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. 2021 Dec 13;12:788145. doi: 10.3389/fneur.2021.788145

Table 3.

Subgroup analysis stratified by age.

Variables Age < 65y Age 65 y
Total n Events HR (95%CI) P value Total n Events HR (95%CI) P value
With BA dolichosis 18 1 0.712 (0.079–6.408) 0.762 21 8 7.319 (1.525–35.123) 0.013
Without BA dolichosis 40 4 Ref NA 34 2 Ref NA

BA, basilar artery; HR, Hazard ratio; CI, confidence interval; NA, not applicable.