Skip to main page content
Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Randomized Controlled Trial
. 2013 Sep;21(9):1789-97.
doi: 10.1002/oby.20396. Epub 2013 Jul 2.

The Efficacy of a Daily Self-Weighing Weight Loss Intervention Using Smart Scales and E-Mail

Free PMC article
Randomized Controlled Trial

The Efficacy of a Daily Self-Weighing Weight Loss Intervention Using Smart Scales and E-Mail

Dori M Steinberg et al. Obesity (Silver Spring). .
Free PMC article


Objective: To examine the impact of a weight loss intervention that focused on daily self-weighing for self-monitoring as compared to a delayed control group among 91 overweight adults.

Design and methods: The 6-month intervention included a cellular-connected "smart" scale for daily weighing, web-based weight loss graph, and weekly e-mails with tailored feedback and lessons. An objective measure of self-weighing frequency was obtained. Weight was measured in clinic at 3 and 6 months. Caloric intake and expenditure, and perceptions of daily self-weighing were also measured.

Results: Using intent-to-treat analyses, the intervention group lost significantly more weight compared to the control group [mean (95% CI); 3 months: -4.41% (-5.5, -3.3) vs. -0.37% (-1.5, 0.76); 6 months: -6.55% (-7.7, -5.4) vs. -0.35% (-1.5, 0.79); group × time interaction: P < 0.001] and a greater percentage achieved 5% (42.6% vs. 6.8%; P < 0.0001) and 10% (27.7% vs. 0%; P < 0.0001) weight loss. On average, the intervention group self-weighed more days/week (6.1 ± 1.1 vs. 1.1 ± 1.5; P < 0.0001) and consumed fewer calories/day compared to the control group [mean (95% CI); 6 months: 1,509 (1,291, 1,728) vs. 1,856 (1,637, 2,074); group × time interaction: P = 0.006]. Among intervention participants, daily self-weighing was perceived positively.

Conclusions: These results indicate that an intervention focusing on daily self-weighing can produce clinically significant weight loss.

Conflict of interest statement

Conflict of Interest Statement

The authors have no conflict of interest to disclose.


Figure 1
Figure 1
Study Enrollment and Retention Diagram
Figure 2
Figure 2
Average Days Weighed Each Week by Study Group (n=91)
Figure 3
Figure 3
Average Percent Weight Loss Over Time by Group [Mean (95%CI)] (n=91)

Similar articles

See all similar articles

Cited by 75 articles

See all "Cited by" articles


    1. Flegal KM, Carroll MD, Kit BK, Ogden CL. Prevalence of obesity and trends in the distribution of body mass index among US adults: 1999–2010. JAMA. 2012;307(5):491–497. - PubMed
    1. Field AE, Coakley EH, Must A, et al. Impact of overweight on the risk of developing common chronic diseases during a 10-year period. Archives of Internal Medicine. 2001;161(13):1581. - PubMed
    1. Wolin KY, Carson K, Colditz GA. Obesity and Cancer. The oncologist. 2010;15(6):556. - PMC - PubMed
    1. Wing RR, Koeske R, Epstein LH, Nowalk MP, Gooding W, Becker D. Long-term effects of modest weight loss in type II diabetic patients. Archives of Internal Medicine. 1987;147(10):1749. - PubMed
    1. Stevens VJ, Corrigan SA, Obarzanek E, et al. Weight loss intervention in phase 1 of the Trials of Hypertension Prevention. Archives of Internal Medicine. 1993;153(7):849. - PubMed

Publication types