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Effect of Allowing Choice of Diet on Weight Loss: A Randomized Trial.

Publication ,  Journal Article
Yancy, WS; Mayer, SB; Coffman, CJ; Smith, VA; Kolotkin, RL; Geiselman, PJ; McVay, MA; Oddone, EZ; Voils, CI
Published in: Ann Intern Med
June 16, 2015

BACKGROUND: Choosing a diet rather than being prescribed one could improve weight loss. OBJECTIVE: To examine whether offering choice of diet improves weight loss. DESIGN: Double-randomized preference trial of choice between 2 diets (choice) versus random assignment to a diet (comparator) over 48 weeks. (ClinicalTrials.gov: NCT01152359). SETTING: Outpatient clinic at a Veterans Affairs medical center. PATIENTS: Outpatients with a body mass index of at least 30 kg/m2. INTERVENTION: Choice participants received information about their food preferences and 2 diet options (low-carbohydrate diet [LCD] or low-fat diet [LFD]) before choosing and were allowed to switch diets at 12 weeks. Comparator participants were randomly assigned to 1 diet for 48 weeks. Both groups received group and telephone counseling for 48 weeks. MEASUREMENTS: The primary outcome was weight at 48 weeks. RESULTS: Of 105 choice participants, 61 (58%) chose the LCD and 44 (42%) chose the LFD; 5 (3 on the LCD and 2 on the LFD) switched diets at 12 weeks, and 87 (83%) completed measurements at 48 weeks. Of 102 comparator participants, 53 (52%) were randomly assigned to the LCD and 49 (48%) were assigned to the LFD; 88 (86%) completed measurements. At 48 weeks, estimated mean weight loss was 5.7 kg (95% CI, 4.3 to 7.0 kg) in the choice group and 6.7 kg (CI, 5.4 to 8.0 kg) in the comparator group (mean difference, -1.1 kg [CI, -2.9 to 0.8 kg]; P = 0.26). Secondary outcomes of dietary adherence, physical activity, and weight-related quality of life were similar between groups at 48 weeks. LIMITATIONS: Only 2 diet options were provided. Results from this sample of older veterans might not be generalizable to other populations. CONCLUSION: Contrary to expectations, the opportunity to choose a diet did not improve weight loss.

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Published In

Ann Intern Med

DOI

EISSN

1539-3704

Publication Date

June 16, 2015

Volume

162

Issue

12

Start / End Page

805 / 814

Location

United States

Related Subject Headings

  • Weight Loss
  • Quality of Life
  • Patient Preference
  • Patient Compliance
  • Obesity
  • Middle Aged
  • Male
  • Humans
  • Health Knowledge, Attitudes, Practice
  • General & Internal Medicine
 

Citation

APA
Chicago
ICMJE
MLA
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Yancy, W. S., Mayer, S. B., Coffman, C. J., Smith, V. A., Kolotkin, R. L., Geiselman, P. J., … Voils, C. I. (2015). Effect of Allowing Choice of Diet on Weight Loss: A Randomized Trial. Ann Intern Med, 162(12), 805–814. https://doi.org/10.7326/M14-2358
Yancy, William S., Stephanie B. Mayer, Cynthia J. Coffman, Valerie A. Smith, Ronette L. Kolotkin, Paula J. Geiselman, Megan A. McVay, Eugene Z. Oddone, and Corrine I. Voils. “Effect of Allowing Choice of Diet on Weight Loss: A Randomized Trial.Ann Intern Med 162, no. 12 (June 16, 2015): 805–14. https://doi.org/10.7326/M14-2358.
Yancy WS, Mayer SB, Coffman CJ, Smith VA, Kolotkin RL, Geiselman PJ, et al. Effect of Allowing Choice of Diet on Weight Loss: A Randomized Trial. Ann Intern Med. 2015 Jun 16;162(12):805–14.
Yancy, William S., et al. “Effect of Allowing Choice of Diet on Weight Loss: A Randomized Trial.Ann Intern Med, vol. 162, no. 12, June 2015, pp. 805–14. Pubmed, doi:10.7326/M14-2358.
Yancy WS, Mayer SB, Coffman CJ, Smith VA, Kolotkin RL, Geiselman PJ, McVay MA, Oddone EZ, Voils CI. Effect of Allowing Choice of Diet on Weight Loss: A Randomized Trial. Ann Intern Med. 2015 Jun 16;162(12):805–814.

Published In

Ann Intern Med

DOI

EISSN

1539-3704

Publication Date

June 16, 2015

Volume

162

Issue

12

Start / End Page

805 / 814

Location

United States

Related Subject Headings

  • Weight Loss
  • Quality of Life
  • Patient Preference
  • Patient Compliance
  • Obesity
  • Middle Aged
  • Male
  • Humans
  • Health Knowledge, Attitudes, Practice
  • General & Internal Medicine