Table 1 Baseline characteristics, complications, and outcome

Age, years

53.8 ± 10.3

56.0 ± 9.4

53.5 ± 10.5

0.588

Sex

0.727

 Female

190 (56.7)

25 (54.3)

165 (57.1)

 Male

145 (43.3)

21 (45.7)

124 (42.9)

Comorbidities

 Smoking

59 (17.6)

9 (19.6)

50 (17.3)

0.708

 Drinking

31 (9.3)

7 (15.2)

24 (8.3)

0.133

 Hypertension

156 (46.6)

26 (56.5)

130 (45.0)

0.145

 Diabetes

24 (7.2)

4 (8.7)

20 (6.9)

0.665

 Hyperlipemia

9 (2.7)

3 (6.5)

6 (2.1)

0.083

 Respiratory disease

4 (1.2)

1 (2.2)

3 (1.0)

0.510

 Coronary disease

10 (3.0)

2 (4.3)

8 (2.8)

0.559

 Prior infarction

22 (6.6)

5 (10.9)

17 (5.9)

0.205

 Prior hemorrhage

2 (0.6)

1 (2.2)

1 (0.3)

0.135

Admission characteristics

 Onset to admission (days)

2 (1–3)

1 (0–2)

2 (0–4)

0.005

 Brain herniation

10 (3.0)

2 (4.3)

8 (2.8)

0.559

H–H grade

0.01

 1

40 (11.9)

3 (6.5)

37 (12.8)

 2

193 (57.6)

24 (52.2)

169 (58.5)

 3

5 (1.5)

3 (6.5)

2 (0.7)

 4

97 (29.0)

16 (34.8)

81 (28.0)

WFNS grade

< 0.001

 1

142 (42.4)

8 (17.4)

134 (46.4)

 2

135 (40.3)

23 (50.0)

112 (38.8)

 3

12 (3.6)

5 (10.9)

7 (2.4)

 4

32 (9.6)

9 (19.6)

23 (8.0)

 5

14 (4.2)

1 (2.2)

13 (4.5)

mFS

0.016

 1

90 (26.9)

4 (8.7)

86 (29.8)

 2

83 (24.8)

13 (28.3)

70 (24.)

 3

45 (13.4)

6 (13.0)

39 (13.5)

 4

117 (34.9)

23 (50.0)

94 (32.5)

Hospital course and complications

 Time of extubation

0.012

 Ultra-early stage (< 24 h)

267 (79.7)

43 (93.5)

224 (77.5)

 Early stage (≥ 24 h)

68 (20.3)

3 (6.5)

65 (22.5)

 Delayed cerebral ischemia

70 (20.9)

31 (67.4)

39 (13.5)

< 0.001

 Hydrocephalus

7 (2.1)

3 (6.5)

4 (1.4)

0.024

 Length of hospital stay (days)

13.7 ± 8.1

17.0 ± 8.9

13.2 ± 7.8

0.004

 Disability at discharge

2877 (23.5)

27 (65.9)

50 (17.4)

< 0.001

 Hospital mortality

7 (2.1)

5 (10.9)

2 (0.7)

< 0.001