Dietary fat and body fat: a multivariate study of 205 adult females.

This study examined the association between diet composition, particularly dietary fat intake, and body-fat percentage in 205 adult females. Subjects completed a written questionnaire regarding lifestyle factors, such as exercise participation and smoking, demographic data, and the diet section of the National Cancer Institute's Health Habits and History Questionnaire by Block. Skinfold-thickness measures were used to ascertain the body-fat percentage of each subject. Results showed that intake of dietary fat was related significantly with adiposity, without (F = 13.65, R2 = 0.063, P = 0.0003) and with (F = 8.74, R2 = 0.033, P = 0.0035) control for multiple potential confounding factors: age, total energy intake, total exercise time per week, years of regular physical activity, consumption of other macronutrients, and smoking. Unlike dietary fat intake, protein consumption and carbohydrate intake were not significant individual predictors of body-fat percentage when the potential confounding variables were controlled. The findings suggest that dietary fat intake may play a role in obesity beyond dietary energy content.