Dietary Fiber Intake and Body Fat Gain: A Prospective Cohort Study of Middle-Aged Women Dietary Fiber Intake and Body Fat Gain: A Prospective Cohort Study of Middle-Aged Women
Design/ Subjects: Prospective cohort design with baseline and follow-up assessments 20 months apart and 252 middle-aged women (40.1Â±3.0 y). Diet, particularly caloric and fiber intake, was measured using 7-day weighed food records. Body fat was assessed via the Bod Pod, and PA was measured objectively using MTI accelerometers over seven consecutive days.
Statistical Analysis: Changes in weight, BF%, and fiber intake were calculated by subtracting baseline measurements from those taken at 20 months. Regression analysis was used to determine the extent to which baseline fiber intake/1000 kcal and changes in fiber intake/1000 kcal were predictive of changes in body weight and BF%. Partial correlation was employed to ascertain the effect of controlling for each of the potential confounding variables on the fiber and body composition associations.
Results: Across the study, there were significant changes in all variables. For every increase of one gram of fiber/1000 kcal consumed, weight decreased by 0.55 lb (P=0.0061) and BF% decreased by 0.25 percentage point (P=0.0052). Baseline fiber intake/1000 kcal was not predictive of changes in body weight or BF% over the 20 month period.
Conclusions: Increasing dietary fiber intake may be an effective means of weight management in middle-aged women.
School:Brigham Young University
School Location:USA - Utah
Source Type:Master's Thesis
Keywords:dietary fiber body fat
Date of Publication:04/23/2007