Elevated High Sensitivity C-Reactive Protein Increases the Risk of Microalbuminuria in Subjects With Cardiovascular Disease Risk Factors.

Microalbuminuria is an early biomarker of kidney injury, the aim of this study was to investigate the impact of high sensitivity C-reactive protein (hs-CRP) on microalbuminuria in adults with cardiovascular disease (CVD) risk factors. A total of 5667 subjects who voluntarily attended annual health screenings in the Third Xiangya Hospital of Central South University were included in the study. Logistic regression was used to determine the validity of hs-CRP to predict the presence of microalbuminuria. In the unadjusted regression analysis, male gender (OR 2.23), age (OR 1.71), smoking status (OR 1.48), obesity (OR 2.41), hypertension(OR 4.03), diabetes (OR 4.61), hyperuricemia (OR 1.83), and high hs-CRP(OR 1.61) were associated with microalbuminuria. Multivariate logistic regression analysis showed that the adjusted odds ratios (OR) of diabetes, hypertension, male, abdominal obesity, and high hs-CRP for microalbuminuria were 2.71, 2.57, 1.51, 1.28 and 1.41 in all subjects, respectively (P < 0.01). ROC analysis indicated that the cut-off for hs-CRP with better properties for screening of microalbuminuria was identified as ≥0.85 mg/L. The ORs of microalbuminuria were 1.97, 1.49, 1.32 and 1.71 times in male, abdominal obesity, diabetes and hypertension subjects with hs-CRP ≥ 0.85 mg/L, respectively, compared with those without elevated hs-CRP (P < 0.01). Elevated hs-CRP level was associated with microalbuminuria independent of cardiovascular risk factors. In addition, elevated hs-CRP increased the risk of developing microalbuminuria in subjects with CVD risk factors, indicating that chronic inflammation could amplify the deterioration of kidney by effect of CVD risk factors.