Table 2 Demographics of the validation study populations (mass and other)
| Â | Validation | |||
|---|---|---|---|---|
CXR finding: mass (n = 100) | CXR finding: other (n = 56) | |||
Control | Lung cancer | Control | Lung cancer | |
Gender | ||||
 Male | 28 | 28 | 22 | 22 |
 Female | 22 | 22 | 6 | 6 |
Age (years) | ||||
 Mean (SD) | 64.0 (4.9) | 63.9 (4.9) | 65.3 (5.5) | 65.1 (4.9) |
Smoking | ||||
 Ever smokers | 45 | 45 | 28 | 28 |
 Never smokers | 5 | 5 | – | – |
 Pack years mean (SD) | 50.6 (35.1) | 58.2 (37.9) | 54.8 (32.9) | 52.3 (30.9) |
Abnormal suspicious finding | ||||
 Mass | 50 | 50 | – | – |
 Pleural Mass | – | – | 2 | 2 |
 Hilar | – | – | 9 | 9 |
 Infiltrate | – | – | 17 | 17 |
Stage | ||||
 I (%) |  | 16 (32.0) |  | 9 (32.1) |
 II (%) |  | 4 (8.0) |  | 3 (10.7) |
 III (%) |  | 16 (32.0) |  | 3 (10.7) |
 IV (%) |  | 10 (20.0) |  | 8 (28.6) |
 NA |  | 4 (8.0) |  | 5 (17.9) |
Histology | ||||
 Adenocarcinoma (%) |  | 24 (48.0) |  | 12 (42.9) |
 BAC (%) |  | 3 (6.0) |  | 2 (7.1) |
 Squamous cell (%) |  | 9 (18.0) |  | 7 (25.0) |
 Large cell (%) |  | 4 (8.0) |  | 1 (3.6) |
 NSCLC (%) |  | 6 (12.0) |  | 1 (3.6) |
 Small cell (%) |  | 4 (8.0) |  | 5 (17.9) |