Table 3.

Factors related to improvement observed on imaging

	Improvement on imaging study	Univariate analysis	Multivariate analysis
	Mean ± SD or n (%)	P-value	Hazard ratio (95% CI)	P-value
Age	59.4 ± 14.4	0.571
Sex
Female	775 (97.0%)	0.592
Male	396 (97.5%)
Treatment for ruptured aneurysm
Direct surgery	684 (97.3%)	0.906
Endovascular embolization	449 (97.0%)
Target vessel
Anterior circulation	1043 (97.0%)	0.600
Posterior circulation	87 (96.7%)
Both circulation	32 (100.0%)
Distribution
Proximal vessel	727 (96.9%)	0.573
Distal vessel	319 (97.3%)
Diffuse type	116 (98.3%)
Responsible doctor
Supervisory doctor	353 (96.4%)	0.573
Specialist	647 (97.6%)
Non-specialist	171 (97.2%)
Anesthesia
General	113 (98.3%)
Local	1057 (97.1%)
Number of times
The first time	855 (97.8%)	0.027*	2.72 (1.28–5.68)	0.010*
Over and second times	315 (95.5%)		–
Timing (h)
<3	369 (97.9%)	0.158	2.88 (1.16–7.59)	0.023*
3–6	337 (96.8%)		1.63 (0.70–3.83)	0.254
>6	233 (95.1%)		–
Strategy
IA-vasodilators	919 (97.0%)
PTA	252 (97.7%)

CI: confidence interval, IA: intra-arterial, PTA: percutaneous transluminal angioplasty, SD: standard deviation, ^*Statistically significant.