Table 3.
Prevalence of intracranial arterial stenosis (ICAS) and its different classifications in individuals with different levels of stroke risk.
| Classification | Different stroke risk population [%
(95% CI)] |
|||
|---|---|---|---|---|
| Low-risk stroke population (%) | Moderate-risk stroke population (%) | High-risk stroke population (%) | p value | |
| Total | 22.3 (18.7–26.0) | 16.0 (12.7–19.2) | 61.7 (57.4–65.9) | |
| Single ICAS | 24.5 (19.3–29.7) | 15.1 (10.8–19.4) | 60.4 (54.5–66.3) | 0.447 |
| Multiple ICAS | 19.9 (14.8–25.0) | 16.9 (12.1–21.8) | 63.1 (56.9–69.3) | |
| Mild stenosis | 27.2 (22.4–32.0) | 16.9 (12.9–21.0) | 55.9 (50.5–61.3) | 0.001 |
| Moderate stenosis | 13.3 (6.2–20.5) | 16.7 (8.8–24.5) | 70.0 (60.3–79.7) | |
| Severe stenosis | 21.4 (5.2–37.6) | 14.3 (0.5–28.1) | 64.3 (45.4–83.2) | |
| Occlusion | 7.7 (0.2–15.2) | 9.6 (1.3–17.9) | 82.7 (72.1–93.3) | |
CI, confidence interval.