GI was directly associated with age, waist and BMI z-scores, energy, fibre and carbohydrate intake (r: from 0.080 to 0.238, P < 0.001), and negatively with fat intake (r: −0.060, P < 0.0001). [...] GI was associated with BMI and waist z-scores independently of age, sex, parental overweight/obesity, parental education, and energy intake, protein, fat, carbohydrate, fibre and GL residuals.
|Table 1. Characteristics of the population: comparison across |
glycaemic index quartiles. (Barba. 2010)
In particular, GI was the sole nutritional factor among those under investigation, significantly associated with waist circumference.So you better not buy those carb-loaden low-fat foods if you want to preserve a healthy body composition and a presentable mid-section. If you are a parent, pay special attention to all those fat-free foods specifically marketed for children - most are 100% plain sugar (or what is in spite of its low GI even worse: fructose)!
Controlling for covariates, the risk of overweight/obesity or of central fat distribution was almost two-folds higher in the upper quartile in comparison to the lowest quartile of dietary GI [cf. Table 1].