Concentration of VOCs in exhaled breath of patients with lung cancer, COPD, pneumonia and control group (ppb)
| Lung cancer | COPD | Pneumonia | Control | |
| Methanol | 3499 (983-12312) | 24392 (4901-121061) | 53400* (6490-438221) | 62196* (6052-637319) |
| Ethanol | 28425 (13076-60405) | 111510* (43000-28467) | 262548* (75798-902880) | 220506* (59764-805827) |
| p-xylole | 0.20 (0.06-0.36) | 0.62* (0.38-0.89) | 0.55* (0.26-0.91) | 0.39 (0.12-0.73) |
| Decane | 0.08 (0-0.23) | 0.33 (0.11-0.58) | 0.39 (0.10-0.74) | 0.14 (0-0.44) |
| Dodecane | 0.24 (0.02-0.51) | 0.85* (0.44-1.37) | 1.30* (0.66-2.17) | 0.95* (0.38-1.75) |
| Tridecane | 0.34 (0.03-0.73) | 1.11* (0.52-1.92) | 1.64* (0.72-3.03) | 1.34* (0.49-2.65) |
| Isopentane | 0.36 (0.19-0.54) | 0.68* (0.43-0.97) | 0.57 (0.27-0.94) | 0.70 (0.36-1.11) |
All concentrations ar expressed in ppb (95% CI) * p<0.05 compared to lung cancer group