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J Am Diet Assoc. 1998 Jan;98(1):35-9.

Lower fat intake as a predictor of initial and sustained weight loss in obese subjects consuming an otherwise ad libitum diet.

Author information

1
Department of Community Health, University of Auckland, New Zealand.

Abstract

OBJECTIVE:

To determine what predicts initial and sustained weight loss in subjects consuming a reduced-fat diet ad libitum and the relationship between achieved level of fat intake and weight loss.

DESIGN:

Placebo arm of a randomized, controlled trial of a weight-loss drug (dexfenfluramine) in the context of an ad libitum, reduced-fat diet.

SUBJECTS:

Thirty-nine subjects (initial mean body mass index +/- standard deviation = 34.9 +/- 3.4; body mass index is calculated as kg/m2) from the placebo group who completed the 9-month study.

INTERVENTION:

Dietary assessment and education (month 0) followed by monthly meetings during the single intervention of reducing fat intake (months 1 through 6); one follow-up at 9 months.

MAIN OUTCOME MEASURES:

Initial weight loss (first 3 months) and sustained weight loss (over 9-month period).

STATISTICS:

Dietary intake, body size, exercise levels, age, and gender were included in multiple regression linear models of initial and sustained weight loss if they were significant independent predictors.

RESULTS:

Greater initial weight loss was associated with a greater decrease in fat intake and a lower achieved fat intake at 3 months. Greater sustained weight loss was associated with a lower achieved fat intake, a higher baseline waist circumference, and higher moderate-intensity exercise levels (months 3 and 6). Weight loss occurred in all subjects who reported a fat intake of 40 g/day or less.

APPLICATIONS:

The obese persons most likely to achieve and sustain weight loss on an ad libitum, reduced-fat diet are those who can substantially reduce fat intake, those with high initial levels of abdominal fat, and those who undertake regular moderate-intensity exercise. A target of less than 40 g fat per day might be an appropriate goal to ensure weight loss, but dietary underreporting and the difficulty of sustaining very-low-fat intakes need to be considered.

PMID:
9434648
DOI:
10.1016/s0002-8223(98)00011-x
[Indexed for MEDLINE]

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