IL1A and Stroke: In terms of stroke etiology, TT genotype and T allele frequencies of IL-1α-889 were more common among cases with LAA (cases with LAA versus controls: TT: 18.4% versus 10.1%, P < 0.05; T: OR = 1.442, 95% CI = 1.18–1.78, and P = 0.001).