Abstract | BACKGROUND: The effects of dietary composition on weight loss are incompletely understood. In addition to energy intake, fiber intake, energy density, macronutrient composition, and demographic characteristics have all been suggested to contribute to weight loss. OBJECTIVE: METHODS: Data were randomly partitioned to a training data set (70%) in which the effects of fiber and other weight-loss predictors were identified using adjusted Least Absolute Shrinkage and Selection Operator and model averaging. The retained predictors were then fit on the testing data set to assess predictive performance. RESULTS: Three hundred and forty-five participants (53.9% female) provided dietary records at baseline and 6 mo. Mean ± SD age and BMI for the full sample was 52.5 ± 8.7 y and 32.6 ± 3.9 kg/m2, respectively. Mean ± SD (99% CI) weight change at 6 mo for the full sample was -7.27 ± 5.6 kg (-8.05, -6.48 kg). The final, best fit model (R2 = 0.41) included fiber, energy density, fat, age, adherence, baseline weight, race, and changes from baseline in carbohydrate, fiber, PUFA, and MUFA intake, but the most influential predictor was fiber intake ($\hat{\beta }$ = -0.37; P < 0.0001). In addition, fiber was strongly associated with adherence to the macronutrient prescriptions (P < 0.0001). Interactions between race and adherence, age, baseline weight, carbohydrate, energy density, and MUFAs were also retained in the final model. CONCLUSION:
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Authors | Derek C Miketinas, George A Bray, Robbie A Beyl, Donna H Ryan, Frank M Sacks, Catherine M Champagne |
Journal | The Journal of nutrition
(J Nutr)
Vol. 149
Issue 10
Pg. 1742-1748
(10 01 2019)
ISSN: 1541-6100 [Electronic] United States |
PMID | 31174214
(Publication Type: Journal Article, Research Support, N.I.H., Extramural)
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Copyright | Copyright © American Society for Nutrition 2019. |
Chemical References |
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Topics |
- Adult
- Caloric Restriction
- Dietary Fiber
(administration & dosage)
- Female
- Humans
- Male
- Middle Aged
- Overweight
(diet therapy)
- Patient Compliance
- Weight Loss
(drug effects)
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