Predictive factors for arterial occlusion site
| Sensitivity | Specificity | Accuracy | Univariate analysis, p value | Multivariate analysis, OR (95% CI) | |
|---|---|---|---|---|---|
| *Significantly lower than the other occlusion groups. | |||||
| †p < 0.05, ‡p < 0.0005. | |||||
| Variables in bold have significance. | |||||
| ALN, attenuation of the lentiform nucleus; branch, middle cerebral artery branch occlusion; HMCAS, hyperdense middle cerebral artery sign; HSE, hemispherical sulcus effacement; ICA, internal carotid artery; LIR, loss of insular ribbon; M1, sphenoidal portion of the middle cerebral artery; NIHSS, National Institutes of Health stroke scale. | |||||
| ICA occlusion | |||||
| Age ⩾65 years | 69% | 34% | 44% | NS | – |
| Male | 59% | 41% | 46% | NS | – |
| NIHSS ⩾16 | 62% | 47% | 51% | NS | – |
| LIR | 55% | 70% | 66% | <0.05 | 2.8 (1.2 to 6.8)† |
| ALN | 52% | 63% | 60% | NS | – |
| HSE | 41% | 59% | 54% | NS | – |
| LIR+ALN+HSE | 35% | 87% | 72% | <0.05 | – |
| LIR+ALN | 10% | 86% | 65% | NS | – |
| Isolated HSE | 0% | 78% | 56% | <0.005* | – |
| HMCAS | 35% | 78% | 66% | NS | – |
| M1 occlusion | |||||
| Age ⩾65 years | 62% | 31% | 41% | NS | – |
| Male | 62% | 42% | 49% | NS | – |
| NIHSS⩾16 | 79% | 56% | 64% | <0.001 | 3.4 (1.2 to 9.4)† |
| LIR | 47% | 68% | 61% | NS | – |
| ALN | 65% | 70% | 69% | <0.001 | 2.9 (1.2 to 7.4)† |
| HSE | 38% | 58% | 51% | NS | – |
| LIR+ALN+HSE | 24% | 83% | 64% | NS | – |
| LIR+ALN | 24% | 92% | 70% | <0.05 | – |
| Isolated HSE | 9% | 80% | 57% | NS | – |
| HMCAS | 32% | 78% | 63% | NS | – |
| Branch occlusion | |||||
| Age ⩾65 years | 71% | 36% | 49% | NS | – |
| Male | 58% | 40% | 47% | NS | – |
| NIHSS <16 | 66% | 67% | 67% | <0.005 | 5.0 (1.6 to 10.0)† |
| LIR | 18% | 52% | 40% | <0.005* | – |
| ALN | 16% | 45% | 34% | <0.0001* | – |
| HSE | 47% | 63% | 57% | NS | – |
| LIR+ALN+HSE | 5% | 73% | 49% | <0.01* | – |
| LIR+ALN | 8% | 84% | 56% | NS | – |
| Isolated HSE | 37% | 96% | 74% | <0.0001 | 12.8 (3.2 to 51.5)‡ |
| HMCAS | 16% | 69% | 50% | NS | – |