Table 4 Distribution of Gera9 and TMS (Thailand-Malaysia-Singapore) classifications.

From: A new radiological classification for the risk assessment of anterior skull base injury in endoscopic sinus surgery

Gera *

TMS**

TOTAL

(n)

Type 1

n (%)

Type 2

n (%)

Type 3

n (%)

*Right

Class I

35 (23.3)

2 (1.3)

2 (1.3)

39 (25.9)

Class II

90 (60)

1 (0.7)

12 (8)

103 (68.7)

Class III

7 (4.7)

0

1 (0.7)

8 (5.4)

**Left

Class I

28 (18.6)

0

4 (2.7)

32 (21.3)

Class II

103 (68.7)

2 (1.3)

9 (6)

114 (76)

Class III

3 (2)

0

1 (0.7)

4 (2.7)

TOTAL (n)

266

5

29

300

  1. Gera9 and TMS classifications have no significant correlation (p = 0.804).
  2. *Gera (Class I, low risk: the angle >80 degrees, Class II, medium risk: the angle ranged from 45 to 80 degrees, Class III, high risk: the angle <45 degrees).
  3. ***TMS (type 1: both OF-CP and OF-ER are longer than 10 mm, type 2: either OF-CP or OF-ER is less than 10 mm, type 3: both OF-CP and OF-ER are less than 10 mm).
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