The Comparison of a Technology‐Based System and an In‐Person Behavioral Weight Loss Intervention
Open accessAbstract
The purpose of this study was to compare a technology‐based system, an in‐person behavioral weight loss intervention, and a combination of both over a 6‐month period in overweight adults. Fifty‐one subjects (age: 44.2 ± 8.7 years, BMI: 33.7 ± 3.6 kg/m 2) participated in a 6‐month behavioral weight loss program and were randomized to one of three groups: standard behavioral weight loss (SBWL), SBWL plus technology‐based system (SBWL+TECH), or technology‐based system only (TECH). All groups reduced caloric intake and progressively increased moderate intensity physical activity. SBWL and SBWL+TECH attended weekly meetings. SBWL+TECH also received a TECH that included an energy monitoring armband and website to monitor energy intake and expenditure. TECH used the technology system and received monthly telephone calls. Body weight and physical activity were assessed at 0 and 6 months. Retention at 6 months was significantly different (P = 0.005) between groups (SBWL: 53%, SBWL+TECH: 100%, and TECH: 77%). Intent‐to‐treat (ITT) analysis revealed significant weight losses at 6 months in SBWL+TECH (−8.8 ± 5.0 kg, −8.7 ± 4.7%), SBWL (−3.7 ± 5.7 kg, −4.1 ± 6.3%), and TECH (−5.8 ± 6.6 kg, −6.3 ± 7.1%) (P < 0.001). Self‐report physical activity increased significantly in SBWL (473.9 ± 800.7 kcal/week), SBWL+TECH (713.9 ± 1,278.8 kcal/week), and TECH (1,066.2 ± 1,371 kcal/week) (P < 0.001), with no differences between groups (P = 0.25). The TECH used in conjunction with monthly telephone calls, produced similar, if not greater weight losses and changes in physical activity than the standard in‐person behavioral program at 6 months. The use of this technology may provide an effective short‐term clinical alternative to standard in‐person behavioral weight loss interventions, with the longer term effects warranting investigation.
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Another study had a large disparity in loss to follow-up between groups, with 47% loss in the control group compared with 11.7% loss in the intervention group.
“another study [43] had a large disparity in loss to follow-up between groups, with 47% loss in the control group compared with 11.7% loss in the intervention group.”
From Consumer-based wearable activity trackers increase physical activity participation: systematic review and meta-analysis (2019) · cites this paper as [43]
The Discussion reports 47% attrition in the standard group. The Results report three groups, not a single intervention group: retention was 53% for SBWL, 100% for SBWL+TECH, and 77% for TECH. An approximately 11.7% loss can be calculated by pooling the two technology groups, but the paper does not report it as the loss rate of one intervention group. (LLM, conf=0.88)
Experimental — accuracy not yet measuredBlinding of outcome assessors (detection bias) was assessed as high risk for 7 studies [31,43,45-48,52] because of the use of subjective outcome measures.
“Blinding of outcome assessors (detection bias) was assessed as high risk for 7 studies [31,43,45-48,52] because of the use of subjective outcome measures.”
From Consumer-based wearable activity trackers increase physical activity participation: systematic review and meta-analysis (2019) · cites this paper as [43]
8 studies included more than 1 intervention group.
“Overall, 8 studies included more than 1 intervention group [34,43,45-47,52-54].”
From Consumer-based wearable activity trackers increase physical activity participation: systematic review and meta-analysis (2019) · cites this paper as [43]
17 studies specified that participants must have regular access to the internet, a computer, tablet, and/or smartphone.
“Furthermore, 17 studies specified that the participant must have regular access to the internet, a computer, tablet, and/or smartphone [21,30,33,35-37,39,41-47,51-53]”
From Consumer-based wearable activity trackers increase physical activity participation: systematic review and meta-analysis (2019) · cites this paper as [43]
Eight studies that reported physical activity outcome measures had greater than 20% loss to follow-up, with three of these reporting a reduction in physical activity participation.
“In addition, 8 studies [29,32,33,37,42,43,46,48] that reported physical activity outcome measures had greater than 20% loss to follow-up, with 3 of these studies reporting a reduction in physical activity participation.”
From Consumer-based wearable activity trackers increase physical activity participation: systematic review and meta-analysis (2019) · cites this paper as [43]
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References 29 · Cited by 155
- Authors
- Pellegrini, C. A., Verba, S. D., Otto, A. D., Helsel, D. L., Davis, K. K., & Jakicic, J. M.
- Affiliations
- University of Pittsburgh (US)
- Corresponding author
- Pellegrini, Christine A.
- Venue
- Obesity
- Publisher
- Wiley
- Published
- 2012-02
- Volume
- 20
- Issue
- 2
- Pages
- 356-363
- ISSN
- 1930-7381 (ISSN-L)
- 1930-739X
- PMC
- PMC3753800
- OpenAlex
- W2009938297
- Cited by
- 155
- References
- 29
- Citations by year
- 2026: 1 · 2025: 6 · 2024: 5 · 2023: 7 · 2022: 4 · 2021: 12 · 2020: 13 · 2019: 18 · 2018: 17 · 2017: 18 · 2016: 17 · 2015: 10 · 2014: 11 · 2013: 6 · 2012: 7
- FWCI
- 16.03
- Type
- journal article
- Language
- en
- Open access
- green
- europepmc.org
- Locations
- Obesity (publishedVersion)
- PubMed (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- Funders
- National Institutes of Health (5p30dk046204-15)
- National Institute of Diabetes and Digestive and Kidney Diseases (DK 46204, P30-DK046204)
- Topics
- Health Sciences › Health Professions › General Health Professions › Mobile Health and mHealth Applications
- Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Obesity, Physical Activity, Diet
- Health Sciences › Medicine › Physiology › Physical Activity and Health
- Keywords
- weight loss interventions, behavioral weight loss, technology-based interventions, telephone coaching, overweight adults, physical activity, energy intake
- MeSH terms
- Adult, Behavior Therapy, Energy Intake, Combined Modality Therapy, Female, Humans, Male, Obesity, United States, Weight Loss, Exercise, Outcome Assessment, Health Care, Internet, Risk Reduction Behavior, Weight Reduction Programs
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