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. Author manuscript; available in PMC: 2021 Oct 1.
Published in final edited form as: J Ultrasound Med. 2020 May 12;39(10):2033–2042. doi: 10.1002/jum.15311

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.