Items

MBI ≤ 35

(n)

MBI > 35

(n)

χ2

P

Sex

Female

3

8

2.231

0.135

Male

8

6

Age (years)

≤50

3

3

0.115

0.734

>50

8

11

Years of education

0

0

3

3.423

0.181

≤12

7

5

>12

4

6

Method of treatment

Clipping

3

4

0.005

0.943

Coiling

8

10

Location of aneurysm

Anterior circulation

9

11

0.041

0.840

Posterior circulation

2

3

Hypertension

Yes

9

8

1.724

0.189

No

2

6

Smoking

Yes

6

2

4.588

0.032

No

5

12

Course of disease

≤6 month

8

11

0.115

0.734

>6 month

3

3

DCI

Yes

7

8

0.108

0.742

No

4

6

Hydrocephalus

Yes

8

1

11.5

0.001

No

3

13

WFNS-SAH

1 grade

1

0

4.429

0.219

2 grade

0

1

4 grade

1

5

5 grade

9

8