• Sara Wilcox, Jihong Liu, Cheryl L Addy, Gabrielle Turner-McGrievy, Judith T Burgis, Ellen Wingard, Alicia A Dahl, Kara M Whitaker, Lara Schneider, and Alycia K Boutté.
• Department of Exercise Science, Arnold School of Public Health, University of South Carolina, Columbia, SC, United States; Prevention Research Center, Arnold School of Public Health, University of South Carolina, Columbia, SC, United States. Electronic address: swilcox@sc.edu.
• Contemp Clin Trials. 2018 Mar 1; 66: 51-63.

BackgroundInterventions to prevent excessive gestational weight gain and promote postpartum weight loss have yielded modest results, particularly in overweight and obese women.ObjectivesTo examine the impact of a theory-based lifestyle intervention on gestational weight gain, postpartum weight loss, and related maternal and child outcomes and to examine race differences in these outcomes.DesignA randomized controlled trial (target N=400; 200 intervention, 200 standard care; 200 African American, 200 white).MethodsOverweight and obese African American and white women ≤16weeks gestation are recruited from obstetrics and gynecology clinics in South Carolina. Intervention participants receive two in-depth counseling sessions (early pregnancy and postpartum), telephone counseling, behavioral podcasts, and social media support that target weight self-monitoring and increasing physical activity and healthy dietary behavior practices, guided by Social Cognitive Theory. Standard care participants receive monthly mailings and a matched number of podcasts on non-weight related topics. All intervention activities last from ≤18weeks gestation to 6months after delivery. Gestational weight gain is the primary outcome. Secondary outcomes are meeting gestational weight gain guidelines (inadequate, adequate, excessive), weekly rate of gestational weight gain, postpartum weight retention, physical activity and dietary behaviors, health-related quality of life, and offspring adiposity. Participants are assessed at baseline (≤16weeks gestation), 32weeks gestation, and 6 and 12months postpartum, and offspring are assessed at 6 and 12months.SummaryHIPP is an innovative study that addresses significant gaps in the literature. Primary outcome results are expected in 2019.Copyright © 2018 Elsevier Inc. All rights reserved.

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