Variable

Univariate analysis

Multivariate analysis

P value

P value

Odd ratio

Confidence interval 95%

Age

0.0006*

0.04*

1.07

1.007 - 1.15

Size of dome

continuous

Categorical (>10 mm)

0.15

0.03*

0.78

0.94

0.64 - 1.35

WFNS grade 4 - 5

0.0002*

0.01*

10.2

1.86 - 79.3

Modified Fisher grade 4

0.007*

0.7

0.69

0.08 - 4.51

Ischemic events

0.00003*

0.04*

5.81

1.11 - 37.3

hydrocephalus

0.0004*

0.02*

7.95

1.39 - 62.7