| |
No. of patients or controls
| |
|---|
|
Characteristics
|
Case (n)
|
Controls (n)
|
P
|
|---|
|
No.
|
360
|
360
| |
|
Age, y
| | |
>0.05
|
|
Median
|
57.2
|
56.3
| |
|
Range
|
24-81
|
23-87
| |
|
Gender
| | |
>0.05
|
|
Male
|
199
|
197
| |
|
Female
|
161
|
163
| |
|
Smoking status
| | |
<0.01
|
|
Never
|
210
|
258
| |
|
Former
|
56
|
43
| |
|
Current
|
94
|
59
| |
|
KPS
| |
-
|
-
|
|
≥80
|
289
|
-
| |
|
<80
|
71
|
-
| |
|
Histology
| |
-
| |
|
Squamous carcinoma
|
213
|
-
| |
|
Adenocarcinoma
|
111
|
-
| |
|
Others
|
36
|
-
| |
|
Tumor stage at diagnosis
| |
-
| |
|
I
|
81
|
-
| |
|
II
|
96
|
-
| |
|
III
|
82
|
-
| |
|
IV
|
101
|
--
| |
|
Lymph node
| |
--
| |
|
Positive
|
223
|
-
| |
|
Negative
|
137
|
-
| |
|
Bone metastasis
| |
-
| |
|
Yes
|
79
|
-
| |
|
No
|
281
|
-
| |
- Note: For the smoking status, classification for tobacco consumption is never (<100 cigarettes lifetime), former (> 100 cigarettes lifetime and quit >12 months prior) and current.
