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 | - |