Measured H2O2 values in chronic obstructive pulmonary disease (COPD) patients (n=12) and healthy control subjects (n=9) under different conditions, as well as relevant ambient air data
| COPD | Controls | |
| Ambient air pressure Torr | 717.1 (4.6) | 716.8 (3.1) |
| Relative atmospheric humidity % | 45.1 (4.4) | 36.2 (4.0) |
| Temperature K | 298.2 (1.5) | 299.2 (1.3) |
| H2O2 in ambient air µM | 2.774 (1.815) | 4.282 (1.473) |
| H2O2 in ambient air/Γ μM | 0.600 (0.343) | 0.864 (0.335) |
| H2O2 in ambient air × (1−F)/Γ μM | 0.114 (0.065) | 0.164 (0.064) |
| H2O2 in EBC while breathing without filter μM | 0.780 (0.510) | 0.748 (0.317) |
| H2O2 in EBC while breathing with filter μM | 0.420 (0.125) | 0.454 (0.222) |
Data are presented as median (interquartile range). EBC: exhaled breath condensate.