Table 4. Multivariable logistic regression analysis by time from emergency department visit to emergency neurosurgery.

	Model 1	Model 2	Model 3
	Adjusted OR (95% CI)	Adjusted OR (95% CI)	Adjusted OR (95% CI)
In-hospital mortality
Ultra-early (0–2 hours)	1.03 (0.81–1.31)	0.89 (0.69–1.14)	0.90 (0.69–1.16)
Early (2–4 hours)	0.81 (0.67–1.00)	0.77 (0.62–0.95)	0.78 (0.63–0.96)
Late (4–12 hours)	1.00	1.00	1.00
Reoperation
Ultra-early (0–2 hours)	0.83 (0.60–1.14)	0.92 (0.66–1.28)	0.92 (0.66–1.29)
Early (2–4 hours)	0.90 (0.70–1.17)	0.96 (0.74–1.24)	0.96 (0.74–1.24)
Late (4–12 hours)	1.00	1.00	1.00

OR, odds ratio; CI, confidence interval.

* Model 1: Adjusted for age, and sex.

* Model 2: Adjusted for variables in Model 1, mental status at triage, combined intraventricular hemorrhage, and type of hemorrhagic stroke.

* Model 3: Adjusted for variables in Model 2, emergency medical services use, transferred from other hospital, and level of emergency department.