| Group | No serum samples | S100A7 (OD values) |
| Squamous cell carcinomas | 53 | 0.296 (0.119)** |
| I/II | 30 | 0.293 (0.103) |
| III/IV | 23 | 0.300 (0.136) |
| Adenocarcinomas | 39 | 0.191 (0.052) |
| I/II | 19 | 0.190 (0.036) |
| III/IV | 20 | 0.192 (0.065) |
| Small cell carcinomas | 20 | 0.183 (0.058) |
| I/II | 0 | |
| III/IV | 20 | 0.183 (0.058) |
| Benign lung diseases | 20 | 0.188 (0.053) |
| Healthy controls | 31 | 0.182 (0.046) |
Values are mean (SD).
**p<0.001 compared with the other cell types of lung cancer and control groups.