Table 3.
Weight (kg) outcome differences between and within study groups from baseline to 3, 6, and 12 months (intention-to-treat [ITT] and complete-case analysis).
| Analysis and month | Change from baseline, mean (95% CI)a | Difference between groupsb | |||
|
|
Intervention | Control | Mean (95% CI) | P | |
| ITT c |
|
|
|
|
|
|
|
3 | –3.41 (–4.70, –2.13)*** | –0.52 (–1.55, 0.52) | –2.70 (–4.27, –1.13) | .001 |
|
|
6 | –3.47 (–4.95, –1.98)*** | –0.81 (–2.23, 0.61) | –2.49 (–4.50, –0.48) | .02 |
|
|
12 | –2.38 (–3.48, –0.97)** | –1.80 (–3.15, –0.44)* | –0.27 (–2.16, 1.61) | .77 |
| Complete case d |
|
|
|
|
|
|
|
3 | –4.37 (–5.80, –2.94)*** | –0.53 (–1.60, 0.54) | –3.66 (–5.28, –2.05) | <.001 |
|
|
6 | –5.28 (–7.12, –3.44)*** | –0.86 (–2.38, 0.65) | –4.16 (–6.46, –1.86) | .001 |
|
|
12 | –4.48 (–7.34, –2.37)** | –2.16 (–4.58, –0.62)* | –1.89 (–4.42, 0.64) | .14 |
a Within-group weight changes were analyzed using paired-sample t tests and only significant results are presented. * P<.05, ** P<.01, *** P<.001.
b Difference between groups analyzed using ANCOVA and adjusted for baseline weight.
c ITT analysis: control group (n=33) and intervention group (n=32) at 3, 6, and 12 months.
d For the complete-case analysis: control group (n=32) at 3 months, (n=30) at 6 months, and (n=29) at 12 months. Intervention group (n=25) at 3 months, (n=21) at 6 months, and (n=17) at 12 months.