Abstract 3149: Is Plasma B-type Natriuretic Peptide Measurement Valid for Prediction of Cardiovascular Events in Chronic Kidney Disease? A Community-Based Longitudinal Study
Elevated plasma B-type natriuretic peptide (BNP) levels have been reported to be a marker for risk of cardiovascular events (CVE) including heart failure, coronary artery disease and stroke in the general population. However, plasma BNP is increased by renal dysfunction, and it is therefore not known whether plasma BNP might be a reliable biomarker for predicting onset of CVE in the cohort with impaired renal function as represented by chronic kidney disease (CKD). Baseline data including plasma BNP, serum creatinine, and urine protein were determined in 14265 participants from a community-based population. Estimated glomerular filtration rate (eGFR) was calculated using a modified MDRD equation, and CKD was defined by the following two methods (Def 1 = eGFR<60 ml/min/1.73m2 and/or proteinuria; Def 2 = eGFR<60 ml/min/1.73m2). Numbers of CKD subjects were 1927 according to Def 1 and 1604 according to Def 2. CVE endpoint was surveyed prospectively. The mean follow-up duration was 2.9 years. After adjustment for traditional cardiovascular risk factors and atrial fibrillation, relative risk (RR) for CVE was significantly higher in the highest BNP quartile compared to the lowest BNP quartile according to both definitions (Def 1, RR=3.51, p<0.01: Def 2, RR=4.67, p<0.01) (Figure⇓). Furthermore, the RR for a composite endpoint of CVE and death was also significantly higher in the highest BNP quartile, again by both definitions (Def1, RR=2.71, p<0.01: Def 2, RR=3.09, p<0.02). Measurement of plasma BNP levels provides strong predictive information about future onset of CVE and death, even in CKD subjects selected from the general population.