Table 3:

Comparison of characteristics among patients with postoperatively improved, unchanged, or impaired cognition

GroupP Value
A) Improved Cognition (n = 10)B) Unchanged Cognition (n = 80)C) Impaired Cognition (n = 10)A vs BB vs CC vs A
Age (yr) (mean)64.9 ± 3.568.9 ± 6.267.9 ± 6.0.1378.8751.5357
Male sex90% (9/10)89% (71/80)90% (9/10)>.9999>.9999>.9999
Hypertension100% (10/10)88% (70/80)80% (8/10).5946.6175.4737
Diabetes mellitus50% (5/10)36% (29/80)30% (3/10).4942>.9999.6499
Dyslipidemia70% (7/10)51% (41/80)50% (5/10).3268>.9999.6499
Symptomatic lesion60% (6/10)63% (50/80)80% (8/10)>.9999.4908.6285
Infarction on preoperative MRI40% (4/10)55% (44/80)60% (6/10).5053>.9999.6563
Degree of ICA stenosis (%) (mean)88.0 ± 10.687.7 ± 8.283.0 ± 10.3.9942.2739.4348
Bilateral lesions20% (2/10)13% (10/80)20% (2/10).6175.6175>.9999
Duration of ICA clamping (min) (mean)37.0 ± 5.037.2 ± 5.836.9 ± 6.2.9940.9870.9992
ΔNAA/Cr ratio in ipsilateral hemisphere (mean)0.201 ± 0.0850.011 ± 0.112−0.171 ± 0.085<.0001<.0001<.0001
ΔNAA/Cr ratio in contralateral hemisphere (mean)0.081 ± 0.122−0.001 ± 0.092−0.044 ± 0.098.0428.4108.0169
ΔCho/Cr ratio in ipsilateral hemisphere (mean)0.077 ± 0.088−0.005 ± 0.063−0.108 ± 0.053.0013<.0001<.0001
ΔCho/Cr ratio in contralateral hemisphere (mean)0.036 ± 0.079−0.003 ± 0.070−0.011 ± 0.082.2786.9430.3465