Table 3.

Correlations Cognitive Tests, Traditional Doppler Measures and Strain Indices.

Cognitive Test	n=Traditional Doppler and Cognition	Surgical Side Maximum PSV Kendall Tau Correlation		Surgical Side MCA Mean Velocity Kendall Tau Correlation		Surgical Side MCA PI Kendall Tau Correlation
		r	p-value	r	p-value	r	p-value
Verbal fluency (phonemic)*	40	−0.09	0.433	−0.12	0.303	0.08	0.475
Psychomotor speed	40	−0.09	0.444	0.03	0.814	−0.08	0.509
Speeded mental flexibility*	39	−0.05	0.654	0.09	0.403	−0.02	0.875
Verbal learning*	40	−0.10	0.369	0.05	0.683	0.12	0.293
Delayed verbal memory*	40	−0.11	0.315	0.20	0.072	0.02	0.842
Visuospatial construction*	39	−0.13	0.276	−0.01	0.922	−0.12	0.298
Auditory attention/working memory*	40	−0.14	0.239	−0.20	0.083	0.03	0.786
Delayed visual memory*	39	−0.02	0.828	0.09	0.417	−0.10	0.396
		Maximum Axial Stain		Maximum Lateral Strain		Maximum Shear Strain
Cognitive Test	n=Strain and Cognition	Kendall Tau Correlation		Kendall Tau Correlation		Kendall Tau Correlation
		r	p-value	r	p-value	r	p-value
Verbal fluency (phonemic)*	40	−0.20	0.081	−0.22	0.046	−0.14	0.202
Psychomotor speed	40	−0.40	<0.001	−0.25	0.031	−0.35	0.003
Speeded mental flexibility*	39	−0.35	0.002	−0.29	0.010	−0.35	0.002
Verbal learning*	40	−0.18	0.115	−0.08	0.476	−0.05	0.649
Delayed verbal memory*	40	−0.16	0.161	−0.01	0.963	−0.03	0.779
Visuospatial construction*	39	−0.13	0.276	−0.04	0.760	−0.10	0.385
Auditory attention/working memory*	40	−0.24	0.036	−0.10	0.396	−0.01	0.906
Delayed visual memory*	39	−0.20	0.077	−0.12	0.276	−0.22	0.050

^*Verbal fluency (phonemic): Controlled Oral Word Association Test; psychomotor speed: Digit Symbol subtest from the WAIS-IV; speeded mental flexibility: Trail Making Test B; verbal learning: Hopkins Verbal Learning Test–Revised Total Learning; delayed verbal memory: Hopkins Verbal Learning Test–Revised Delayed Recall; visuospatial construction: Block Design Subtest from the WAIS IV; auditory attention/working memory: Digit Span subtest from the WAIS-IV; delayed visual memory: Rey Complex Figure Delayed Recall. Modified with permission from Mitchell C, Wilbrand SM, Cook TD, Meshram NH, Steffel CN, Nye R, Varghese T, Hermann BP and Dempsey RJ. Traditional Doppler Measures Do Not predict Cognition in a Cohort With Advanced Atherosclerosis. Stroke. 50:Suppl_1 abstract WMP47.⁴⁹

MCA=middle cerebral artery, PI=pulsatility index, PSV=peak systolic velocity.