Effect of Allowing Choice of Diet on Weight Loss: A Randomized Trial.
Ann Intern Med
; 162(12): 805-14, 2015 Jun 16.
Article
em En
| MEDLINE
| ID: mdl-26075751
ABSTRACT
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.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Redução de Peso
/
Comportamento de Escolha
/
Dieta Redutora
/
Obesidade
Tipo de estudo:
Clinical_trials
Limite:
Female
/
Humans
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Male
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Middle aged
Idioma:
En
Ano de publicação:
2015
Tipo de documento:
Article