Abstract
The present study evaluated the association of two measures of diet quality with BMI and waist circumference (WC), overall and by education level, among Mexican men and women. We constructed two a priori indices of diet quality, the Mexican Diet Quality Index (MxDQI) and the Mexican Alternate Healthy Eating Index (MxAHEI), which we examined relative to BMI and WC. We computed sex-specific multivariable linear regression models for the total sample and by education level. Mexico. Mexican men (n 954) and women (n 1356) participating in the Mexican National Health and Nutrition Survey 2012. Total dietary scores were not associated with BMI in men and women, but total MxDQI was inversely associated with WC in men (-0·10, 95 % CI -0·20, -0·004 cm). We also found that some results differed by education level in men. For men with the lowest education level, a one-unit increase in total MxDQI and MxAHEI score was associated with a mean reduction in BMI of 0·11 (95 % CI -0·18, 0·04) and 0·18 (95 % CI -0·25, -0·10) kg/m2, respectively. Likewise, a one-unit increase in total MxDQI and MxAHEI score was associated with a mean change in WC of -0·30 (95 % CI -0·49, -0·11) and -0·53 (95 % CI -0·75, -0·30) cm, respectively, in men with the lowest level of education. In women, the association of diet quality scores with BMI and WC was not different by education level. Our findings suggest that a higher diet quality in men with low but not high education is associated with lower BMI and WC.
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