Table 1 Selected characteristics of lung cancer cases and controls
Characteristics | Cases (n = 462) | Controls (n = 379) | P |
|---|---|---|---|
Age (year), median (IQR) | 68 (62 - 73) | 58 (48 - 65) | <0.01 |
Male, n (%) | 287 (62.1) | 283 (74.7) | <0.01 |
Smoking status, n (%) | Â | Â | <0.01 |
   Current smoker | 198 (42.9) | 129 (34.0) |  |
   Former smoker | 111 (24.0) | 41 (10.8) |  |
   Never smoker | 153 (33.1) | 209 (55.2) |  |
Pack years, median (IQR) | 38 (0 - 58) | 0 (0 - 34) | <0.01 |
Moderate/heavy drinkers, n (%) | 284 (61.5) | 175 (46.2) | <0.01 |
Exposure to environmental tobacco smoke among non-smokers, n (%) | 99 (64.7) | 135 (64.6) | 0.98 |
Education, median (IQR) | 12 (12 - 16) | 16 (12 - 16) | <0.01 |
Histology, n (%) | Â | Â | Â |
   Adenocarcinoma | 242 (52.4) |  |  |
   Squamous cell carcinoma | 131 (28.4) |  |  |
   Small cell carcinoma | 69 (14.9) |  |  |
   Large cell carcinoma | 20 (4.3) |  |  |