21]