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Dietary Patterns during Lactation and Postpartum Weight Loss: A Systematic Review
Sharon Donovan, PhD, RD, Kathryn Dewey, PhD, Rachel Novotny, PhD, RDN, LD, Jamie Stang, PhD, MPH, RD, Elsie Taveras, MD, MPH, Ronald Kleinman, MD, Ramkripa Raghavan, DrPH, MPH, MSc, Julie Nevins, PhD, Sara Scinto-Madonich, MS, Julia H. Kim, PhD, MPH, RD, Nancy Terry, MS, MLS, Gisela Butera, MLIS, MEd, and Julie Obbagy, PhD, RD.
Author Information and AffiliationsAlexandria (VA): USDA Nutrition Evidence Systematic Review; 2020 Jul.
TECHNICAL ABSTRACT
Background
- This important public health question was identified by the U.S. Departments of Agriculture (USDA) and Health and Human Services (HHS) to be examined by the 2020 Dietary Guidelines Advisory Committee.
- The 2020 Dietary Guidelines Advisory Committee, Pregnancy and Lactation Subcommittee conducted a systematic review to answer this question with support from the Nutrition Evidence Systematic Review (NESR) team.
- The goal of this systematic review was to examine the following question: What is the relationship between dietary patterns consumed during lactation and postpartum weight loss?
Conclusion statement and grade
- Insufficient evidence is available to determine the relationship between dietary patterns during lactation and postpartum weight loss. (Grade: Grade not assignable)
Methods
- A literature search was conducted using four databases (PubMed, Cochrane, Embase, and CINAHL) to identify articles that evaluated the intervention or exposure of dietary patterns during lactation and the outcome of postpartum weight loss, defined as change in weight from baseline (postpartum) to a later time point during the postpartum period. Postpartum weight retention was also considered as an outcome when gestational weight gain was accounted for. A manual search was conducted to identify articles that may not have been included in the electronic databases searched. Articles were screened by two NESR analysts independently for inclusion based on pre-determined criteria.
- Data extraction and risk of bias assessment were conducted for each included study, and both were checked for accuracy. The Committee qualitatively synthesized the body of evidence to inform development of a conclusion statement(s), and graded the strength of evidence using pre-established criteria for risk of bias, consistency, directness, precision, and generalizability.
Summary of the evidence
- This systematic review includes one randomized controlled trial (RCT) conducted in the U.S., which compared postpartum weight loss (PPWL) between lactating women who were randomized to a Mediterranean-style diet vs. the USDA MyPyramid diet.
- The two groups showed no significant differences in PPWL.
- This study had notable limitations, including high attrition (approximately 21 percent), issues with implementation of the intervention, and lack of blinding of participants and investigators.
Contents
FUNDING SOURCE: United States Department of Agriculture, Food and Nutrition Service, Center for Nutrition Policy and Promotion, Alexandria, VA
Suggested citation:
Donovan S, Dewey K, Novotny R, Stang J, Taveras E, Kleinman R, Raghavan R, Nevins J, Scinto-Madonich S, Kim JH, Terry N, Butera G, Obbagy J. Dietary Patterns during Lactation and Postpartum Weight Loss: A Systematic Review. July 2020. U.S. Department of Agriculture, Food and Nutrition Service, Center for Nutrition Policy and Promotion, Nutrition Evidence Systematic Review. Available at: https://doi.org/10.52570/NESR.DGAC2020.SR0202
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Related citation: Dietary Guidelines Advisory Committee. Scientific Report of the 2020 Dietary Guidelines Advisory Committee: Advisory Report to the Secretary of Agriculture and the Secretary of Health and Human Services. July 2020. U.S. Department of Agriculture, Agricultural Research Service. Available at: https://doi.org/10.52570/DGAC2020
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