Variable | Case (%) (434) | Control (%) (593) | P value |
---|---|---|---|
Age, year (mean ± SD) | 57.97 ± 11.85 | 56.67 ± 15.88 | 0.134 |
Age, (year) | |||
 ≤ 57 | 190 (43.8) | 264 (44.5) | 0.813 |
 > 57 | 244 (56.2) | 329 (55.5) |  |
Gender | |||
 Male | 111 (25.6) | 180 (30.4) | 0.093 |
 Female | 323 (74.4) | 413 (69.6) |  |
Smoking status | |||
 Never | 338 (77.9) | 475 (80.1) | 0.044a |
 Ever | 96 (22.1) | 118 (19.9) |  |
Clinical stage | |||
 I, II | 86 (19.8) |  |  |
 III | 198 (45.6) |  |  |
 IV | 59 (13.6) |  |  |
 Other | 91 (21.0) |  |  |
Histology | |||
 AD | 233 (53.6) |  |  |
 SQ | 89 (20.5) |  |  |
 SCLC | 61 (14.1) |  |  |
 Other | 51 (11.8) |  |  |