Table 1 Characteristics of the 103 lung cancer patients and 265 controls.
| Â | Cases, N (%) | Controls, N | pvalue |
|---|---|---|---|
Smoking status |  |  | < 0.001 ξ |
   Never | 6 (5.8) | 69 (26.1) |  |
   Former | 36 (34.9) | 128 (48.2) |  |
   Current | 61 (59.2) | 68 (25.7) |  |
Pack-years (PY) | 61.2 ± 28.5 | 29.9 ± 21.4 | < 0.001 ‡ |
Current and Former Smoking |  |  | < 0.001 ξ |
   Moderate (≤50 PY) | 30 (29.1) | 137 (51.8) |  |
   Heavy (>50 PY) | 67 (65) | 59 (22.1) |  |
Family history of tumours |  |  | < 0.001 ξ |
   Yes | 47 (45.6) | 66 (24.9) |  |
   No | 56 (54.4) | 199 (75.1) |  |
Histological tumour type | Â | Â | Â |
   Squamous cell carcinoma | 49 (47.6) |  |  |
   Large cell carcinoma | 23 (22.3) |  |  |
   Adenocarcinoma | 16 (15.5) |  |  |
   Small cell carcinoma | 15 (14.6) |  |  |