Table 2.

Multivariate analyses for a poor outcome

	Odds ratio	95% CI	P
Stroke mechanism (ISAT to embolism)	4.10	1.67–9.92	0.002**
NIHSS scores	1.14	1.08–1.20	<0.001**
Successful reperfusion	0.28	0.11–0.68	0.005**
Collateral status grade (categorized)	0.50	0.31–0.82	0.006**

ISAT: In situ atherosclerotic thrombosis, NIHSS: NIH Stroke‐Scale, CI: confidence interval. **P < 0.01. Incorporated parameters are: stroke mechanism, age, male sex, hypertension, NIHSS scores, location of occlusion, collateral status grade, onset‐to‐treatment time, and reperfusion. Recanalization, use of combined modality and anticoagulation were not included because they are largely influenced by the reperfusion status.