Risk factors for lacune subtypes in the Atherosclerosis Risk in Communities (ARIC) study

D. C. Bezerra, A. R. Sharrett, K. Matsushita, R. F. Gottesman, D. Shibata, T. H. Mosley, J. Coresh, M. Szklo, M. S. Carvalho, E. Selvin

Research output: Contribution to journalArticle

Abstract

Objective: Lacunar infarctions are mainly due to 2 microvascular pathologies: lipohyalinosis and microatheroma. Little is known about risk factor differences for these subtypes. We hypothesized that diabetes and glycated hemoglobin (HbA1c) would be related preferentially to the lipohyalinotic subtype. Methods: We performed a cross-section analysis of the brain MRI data from 1,827 participants in the Atherosclerosis Risk in Communities study. We divided subcortical lesions ≤20 mm in diameter into those ≤7 mm (of probable lipohyalinotic etiology) and 8-20 mm (probably due to microatheroma) and used Poisson regression to investigate associations with the number of each type of lesion. Unlike previous studies, we also fitted a model involving lesions <3 mm. Results: Age (prevalence ratio [PR] 1.11 per year; 95% confidence interval [CI] 1.08-1.14), black ethnicity (vs white, PR 1.66; 95% CI 1.27-2.16), hypertension (PR 2.12; 95% CI 1.61-2.79), diabetes (PR 1.42; 95% CI 1.08-1.87), and ever-smoking (PR 1.34; 95% CI 1.04-1.74) were significantly associated with lesions ≤7 mm. Findings were similar for lesions <3 mm. HbA1c, substituted for diabetes, was also associated with smaller lesions. Significantly associated with 8-20 mm lesions were age (PR 1.14; 95% CI 1.09-1.20), hypertension (PR 1.79; 95% CI 1.14-2.83), ever-smoking (PR 2.66; 95% CI 1.63-4.34), and low-density lipoprotein (LDL) cholesterol (PR 1.27 per SD; 95% CI 1.06-1.52). When we analyzed only participants with lesions, history of smoking (PR 1.99; 95% CI 1.23-3.20) and LDL (PR 1.33 per SD; 95% CI 1.08-1.65) were associated with lesions 8-20 mm. Conclusions: Smaller lacunes (even those <3 mm) were associated with diabetes and HbA1c, and larger lacunes associated with LDL cholesterol, differences which support long-held theories relating to their underlying pathology. The findings may contribute to broader understanding of cerebral microvascular disease.

Original languageEnglish (US)
Pages (from-to)102-108
Number of pages7
JournalNeurology
Volume78
Issue number2
DOIs
StatePublished - Jan 10 2012

ASJC Scopus subject areas

  • Clinical Neurology

Fingerprint Dive into the research topics of 'Risk factors for lacune subtypes in the Atherosclerosis Risk in Communities (ARIC) study'. Together they form a unique fingerprint.

  • Cite this