Table 2.

The multivariate analysis regarding the correlation between CT signs or other clinical data and poor prognosis at 3 or 12 months post-onset

Risk factors	Prognostic indicators at 3-months after onset
All cases (N = 451)	Poor Prognosis(N = 214) N(%) or Median(IQR)	Good prognosis(N = 237) N(%) or Median(IQR)	P	OR	95% CI
Swirl sign	92(43.0)	75(31.6)	0.010	2.198	1.827,3.069
Age, years	62.28 ± 11.95	56.50 ± 11.55	0.003	1.042	1.024,1.061
mRS score after ICH	5(1)	4(2)	0.003	1.499	1.212,1.853
Time from CT to onset, hours	2.86 ± 3.07	4.19 ± 3.50	0.018	0.994	0.989,0.999
Ventricular hemorrhage	100(46.7)	78(32.9)	0.003	2.422	2.005,3.386
Risk factors	Prognostic indicators at 1 year after onset
All cases (N = 451)	Poor Prognosis(N = 199) N(%) or Median(IQR)	Good prognosis(N = 252) N(%) or Median(IQR)	P	OR	95% CI
Island sign	56(28.1)	39(15.5)	0.001	2.666	2.389,3.670
Age, years	62.40 ± 11.87	56.75 ± 11.68	0.003	1.043	1.020,1.067
mRS score after ICH	5(1)	4(2)	0.003	1.524	1.158,2.006
Hematoma expansion	42(25.8)	20(9.9)	0.014	3.572	3.383,4.402

A good prognosis was defined as an mRS score lower than 3, whereas a poor prognosis, including death (score of 6), was indicated by a score of 3 or higher