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Table 3 Changes in Weight and Self-Efficacy by Arm

From: A technology-assisted health coaching intervention vs. enhanced usual care for Primary Care-Based Obesity Treatment: a randomized controlled trial

  GEM (Phase 1 and Phase 2) n = 21 EUC n = 22 p-value
Weight
 3-month weight changes    
3-month weight change (kg) Mean ± SDa −0.80 ± 1.95 0.07 ± 2.40 0.07
3-month 3.0% weight loss 6.25% 14.29% 0.62†
6-month weight changes
6-month weight change (kg) Mean ± SDa −1.52 ± 3.05 0.23 ± 3.64 0.08
6-month 3.0% weight loss 21.05% 23.81% 0.99†
12-month weight changes
12-month weight change (kg) Mean ± SDa −1.02 ± 4.16 0.74 ± 4.90 0.40
12-month 3.0% weight loss 27.78% 20.00% 0.71†
Self-efficacy
 3-month changes in self-efficacy    
Dietary self-efficacy Mean ± SDa 6.38 ± 8.92 3.81 ± 11.63 0.23
Physical activity self-efficacyMean ± SDa 3.06 ± 7.48 4.14 ± 11.39 0.74
6-month changes in self-efficacy
Dietary self-efficacy Mean ± SD 5.16 ± 10.07 3.52 ± 9.76 0.17
Physical Activity self-efficacy Mean ± SD 3.84 ± 10.51 1.71 ± 11.76 0.32
12-month changes in self-efficacy
Dietary self-efficacy Mean ± SD 4.89 ± 9.01 0.30 ± 13.69 0.22
Physical Activity self-efficacy Mean ± SD −0.72 ± 7.04 1.80 ± 14.07 0.40
  1. aSD Standard Deviation. Weight changes at 3-, 6- and 12-months are in comparison to baseline weight. Dietary self-efficacy was measured using an 8-item scale [27] with range (0–10) and physical activity self-efficacy was measured using a 5-item scale with range (0–10) [28]
  2. † From Fisher’s exact test; ‡ from logistic regression; the others from Wilcoxon rank sum tests