Effects of an abbreviated obesity intervention supported by mobile technology: The ENGAGED randomized clinical trial

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Abstract

Objective: To determine the effects on weight loss of three abbreviated behavioral weight loss interventions with and without coaching and mobile technology. Methods: A randomized controlled efficacy study of three 6-month weight loss treatments was conducted in 96 adults with obesity: 1) self-guided (SELF), 2) standard (STND), or 3) technology-supported (TECH). STND and TECH received eight in-person group treatment sessions. SELF and STND used paper diaries to self-monitor diet, activity, and weight; TECH used a smartphone application with social networking features and wireless accelerometer. Results: Weight loss was greater for TECH and STND than SELF at 6 months (−5.7 kg [95% confidence interval: −7.2 to −4.1] vs. −2.7 kg [95% confidence interval: −5.1 to −0.3], P < 0.05) but not 12 months. TECH and STND did not differ except that more STND (59%) than TECH (34%) achieved ≥ 5% weight loss at 6 months (P < 0.05). Self-monitoring adherence was greater in TECH than STND (P < 0.001), greater in both interventions than SELF (P < 0.001), and covaried with weight loss (r(84) = 0.36-0.51, P < 0.001). Conclusions: Abbreviated behavioral counseling can produce clinically meaningful weight loss regardless of whether self-monitoring is performed on paper or smartphone, but long-term superiority over standard of care self-guided treatment is challenging to maintain.

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Spring, B., Pellegrini, C. A., Pfammatter, A., Duncan, J. M., Pictor, A., McFadden, H. G., … Hedeker, D. (2017). Effects of an abbreviated obesity intervention supported by mobile technology: The ENGAGED randomized clinical trial. Obesity, 25(7), 1191–1198. https://doi.org/10.1002/oby.21842

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