Elevated B2M Levels Tied to Ischemic Stroke Risk in Women
β2-microglobulin (B2M) levels may be an indicator of ischemic stroke risk in women, according to new findings published in Neurology (May 10). Investigators performed a nested case-control study among women enrolled in the Nurses' Health Study who provided blood samples between 1989 and 1990 and were free of prior stroke and cancer. They analyzed the association between B2M and ischemic stroke using multivariable conditional logistic regression to adjust for traditional stroke risk factors in 473 ischemic stroke cases. They found that median levels of B2M were higher among cases than controls. Additionally, women in the highest B2M quartile had a multivariable-adjusted increased risk of ischemic stroke compared to those in the lowest quartile. Results were similar when restricted to those without evidence of chronic kidney disease. In an exploratory analysis, the association between B2M and thrombotic stroke was similar to the overall ischemic stroke results, but no association was observed for embolic stroke risk.