Table 2.
Participant Characteristics
| Variable |
Median
(IQR) N (%) |
||
| Age (years) | 71 (9.75) | ||
| Female | 14 (35%) | ||
| Percent Stenosis | 70 (10%) | ||
| Symptomatic Patients | 20 (50%) | ||
|
Neurocognitive Tests | |||
| Test | Ability | Median | IQR |
| Controlled Oral Word Association Test | Verbal (phonemic) fluency | 41.00 | 10.00 |
| Trail Making Test -B | Motor sequencing (speeded metal flexibility) | 44.00 | 15.00 |
| Wechsler Adult Intelligence Scale 4th edition (WAIS-IV) Digit Symbol Coding | Psychomotor speed | 9.00 | 2.50 |
| Hopkins Verbal Learning –
Revised Total Learning |
Verbal learning | 45.00 | 18.25 |
| Hopkins Verbal Learning –
Revised Delayed Recall |
Delayed verbal memory | 44.00 | 18.00 |
| WAIS-IV: Block Design | Visuospatial construction | 10.00 | 2.50 |
| Rey Complex Figure Delayed Recall | Figure reproduction (delayed visual memory) | 46.00 | 16.50 |
| Doppler Velocity and Pulsatility Index | |||
| Variable | Median | Interquartile Range | |
| Surgical side PSV (Highest PSV Bulb, ICA) cm/s | 194.40 | 131.60 | |
| Surgical side MCA mean velocity cm/s | 42.90 | 21.50 | |
| Surgical side MCA PI unitless | 1.05 | 0.36 | |
| Strain | |||
| Variable | Median | Interquartile Range) | |
| Maximum axial % | 17.97 | 22.24 | |
| Maximum lateral % | 12.15 | 11.25 | |
| Maximum shear % | 20.72 | 22.89 | |
ICA=internal carotid artery, MCA=middle cerebral artery, PI=pulsatility index, PSV=peak systolic velocity.