Characteristics

Total population

Group I

Group II

Effective

32

11 (34.4%)

21 (65.6%)

M/F

14 (43.75)/18 (56.25)

4 (36.4%)/7 (63.6%)

10 (47.6%)/11 (52.4%)

Sex ratio: 0.7

Age:

average

53 ans

58.4 ans

50.19 ans

p = 0.6

extremes

(13 - 82)

(17 - 78)

(13 - 82)

Antecedents

NF2

3 (9.4%)

0

3 (14.3%)

Gamma knife

2 (6.3%)

2 (18.2%)

0

Clinical data

tinnitus

11 (34.4%)

2 (18.2%)

9 (42.8%)

p = 0.46

cophosis

3 (9.4%)

0

3 (14.3%)

fear of heights

9 (28.1%)

1 (9.1%)

8 (38.1%)

p = 0.1

instability

20 (62.5%)

9 (81.8%)

11 (52.4%)

P = 0.44

cerebellar syndrome

14 (43.8%)

5 (45.4%)

9 (42.8%)

p = 0.86

headaches

18 (56.3%)

11 (100%)

7 (33.3%)

p = 0.12

Radiological data

Evans Index

0.36 (0.33 - 0.39)

0.37 (0.35 - 0.38)

0.36 (0.33 - 0.39)

p = 0.1

tumor diameter

3.15 cm (2 - 5.5)

2.86 cm (2 - 3.7)

3.29 cm (2 - 5.5)

p = 0.03

tumor volume

20.3 cc (4 - 87)

12.5 cc (4 - 22)

24.6 cc (4 - 87)

tumor laterality R/L

16 (50%)

16 (50%)

8 (72.7%)/3 (27.3%)

8 (38.1%)/13 (61.9%)