Background:

studies have shown an association between obesity and a reduction in estimated glomerular filtration rate (eGFR). However, little is known regarding whether this association is related to total fat or, more specifically, to central or visceral fat.

Objective:

this study evaluated the correlations among the nutritional indices that measure total, central and visceral obesity with eGFR.

Methods:

a cross-sectional study, involving 288 hypertensive patients. Kidney function was estimated by GFR, using the Modification of Diet in Renal Disease (MDRD) and Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equations. Explanatory variables included body mass index (BMI), waist circumference (WC), waist-hip ratio (WHR), waist stature ratio (WSR), estimated visceral adipose tissue (eVAT) and body fat percentage (BF%).

Results:

the mean BMI was 27.8 ± 4.7 kg/m². Most of the patients (68.1%) were in the normal range of BF%, but regarding WC and eVAT, they were at very high risk (58.3% and 64.6%, respectively). In men, there were no correlations between nutritional indices and eGFR. In women, only eVAT remained negatively correlated with eGFR, estimated by MDRD and CKD-EPI equations, independent of BMI, smoking, physical inactivity, blood pressure, glycated hemoglobin, LDL and HDL cholesterol, uric acid and microalbuminuria.

Conclusions:

the majority of obesity indices were not associated with eGFR. Only eVAT was negatively associated with eGFR by MDRD and CKD-EPI equations in hypertensive women. In primary health care, visceral adipose tissue estimation could support the identification of hypertensive women at increased risk for developing chronic kidney disease.

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