Association of serum lipid indices with large artery atherosclerotic stroke

Background: Low-density lipoprotein cholesterol (LDL) is the primary lipid target for vascular risk reduction in stroke patients, but emerging data suggest that other lipid indices may better predict vascular hazard. We evaluated the relationship between several measures of the classically obtained serum lipid panel and the occurrence of large artery atherosclerotic stroke. Methods: Data prospectively collected over a 4-year period on subjects admitted with ischemic stroke or TIA to a university medical center were analyzed. Independent associations of fasting serum lipid indices with large artery atherosclerotic (LAA) stroke mechanism were evaluated. Results: Of 1,049 patients, 247 (23.5%) were classified with LAA, 224 (21.4%) were classified with small vessel disease (SVD), and 578 (55%) were non-LAA, non-SVD subtype. Lipid levels were similar between LAA and SVD patients. Total cholesterol, triglycerides, LDL, non-high-density lipoprotein cholesterol (HDL), and triglyceride: HDL ratio were significantly higher in LAA vs non-LAA, non-SVD patients. After adjustment for age, hypertension, diabetes, smoking, body mass index, and premorbid statin use, significant odds ratios (ORs) for LAA compared with all other ischemic stroke subtypes for patients in the uppermost lipid quartiles (vs lowest) were triglycerides (OR 2.69, 95% CI 1.44 to 5.02) and non-HDL (OR 2.39, 95% CI 1.40 to 4.11). LDL was not associated with LAA. Conclusions: Compared with all other ischemic stroke subtypes, elevated levels of serum triglycerides and non-high-density lipoprotein, but not low-density lipoprotein (LDL), are associated with large artery atherosclerotic stroke. These non-LDL lipid measures may have utility in delineating atherosclerotic stroke risk.