The effectiveness of an online intervention in preventing excessive gestational weight gain: The e-moms roc randomized controlled trial

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Abstract

Background: Excessive gestational weight gain (GWG) is common and contributes to the development of obesity in women and their offspring. Electronic or e-health interventions have the potential to reach large groups of women and prevent excessive GWG, but their effectiveness has not been demonstrated. The purpose of this study was to evaluate, in a real-world setting, the effectiveness of a self-directed, integrated online and mobile phone behavioral intervention in preventing excessive GWG. Methods: This effectiveness trial was a double-blind, three-arm trial with a parallel group design. Two arms received the same e-health intervention during pregnancy with the third arm serving as the placebo control. The intervention was based on a previously efficacious non-digital intervention that was adapted to electronic format. It included three behavior change tools: a weight gain tracker, and separate diet and physical activity goal-setting and self-monitoring tools. Both treatment conditions received access to informational tools, event reminders, and a blogging feature. Healthy pregnant women age 18-35years with body mass indexes (BMI) ≥18.5 and<35, at ≤20weeks gestation, and an e-mail address were eligible. The proportion of women with excessive total GWG, as defined by the Institute of Medicine (IOM), was the primary outcome. 1689 randomized women were analyzed in the intent-to-treat (ITT) analysis. The study was designed to have 87% power to detect a 10 percentage point reduction from a control rate of 55% with a sample of 1641 (p=0.0167, two-sided). Results: In the ITT sample, 48.1% (SD=2.0%) gained excessively in the intervention group as did 46.2% (SD=2.4%) in the placebo control group. These proportions were not significantly different (RR 1.09; 95% CI 0.98, 1.20, p=0.12). The results were not altered in several sensitivity analyses. Conclusion: The addition of three behavior change tools to an informational placebo control did not result in a difference in the proportion of women with excessive total GWG compared to the placebo control in this effectiveness trial of an online, self-directed intervention. The similarity of intervention and control treatments and low usage of the behavior change tools in the intervention group are possible explanations.

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CITATION STYLE

APA

Olson, C. M., Groth, S. W., Graham, M. L., Reschke, J. E., Strawderman, M. S., & Fernandez, I. D. (2018). The effectiveness of an online intervention in preventing excessive gestational weight gain: The e-moms roc randomized controlled trial. BMC Pregnancy and Childbirth, 18(1). https://doi.org/10.1186/s12884-018-1767-4

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