Table 2 Influencing factors of postoperative tinnitus in vestibular schwannoma

Gender (male/female)

29/25

31/44

1.931

0.165

Age (> 50 years/≤ 50 years)

32/22

30/45

4.665

0.031^*

Preoperative hearing (Class A, B/Class C, D)

13/41

37/38

8.439

0.004^*

Tumor size (≤ 3 cm/> 3 cm)

41/13

59/16

0.135

0.713

ICA invasion (≤ 1 cm/> 1 cm)

41/13

65/10

2.472

0.116

Tumor consistency (cystic/solid/mixed)

5/37/12

4/55/16

0.807

0.668

Cochlear nerve (+/−)

9/45

18/57

1.020

0.312

Degree of resection (total/subtotal)

46/8

62/13

0.146

0.702

THI

12.435

0.006^*

 Level 1

9

31

 Level 2

24

30

 Level 3

16

8

12.292

< 0.001^#

 Level 4、5

5

6