|
Variables
|
Cases
|
Control
|
P
|
|---|
|
N
|
535
|
538
| |
|
Age
| | | |
|
Mean ± SD, years
|
46.8 ± 15.1
|
46.9 ± 13.8
|
0.875
|
|
> 46 years
|
296 (55.3%)
|
301 (55.9%)
| |
|
≤ 46 years
|
239 (44.7%)
|
237 (44.1%)
| |
|
Gender
| | |
0.908
|
|
Male
|
205 (38.3%)
|
208 (38.7%)
| |
|
Female
|
330 (61.7%)
|
330 (61.3%)
| |
|
Lymph nodes metastasis
|
|
Yes
|
101 (18.9%)
| | |
|
No
|
82 (15.3%)
| | |
|
Unavailable
|
352 (65.8%)
| | |
|
Stage
|
|
I-II
|
140 (26.2%)
| | |
|
III-IV
|
34 (6.4%)
| | |
|
Unavailable
|
361 (67.5%)
| | |
|
Type of head and neck cancer
|
|
Nasopharyngeal carcinoma
|
75 (14.0%)
| | |
|
Thyroid cancer
|
398 (74.4%)
| | |
|
Laryngeal cancer
|
43 (8.0%)
| | |
|
Parotid gland carcinoma
|
19 (3.6%)
| | |
-
p values were calculated by χ2 test or the Student’s t test
-
*p < 0.05 indicates statistical significance
