Table 2 Baseline characteristics of study subjects
Characteristics | Case (n = 555) | Controls (n = 618) | P value |
|---|---|---|---|
Age (year) | 60.15 ± 9.896 | 60.05 ± 10.170 | 0.517 |
Sex | 0.798 | ||
Male (%) | 394 (70.1) | 434 (70.2) | |
Female (%) | 161 (29.9) | 184 (29.8) | |
Smoking status | < 0.001 | ||
Ever (%) | 343 (61.8) | 143 (23.1) | |
Never (%) | 212 (38.2) | 475 (76.9) | |
Pathological types | – | ||
Squamous Cells Carcinoma (%) | 215 (38.7) | – | |
Adenocarcinoma (%) | 248 (44.6) | – | |
Small Cell Carcinoma (%) | 92 (16.7) | – |