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. Author manuscript; available in PMC: 2011 Aug 1.
Published in final edited form as: Stroke. 2010 Jul 8;41(8):1636–1640. doi: 10.1161/STROKEAHA.110.584672

Table 2.

The percentage of patients with risk factor or demographic characteristic by location of intracranial stenosis

Risk Factor Location of Stenosis
ICA (n=119) % (95% CI) MCA (n=179) % (95% CI) Vertebral (n=107) % (95% CI) Basilar (n=112) % (95% CI) P-value*
Age > 64 42(33,51) 42(35,49) 51(42,61) 63(54,72) 0.0015
Female 34(26,44) 50(43,58) 25(17,35) 33(24,43) 0.0001
Black** 30(22,39) 40(32,47) 27(19,37) 24(17,33) 0.0243
Qualifying Event Stroke*** 63(54,72) 70(63,77) 56(46,66) 54(44,63) 0.0156
Diabetes 50(41,60) 33(26,40) 41(32,51) 29(21,39) 0.0030
Hypertension 85(77,91) 83(76,88) 85(77,91) 88(81,94) 0.6130
Lipid disorder 73(64,81) 64(57,71) 73(63,81) 79(70,86) 0.0540
CAD 32(24,41) 19(13,25) 38(29,49) 27(19,36) 0.0030

Percentage (95% Confidence Interval) of patients with the risk factor or demographic characteristic who have stenosis in the location of the artery of interest.

*

Chi-square p-value comparing the proportion of risk factor between the location of stenosis.

**

compared to White or Other.

***

compared to transient ischemic attack.

CAD = coronary artery disease.