Rate of asynchrony | Overall (n=40) | Mask (n=20) | Helmet (n=20) | p-value |
AI <10% (tracings) | 4.0±3.3% (20) | 4.4±3.3 (9) | 3.6±3.3 (11) | 0.752 |
AI ≥10% (tracings) | 18.1±5.8% (20) | 18.4±5.2% (11) | 17.7±6.9% (9) | |
IE | 33.3% | 25.3% | 44.8% | 0.047 |
AT | 40.5% | 42.2% | 38.0% | 0.665 |
DT | 26.2% | 32.5% | 17.2% | 0.014 |
Data are presented as mean±sd (n), unless otherwise stated. p-values refer to Chi-squared test between interfaces. AI: asynchrony index; IE: ineffective effort; AT: autotriggering; DT: double-triggering.