eNO concentrations (in ppb) of 100 children of school age measured at three different flow rates on line and off line
| Flow (ml/s) | On line eNO (ppb) | Off line eNO (ppb) |
| 50 | 15.1 (1.1) | 18.7 (1.1) |
| 100 | 11.8 (1.0) | 15.3 (1.1) |
| 150 | 9.6 (1.1) | 13.7 (1.1) |
Values are geometric means (SE).
All differences between methods for a given flow and between flows for each method are significant (p<0.001, ttest).