showed a trendp = 0.048
The relatively rare U5 sub-clade and its defining polymorphism m.13617T>C showed a trend for association with stroke risk only with the logistic regression test (OR = 2.17, 95%CI = 1.01–4.67, p = 0.048, and OR = 2.18; 95%CI = 1.01–4.70, p = 0.047, respectively).