TABLE 1.
Characteristics of subjects in the training and testing sets
| Training set | Testing set | |||||
|---|---|---|---|---|---|---|
| NSCLC | Healthy control | p value | NSCLC | Healthy control | p value | |
| (N = 60) | (n = 50) | (N = 90) | (n = 70) | |||
| Age (years) | ||||||
| Mean ± SD | 65.7 ± 11.2 | 61.4 ± 8.5 | 0.168 | 66.2 ± 8.9 | 61.9 ± 10.5 | 0.153 |
| Gender | ||||||
| Female | 32 (53%) | 28 (56%) | 0.426 | 46 (51%) | 38 (54%) | 0.637 |
| Male | 28 (47%) | 22 (44%) | 44 (49%) | 32 (46%) | ||
| Smoking status | ||||||
| Nonsmoker | 24 (40%) | 22 (44%) | 0.655 | 42 (47%) | 28 (40%) | 0.425 |
| Smoker | 36 (60%) | 28 (56%) | 48 (53%) | 42 (60%) | ||
| Histology | ||||||
| Adenocarcinoma | 34 (57%) | NA | 51 (57%) | NA | ||
| SCC | 26 (43%) | NA | 39 (43%) | NA | ||
| TNM stage | ||||||
| I | 19 (32%) | NA | 31 (35%) | NA | ||
| II | 26 (43%) | NA | 38 (42%) | NA | ||
| IIIA | 15 (25%) | NA | 21 (23%) | NA | ||
Abbreviations: NA, not assessed; SCC, squamous cell carcinoma; TNM, tumor node metastasis.