|
Head/neck radiation
|
|
No
|
236
|
50.0
|
|
Yes
|
236
|
50.0
|
|
Sex
|
|
Female
|
60
|
12.71
|
|
Male
|
412
|
87.29
|
|
Body mass index (kg/m2)
|
|
≤ 18.5
|
17
|
3.6
|
|
18.6–25.0
|
228
|
48.3
|
|
25.1–30.0
|
157
|
33.26
|
|
30.1–35.0
|
51
|
10.81
|
|
35.1–40.0
|
16
|
3.39
|
|
≥ 40.1
|
3
|
0.64
|
|
Mallampati score
|
|
Data missing a
|
16
| |
|
1
|
63
|
13.82
|
|
2
|
205
|
44.96
|
|
3
|
130
|
28.51
|
|
4
|
58
|
12.72
|
|
Mouth opening
|
|
Data missing
|
3
| |
|
Full
|
367
|
78.25
|
|
Limited
|
102
|
21.75
|
|
Thyromental distance (≈ cm)
|
|
Data missing
|
391
| |
|
< 5
|
20
|
24.69
|
|
≥ 5
|
61
|
75.31
|
|
Edentulous Removable denture
|
|
Data missing
|
1
| |
|
Yes
|
101
|
21.44
|
|
No
|
370
|
78.56
|
|
Neck movement
|
|
Data missing
|
3
| |
|
Full range of motion
|
391
|
83.37
|
|
Restricted
|
78
|
16.63
|
|
Cancer location
|
|
Tongue
|
218
|
46.19
|
|
Tonsil
|
98
|
20.76
|
|
Floor of mouth
|
49
|
10.38
|
|
Mandible
|
26
|
5.51
|
|
Retromolar region
|
24
|
5.08
|
|
Buccal mucosa
|
22
|
4.66
|
|
Maxilla gingiva
|
5
|
1.06
|
|
Soft palate
|
5
|
1.06
|
|
Multiple locations
|
25
|
5.30
|
|
Cancer stage
|
|
Data missing
|
3
| |
|
T1
|
84
|
17.91
|
|
T2
|
155
|
33.05
|
|
T3
|
92
|
19.62
|
|
VT4
|
110
|
23.45
|
|
TX
|
24
|
5.12
|
|
Not staged
|
4
|
0.85
|
|
Intubation status
|
|
Data missing
|
16
| |
|
Difficult
|
58
|
12.72
|
|
Easy
|
398
|
87.28
|
|
Primary intubation technique
|
|
Data missing
|
10
| |
|
Direct laryngoscopy
|
267
|
57.79
|
|
Asleep FOI
|
137
|
29.65
|
|
Awake FOI
|
27
|
5.84
|
|
AirTraq video laryngoscopy
|
15
|
3.25
|
|
C-MAC video laryngoscopy
|
7
|
1.52
|
|
LMA intubation
|
3
|
0.65
|
|
Tracheostomy
|
6
|
1.30
|
|
Secondary intubation technique
|
|
AirTraq video laryngoscopy
|
4
|
50
|
|
Asleep FOI
|
4
|
50
|
