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

Table 3 Changes in Weight and Self-Efficacy by Arm

	GEM (Phase 1 and Phase 2) n = 21	EUC n = 22	p-value
Weight
3-month weight changes
3-month weight change (kg) Mean ± SD^a	−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 ± SD^a	−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 ± SD^a	−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 ± SD^a	6.38 ± 8.92	3.81 ± 11.63	0.23
Physical activity self-efficacyMean ± SD^a	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

^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]
† From Fisher’s exact test; ‡ from logistic regression; the others from Wilcoxon rank sum tests

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