Subjective versus objective evaluationof NIV efficacy
| SpO2-TcPCO2 | PaCO2 | Leak | ||||
| N | AN | N | AN | N | AN | |
| Effective | 52 | 46 | 53 | 45 | 69 | 29 |
| Perceived quality of ventilation | ||||||
| Total | 68±1 | 71±1 | 68±2 | 71±1 | 69±1 | 71±2 |
| Synchrony | 35±1 | 36±1 | 35±1 | 36±1 | 35±1 | 36±1 |
| Leaks | 17±1 | 19±1 | 17±1 | 19±1 | 18±1 | 18±1 |
| Effectiveness | 16±1 | 16±1 | 16±1 | 16±1 | 16±1 | 17±1 |
| Sleep Quality | 17±1 | 17±1 | 17±1 | 17±1 | 16±1 | 19±2 |
N:normal, AN:anormal