Table 3 Incidence and annual event rate of outcomes during follow-up
From: Long-term outcome of vertebral artery origin stenosis in patients with acute ischemic stroke
| Â | Incidence, number of patients (%) | Annual event rate, per 100 patient-years units (95% CI) | P-value* | ||||
|---|---|---|---|---|---|---|---|
|  | Total (n = 137) | Asymptomatic (n = 64) | Symptomatic (n = 73) | Total (n = 137) | Asymptomatic (n = 64) | Symptomatic (n = 73) | |
All stroke | 15 (10.9) | 9 (14.1) | 6 (8.2) | 4.86 (2.93–8.06) | 6.02 (3.13–11.58) | 3.77 (1.69–8.38) | 0.367 |
  Posterior circulation ischemic stroke | 3 (2.2) | 0 (0) | 3 (4.1) | 0.97 (0.31–3.01) | 0.00 | 1.88 (0.61–5.84) | 0.046 |
  Anterior circulation ischemic stroke | 4 (2.9) | 3 (4.7) | 1 (1.4) | 1.30 (0.49–3.45) | 2.01 (0.65–6.23) | 0.63 (0.09–4.45) | 0.277 |
  Hemorrhagic stroke | 6 (4.4) | 4 (6.3) | 2 (2.7) | 1.94 (0.87–4.33) | 2.68 (1.00–7.13) | 1.26 (0.31–5.02) | 0.367 |
  Unknown stroke | 2 (1.5) | 2 (3.1) | 0 (0) | 0.65 (0.16–2.59) | 1.34 (0.33–5.35) | 0.00 | 0.088 |
Unstable angina/myocardial infarction | 4 (2.9) | 2 (3.1) | 2 (2.7) | 1.30 (0.49–3.45) | 1.34 (0.33–5.35) | 1.26 (0.31–5.02) | 0.949 |
Vascular death | 4 (2.9) | 2 (3.1) | 2 (2.7) | 1.30 (0.49–3.45) | 1.34 (0.33–5.35) | 1.26 (0.31–5.02) | 0.949 |
Composite cardiovascular outcome | 21 (15.3) | 11 (17.2) | 10 (13.7) | 6.80 (4.43–10.43) | 7.36 (4.08–13.30) | 6.28 (3.38–11.66) | 0.714 |
Non–vascular death | 14 (10.2) | 8 (12.5) | 6 (8.2) | 4.53 (2.69–7.66) | 5.36 (2.68–10.71) | 3.77 (1.69–8.38) | 0.512 |