Abstract P120: Relationship of Lipoproteins With Cardiovascular Disease in Persons With Chronic Kidney Disease

Introduction: Chronic kidney disease (CKD) is associated with dyslipidemia (particularly elevated triglycerides [TG] and reduced HDL-cholesterol [HDL-C]) and increased risk of atherosclerotic cardiovascular disease (CVD). However, the association between lipoprotein measures and CVD events in CKD is not well defined. Hypothesis: We hypothesize that high TG and low HDL-C are associated with increased risk for CVD (myocardial infarction [MI] and ischemic stroke) in CKD. Methods: The Chronic Renal Insufficiency Cohort (CRIC) is a prospective study of adults with CKD. We compared tertiles of TG, total cholesterol (TC), VLDL-cholesterol (VLDL-C), LDL-cholesterol (LDL-C), HDL-C, apolipoprotein B (apoB), and apolipoprotein A-I (apoA-I) with risk for MI and ischemic stroke using Fine and Gray methods with death as a competing risk. The lowest tertile was used as the reference category except for HDL-C and apoA-I, in which the highest tertile was used. In secondary analyses, we excluded participants with previous MI or stroke. Results: Among 3811 participants (55% men, 42% Caucasian) with mean age 57.7±11.0 years, 351 had an MI, 132 had an ischemic stroke, and 963 died over a median follow-up of 7.9 years. After adjusting for potential confounders, the hazard ratio (HR, 95% CI) for CVD was 1.04 (0.80-1.34) for high LDL-C, 1.31 (1.01-1.69) for high TG, 1.33 (1.04-1.70) for high VLDL-C, 1.30 (1.01-1.68) for high apoB, 1.65 (1.25-2.17) for low HDL-C, and 1.31 (1.01-1.70) for low apoA-I. In secondary analyses of 2751 participants with no CVD history, high TG (HR 1.46, 1.02-2.10), high VLDL-C (HR 1.56, 1.08-2.25), low HDL-C (HR 2.11, 1.40-3.16) and low apoA-I (HR 2.28, 1.54-3.37) were significantly associated with incident CVD. Conclusions: While high LDL-C is associated with increased CVD risk in the general population, we found no such association in CKD. Instead, high TG, high VLDL-C, low HDL-C and low apoA-I levels show strong associations with increased CVD risk and incident CVD events in CKD.