Background: This study sought to explore the relationship between cystatin C (CysC) and anthropometric measures of obesity and the influence of this association on mortality [cardiovascular disease (CVD), coronary heart disease, and all-cause] in a nationally representative population free of CVD, diabetes mellitus, and macroalbuminuria (MA).
Methods: The study cohort included 4577 adult participants of the Third National Health and Nutrition Examination Survey (NHANES). Spearman correlation analysis was performed to ascertain the association between various anthropometric measures and CysC. Formal statistical analyses of the interaction term between anthropometric measures and CysC for outcomes were performed followed by stratified multivariate Cox proportional hazard analyses.
Results: A moderate degree of association was seen between CysC and measures of visceral adiposity as represented by waist-to-height ratio (WHR) and waist circumference (WC) and only a weak association between CysC and body mass index (BMI). CysC was predictive of all study outcomes in individuals with normal anthropometric measurements only.
Conclusions: CysC correlated better with measures of visceral adiposity (WC and WHR) compared to BMI and appears to be a better predictor of adverse cardiovascular outcomes among those with anthropometric measures not suggestive of obesity compared to those with abnormal measures of anthropometry.
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