Table 2.
Multivariate analysis: predictors of outcome in patients ⩾75 years.
| Variables | Unadjusted OR (95% CI) | p-value | Adjusted ORa (95% CI) | p-value |
|---|---|---|---|---|
| Functional outcome | ||||
| Initial NIHSS score | 1.067 (1.03–1.106) | <0.001 | 1.106 (1.055–1.160) | <0.001 |
| PC-CS score | 0.787 (0.649–0.954) | 0.015 | 0.908 (0.709–1.163) | 0.446 |
| Occlusion sites | ||||
| Distal basilar arteryb | 0.039 | 0.005 | ||
| Middle basilar artery | 2.889 (1.246–6.695) | 0.013 | 4.997 (1.792–13.931) | 0.002 |
| Proximal basilar artery | 1.750 (0.527–5.812) | 0.361 | 2.290 (0.582–9.004) | 0.236 |
| Vertebral artery-V4 | 4.250 (0.917–19.702) | 0.064 | 8.020 (1.498–42.924) | 0.015 |
| Intervention | 0.369 (0.153–0.890) | 0.027 | 0.262 (0.088–0.778) | 0.016 |
| Mortality | ||||
| Initial NIHSS score | 1.063 (1.030–1.098) | <0.001 | 1.082 (1.040–1.126) | <0.001 |
| PC-CS score | 0.742 (0.622–0.885) | 0.001 | 0.817 (0.663–1.008) | 0.059 |
| Intervention | 0.368 (0.180–0.751) | 0.006 | 0.257 (0.109–0.606) | 0.002 |
a
Adjusted estimates of effect were calculated using multiple regression taking the following variables into account: age, initial NIHSS, PC-CS score, occlusion site, onset to treatment time, intravenous thrombolysis and type of treatment.
b
Distal basilar artery was taken as reference.
CI, confidence interval; NIHSS, National Institutes of Health Stroke Scale; OR, odds ratio; PC-CS score, posterior circulation collateral system score.