Table 3 The distribution of TMS (Thailand-Malaysia-Singapore) and Keros classifications7.

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

TMS*

Keros **

TOTAL

(n)

Type 1

n (%)

Type 2

n (%)

Type 3

n (%)

Right

Type 1

21 (14)

111 (74)

0

132

Type 2

0

3 (2)

0

3

Type 3

15 (10)

0

0

15

Left

Type 1

23 (15.3)

111 (74)

0

134

Type 2

1 (0.7)

1 (0.7)

0

2

Type 3

13 (8.6)

1 (0.7)

0

14

TOTAL (n)

73

227

0

300

  1. TMS and Keros7 classifications have significant correlation (p < 0.05).
  2. *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).
  3. **Keros (type 1: 1–3 mm depth of cribriform plate, type 2: 4–7 mm depth of cribriform plate, type 3: more than 7 mm depth of cribriform plate).
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