The relationship between pretreatment dietary composition and weight loss during a randomised trial of different diet approaches.

Published

Journal Article

BACKGROUND: Identifying pretreatment dietary habits that are associated with weight-loss intervention outcomes could help guide individuals' selection of weight-loss approach among competing options. A pretreatment factor that may influence weight-loss outcomes is macronutrient intake. METHODS: Overweight and obese Durham Veterans Affairs outpatients were randomised to a weight-loss intervention with a low-carbohydrate diet (n = 71) or orlistat medication therapy plus a low-fat diet (n = 73). Percentage fat, carbohydrate and protein intake prior to treatment were measured using 4-day food records. Linear mixed-effects models were used to determine whether pretreatment percentage macronutrient intake influenced weight trajectories and weight loss in each weight-loss condition. RESULTS: Participant's mean age was 53 years, baseline body mass index was 39.3 kg m(-2) and 72% were male. A higher pretreatment percentage carbohydrate intake was associated with less rapid initial weight loss (P = 0.02) and less rapid weight regain (P = 0.03) in the low-carbohydrate diet condition but was not associated with weight trajectories in the orlistat plus low-fat diet condition. In both conditions, a higher pretreatment percentage fat intake was associated with more rapid weight regain (P < 0.01). Pretreatment percentage protein intake was not associated with weight trajectories. None of the pretreatment macronutrients were associated with weight loss on study completion in either condition. CONCLUSIONS: Selection of a weight-loss approach on the basis of pretreatment macronutrient intake is unlikely to improve weight outcomes at the end of a 1-year treatment. However, pretreatment macronutrient intake may have implications for tailoring of interventions to slow weight regain after weight loss.

Full Text

Duke Authors

Cited Authors

  • McVay, MA; Jeffreys, AS; King, HA; Olsen, MK; Voils, CI; Yancy, WS

Published Date

  • February 2015

Published In

Volume / Issue

  • 28 Suppl 2 /

Start / End Page

  • 16 - 23

PubMed ID

  • 24251378

Pubmed Central ID

  • 24251378

Electronic International Standard Serial Number (EISSN)

  • 1365-277X

Digital Object Identifier (DOI)

  • 10.1111/jhn.12188

Language

  • eng

Conference Location

  • England