|
Variables
|
SMG preservation
|
SMG excision
|
p
|
|---|
| |
N = 31
|
N = 106
| |
|
Age
|
55.4 (38–65)
|
60.5 (35–78)
|
0.034
|
|
Sex
|
|
Male
|
20 (64.5%)
|
83 (78.3%)
| |
|
Female
|
11 (35.5%)
|
23 (21.7%)
|
0.118
|
|
Smoker
|
|
Yes
|
19 (61.3%)
|
79 (74.5%)
| |
|
No
|
12 (38.7%)
|
27 (25.5%)
|
0.151
|
|
Drinker
|
|
Yes
|
15 (48.4%)
|
57 (53.8%)
| |
|
No
|
16 (51.6%)
|
49 (46.2%)
|
0.597
|
|
Clinical tumor stage
|
|
T1
|
17 (54.8%)
|
45 (42.5%)
| |
|
T2
|
14 (45.2%)
|
61 (57.5%)
|
0.223
|
|
Pathologic tumor stage
|
|
T1
|
15 (48.4%)
|
40 (37.7%)
| |
|
T2
|
16 (51.6%)
|
66 (62.3%)
|
0.287
|
|
Perineural invasion
|
|
Positive
|
4 (12.9%)
|
10 (9.4%)
| |
|
Negative
|
27 (87.1%)
|
96 (90.6%)
|
0.736
|
|
Lymphovascular invasion
|
|
Positive
|
3 (9.7%)
|
10 (9.4%)
| |
|
Negative
|
28 (90.3%)
|
96 (90.6%)
|
1.000
|
|
Tumor differentiation
|
|
Well
|
10 (32.3%)
|
30 (28.3%)
| |
|
Moderate
|
14 (45.2%)
|
64 (60.4%)
| |
|
Poor
|
7 (22.6%)
|
12 (11.3%)
|
0.199
|
|
Cervical lymph node stage
|
|
N0
|
25 (80.6%)
|
88 (83.0%)
| |
|
N+
|
6 (19.4%)
|
18 (17.0%)
|
0.760
|
|
Transient MMN injury*
|
2 (6.5%)
|
10 (9.4%)
|
0.734
|
|
Postoperative radiotherapy
|
4 (12.9%)
|
23 (21.7%)
|
0.319
|
- *MMN Marginal mandibular nerve
