Changes in eating, physical activity and related behaviors in a primary care-based weight loss intervention

S. Volger, T. A. Wadden, D. B. Sarwer, R. H. Moore, J. Chittams, L. K. Diewald, E. Panigrahi, R. I. Berkowitz, K. Schmitz, M. L. Vetter, Thomas A. Wadden, David B. Sarwer, Robert I. Berkowitz, Jesse Chittams, Lisa Diewald, Shiriki Kumanyika, Renee Moore, Kathryn Schmitz, Adam G. Tsai, Marion VetterSheri Volger, Caroline H. Moran, Jeffrey Derbas, Megan Dougherty, Zahra Khan, Jeffrey Lavenberg, Eva Panigrahi, Joanna Evans, Ilana Schriftman, Dana Tioxon, Victoria Webb, Catherine Williams-Smith, Ronald Barg, Nelima Kute, David Lush, Celeste Mruk, Charles Orellana, Gail Rudnitsky, Angela Monroe, Lisa Anderson, David E. Eberly, Albert H. Fink, Kathleen Malone, Peter B. Nonack, Daniel Soffer, John N. Thurman, Marc J. Wertheimer, Barbara Jean Shovlin, Lanisha Johnson, Jill Esrey, Jeffrey Heit, Barbara C. Joebstl, Oana Vlad, Rose Schneider, Tammi Brandley, Linda Jelinski, Joel Griska, Karen J. Nichols, Edward G. Reis, James W. Shepard, Doris Davis-Whitely, Charin Sturgis, Katherine Fleming, Dana B. Greenblatt, Lisa Schaffer, Tamara Welch, Melissa Rosato, Eugonda Butts, Marta Ortiz, Marysa Nieves, Alethea White, Cassandra Bullard, Jennifer DiMedio, Melanie Ice, Brandt Loev, John S. Potts, Christine Tressel, Iris Perez, Penny Rancy, Dianne Rittenhouse, Joanne Colligan

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

OBJECTIVE: To examine changes in eating behaviors and physical activity, as well as predictors of weight loss success, in obese adults who participated in a 2-year behavioral weight loss intervention conducted in a primary care setting. DESIGN: A longitudinal, randomized controlled, multisite trial. SUBJECTS: Three hundred ninety obese (body mass index, 30-50 kg m-2) adults, ≥21 years, in the Philadelphia region. METHODS: Participants were assigned to one of three interventions: (1) Usual Care (quarterly primary care provider (PCP) visits that included education on diet and exercise); (2) Brief Lifestyle Counseling (quarterly PCP visits plus monthly lifestyle counseling (LC) sessions about behavioral weight control); or (3) Enhanced Brief LC (the previous intervention with a choice of meal replacements or weight loss medication). RESULTS: At month 24, participants in both Brief LC and Enhanced Brief LC reported significantly greater improvements in mean (±s.e.) dietary restraint than those in Usual Care (4.4±0.5, 4.8±0.5 and 2.8±0.5, respectively; both P-values≤0.016). The percentage of calories from fat, along with fruit and vegetable consumption, did not differ significantly among the three groups. At month 24, both the Brief LC and Enhanced Brief LC groups reported significantly greater increases than usual care in energy expenditure (kcal per week) from moderately vigorous activity (+593.4±175.9, +415.4±179.6 and -70.4±185.5 kcal per week, respectively; both P-values≤0.037). The strongest predictor of weight loss at month 6 (partial R2 =33.4%, P<0.0001) and at month 24 (partial R2 =19.3%, P<0.001) was food records completed during the first 6 months. Participants who achieved a 5% weight loss at month 6 had 4.7 times greater odds of maintaining a ≥5% weight loss at month 24. CONCLUSIONS: A behavioral weight loss intervention delivered in a primary care setting can result in significant weight loss, with corresponding improvements in eating restraint and energy expenditure. Moreover, completion of food records, along with weight loss at month 6, is a strong predictor of long-term weight loss.

Original languageEnglish (US)
Pages (from-to)S12-S18
JournalInternational Journal of Obesity
Volume37
Issue numberSUPPL.1
DOIs
StatePublished - Aug 2013

All Science Journal Classification (ASJC) codes

  • Medicine (miscellaneous)
  • Endocrinology, Diabetes and Metabolism
  • Nutrition and Dietetics

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