Table 3:
Incidence rate of events per 1000 person-years of follow up by asymptomatic intracranial large artery stenosis category in the Northern Manhattan Study cohort (N=1211).
| Incidence rate per 1000 person-year, 95% confidence interval | ||||||
|---|---|---|---|---|---|---|
| No stenosis N=667 |
<50% stenosis N=447 |
50-70% stenosis N=37 |
>70% stenosis or flow gap N=70 |
|||
| Death, N=454 | 28, 25-33 |
32, 27-36 |
53, 34-82 |
63, 46-88 |
||
| Vascular death, N=200 | 12, 9-14 |
14, 11-17 |
32, 18-56 |
35, 23-54 |
||
| Myocardial infarction, N=61 | 4, 2-5 |
6, 0.5-19 |
3, 0.5-19 |
8, 3-21 |
||
| Stroke, N=122 | 6, 4-8 |
11, 9-14 |
16, 7-35 |
17, 9-33 |
||
| Ischemic stroke, N=104 | 5, 3-7 |
9, 7-36 |
16, 7-36 |
15, 7-30 |
||
| Cardioembolic, N=39 | 2, 1-4 |
3, 2-4 |
8, 3-25 |
5, 2-17 |
||
| Intracranial (small or large) artery disease, N=36 | 1, 0.5-2 |
4, 2-6 |
5, 1-21 |
7, 3-19 |
||
| Small artery disease N=25 | 1, 0.5-2 |
3, 2-5 |
3, 0.5-19 |
2, 0.5-13 |
||
| Intracranial atherosclerosis, N=11 | 0.3, 0.1-1 |
0.8, 0.3-2 |
3, 0.5-18 |
5, 2-17 |
||
| Cryptogenic, N=19 | 1, 0.5-2 |
2, 1-3 |
- | - | ||
| Any vascular event, N=324 | 19, 16-22 |
27, 24-32 |
38, 22-64 |
55, 38-80 |
||