Characteristics of patients and lesions
| With Normal Perfusion on Brain CTP (n = 29) | With Hypoperfusion on Brain CTP (n = 62) | P Value | |
|---|---|---|---|
| Age (mean) (yr) | 58.8 ± 9.2 | 61.5 ± 10.9 | .237 |
| Male sex (No.) (%) | 16 (17.6%) | 47 (51.6%) | .261 |
| Current smoker (No.) (%) | 4 (4.4%) | 30 (33.0%) | .001 |
| Hypertension history (No.) (%) | 13 (14.3%) | 38 (41.8%) | .073 |
| Diabetes mellitus history (No.) (%) | 5 (5.5%) | 19 (20.9%) | .204 |
| Blood pressure (mean) (mm Hg) | |||
| SBP | 139.6 ± 25.9 | 140.7 ± 24.1 | .874 |
| DBP | 79.3 ± 14.3 | 83.1 ± 13.9 | .283 |
| Fasting blood glucose (mean) (mmol/L) | 5.5 ± 1.1 | 6.4 ± 2.5 | .069 |
| Cholesterol (mean) (mmol/L) | |||
| Total cholesterol | 4.1 ± 0.8 | 4.0 ± 1.2 | .814 |
| HDL | 1.1 ± 0.3 | 1.1 ± 0.4 | .988 |
| LDL | 2.2 ± 0.7 | 2.2 ± 1.0 | .954 |
| Triglycerides | 1.7 ± 0.9 | 1.5 ± 0.9 | .494 |
| Admitting diagnosis (No.) (%) | |||
| Transient ischemic attack | 10 (11.0%) | 11 (12.1%) | .916 |
| Acute ischemic stroke | 8 (8.8%) | 26 (28.6%) | .086 |
| Chronic ischemic stroke | 11 (12.1%) | 25 (27.5%) | .541 |
| Time from onset to CT/MRI (mean) (day) | 29.1 ± 19.6 | 24.0 ± 18.9 | .408 |
| Median (interquartile range 25%–75%) | 24 (15.5∼46) | 22 (11∼30) | .536 |
| Anatomic severity of lesion on CTA (No.) (%) | |||
| Severe | 10 (11.0%) | 49 (53.8%) | .004 |
| Moderate | 19 (20.9%) | 13 (14.3%) | .674 |
| Stenosis length (mean) (mm) | 4.7 ± 2.5 | 4.9 ± 2.7 | .795 |
| Collateral scoring on CTA | 4.5 ± 0.4 | 3.7 ± 1.5 | .002 |
| Fractional flow on MRA | 0.9 ± 0.2 | 0.7 ± 0.2 | .000 |
Note:—HDL indicates high density lipoprotein; LDL, low density lipoprotein; SBP, systolic blood pressure; DBP, diastolic blood pressure.