Table 1.
Clinical and demographic characteristics of the lung cancer cases and controls used in the training set and test set
| Variable | Training set | Test set |
|---|---|---|
| Cases | 280 | 75 |
| Age (yr) | 66 (25–82) | 64 (38–83) |
| Gender, female/male | 108/172 | 31/44 |
| TNM stage | ||
| 1 | 145 | 17 |
| 2 | 31 | 11 |
| 3 | 44 | 18 |
| 4 | 60 | 29 |
| Histology | ||
| Adenocarcinoma | 181 | 49 |
| Squamous cell carcinoma | 87 | 22 |
| Large cell carcinoma | 4 | - |
| Neuroendocrine carcinoma | 2 | - |
| Others | 6* | 4† |
| Controls | 515 | 75 |
| Age (yr) | 56 (38–79) | 56 (39–77) |
| Gender, female/male | 219/296 | 28/47 |
Values are presented as number only or median (range).
*
Other histology in training set includes mucoepidermoid carcinoma (n = 1), non-small cell lung cancer (NSCLC), not otherwise specified (n = 1), sarcomatoid carcinoma (n = 2), synchronous squamous cell carcinoma and adenocarcinoma (n = 1), and adenosquamous carcinoma (n = 1).
†
Other histology in test set includes NSCLC, not otherwise specified (n = 2), combined small cell carcinoma and adenocarcinoma (n = 1), sarcomatoid carcinoma with adenocarcinoma (n = 1), and sarcomatoid carcinoma combined with squamous cell carcinoma (n = 1).