Table 2.

Demographic information for subjects, with differences between the decliner and non‐decliner groups using t‐tests (t) or Chi‐squared statistic (χ2) as appropriate. Note that for current smoker and surgery type (CEA or CAS), while the χ2 statistic was significant, the number in each group did not differ, suggesting the significant test reflected an interaction

	Non‐Decliner (N=18), Mean(SD) or N(%)	Decliner (N=16), Mean(SD) or N(%)	t	X 2	t‐ or chi‐squared test P‐value
Age	69.83 (7.91)	68.44 (8.11)	0.498		0.622
Education	14.17 (1.62)	13.75 (1.39)	0.8		0.43
MMSE	28.28 (1.67)	27.25 (1.57)	1.84		0.075
RAVLT Sum	34.78 (11.68)	37.31 (8.55)			0.481
Procedure				4.25	0.039a
CEA	6 (33.33)	11 (68.75)
CAS	12 (66.67)	5 (31.25)
Surgery				0.083	0.774
Right	7 (38.89)	7 (43.75)
Left	11 (61.11)	9 (56.25)
Diabetes				0.105	0.746
No	10 (55.56)	8 (50)
Yes	8 (44.44)	8 (50)
Current Smoker				5.287	0.021a
No	17 (94.44)	10 (62.5)
Yes	1 (5.56)	6 (37.5)
Tobacco History				0.394	0.53
No	2 (11.11)	3 (18.75)
Yes	16 (88.89)	13 (81.25)
HTN				0.508	0.476
No	1 (5.56)	2 (12.5)
Yes	17 (94.44)	14 (87.5)
Hypercholesteremia				0.007	0.932
No	1 (5.56)	1 (6.25)
Yes	17 (94.44)	15 (93.75)
Contralateral Occlusion	18 (100)	16 (100)
Contralateral Stenosis				0.394	0.53
No	16 (88.89)	13 (81.25)
Yes	2 (11.11)	3 (18.75)
Prior Stroke				0.394	0.53
No	16 (88.89)	13 (81.25)
Yes	2 (11.11)	3 (18.75)
Post‐operative Infarct				0.472	0.492
No	10 (55.56)	7 (43.75)
Yes	8 (44.44)	9 (56.25)
Symptomatic				0.007	0.934
No	11 (61.11)	10 (62.5)
Yes	7 (38.89)	6 (37.5)

^aPaired, separate, comparisons of the no and yes groups did not differ.