Table 3 Univariate analysis for those undergoing CTA

Age (mean years (SD))

61 (16)

65 (15)

0.178

Sex (n (% male))

16 (44 %)

34 (67 %)

0.039

Race (n (% black))

4 (11 %)

11 (22 %)

0.203

Systolic blood pressure (mean mmHg (SD))

149 (24)

158 (22)

0.093

 Coronary artery disease

6 (17 %)

12 (24 %)

0.436

 Diabetes

8 (22 %)

15 (29 %)

0.454

 Hypertension

24 (67 %)

35 (69 %)

0.847

 Hyperlipidemia

17 (47 %)

28 (55 %)

0.480

 History of smoking

28 (50 %)

32 (63 %)

0.371

 Dysarthria

2 (5 %)

21 (41 %)

<0.0001

 Diplopia

8 (22 %)

10 (20 %)

0.665

 Facial droop

0 (<1 %)

23 (45 %)

<0.0001

 Unilateral symptoms^a

8 (22 %)

34 (67 %)

<0.0001

 Any calcium on CTA (n)

24 (67 %)

36 (71 %)

0.697

 Proximal vertebral artery

5 (14 %)

8 (16 %)

0.817

 Distal vertebral artery

2 (6 %)

5 (10 %)

0.473

 Basilar artery

0 (<1 %)

3 (6 %)

0.139

 Proximal carotid artery

14 (39 %)

25 (49 %)

0.349

 Distal carotid artery

10 (28 %)

30 (59 %)

0.004

 Aortic arch

15 (42 %)

26 (51 %)

0.391