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Department of Human Ecology, The University
of Texas at Austin, 1 University Station
A2700, Austin, TX 78712, USA.
OBJECTIVES:
To assess differences in dietary intake of
overweight/obese subjects and sex-, age-,
and height-matched controls and to identify
dietary components associated with increased
deposition of body fat. DESIGN/SUBJECTS:
A convenience sample of 52 overweight/obese
and 52 normal-weight adults matched for sex,
age (+/-1 year), and height (+/-1 inch) were
recruited from the local area. Dietary intake
was assessed with the Block 60-item food
frequency questionnaire, physical activity
was measured by the Yale Physical Activity
Survey, and percent body fat was measured
via dual-energy x-ray absorptiometry.
STATISTICAL
ANALYSES PERFORMED: Independent t tests compared
between-group consumption of dietary components.
The ability of dietary components to predict
percent body fat before and after controlling
for age-, sex-, and physical activity-related
energy expenditure and other macronutrients
was assessed with multiple regression analyses.
Spearman correlation coefficients examined
relationships among nutrients, Food Guide
Pyramid servings, and percent body fat.
RESULTS:
Overweight/obese subjects consumed more total
fat, saturated fat, and cholesterol and less
carbohydrate, complex carbohydrate, and dietary
fiber than control subjects. Reported intake
of dietary fiber was inversely related to
percent body fat without (R(2)=0.052, P=0.02)
and with (R(2)=0.045, P=0.013) control for
potential confounding factors. Servings of
fruit per day were negatively related to
percent body fat (r=-0.40, P<0.01).
CONCLUSIONS:
These findings suggest that the
composition of a diet, especially low dietary
fiber and fruit intake, plays a role in the
etiology of obesity.
PMID: 16720124 [PubMed - indexed for MEDLINE] |
