TABLE 2.
POLYSOMNOGRAPHIC DATA (N = 51)
| Baseline | On PAP | P Value | |
| Sleep efficiency, % total sleep time | 82 ± 11 | 83 ± 18 | 0.81 |
| Arousal index, N/hr | 23 ± 15 | 16 ± 18 | 0.019 |
| Stage N1, % TST | 8.8 ± 5.9 | 6.1 ± 6.7 | <0.001 |
| Stage N2, % TST | 49.1 ± 9.9 | 46.7 ± 11.2 | 0.16 |
| Stage N3, % TST | 22.3 ± 8.8 | 24.6 ± 13.5 | 0.18 |
| Rapid eye movement sleep, % TST | 19.7 ± 6.9 | 22.5 ± 7.5 | 0.036 |
| Apnea hypopnea index, N/hr | 18.1 ± 14.7 | 2 ± 2.3 | <0.001 |
| SpO2 nadir, % | 80 + 13 | 90 ± 4 | <0.001 |
| Time with SpO2 <90%, % TST | 4.9 ± 9.1 | 0.1 ± 0.5 | 0.001 |
| Peak end-tidal CO2, mm Hg | 57 ± 5 | 55 ± 5 | 0.027 |
| Time with end-tidal Pco2 >50 mm Hg, % TST | 16.7 ± 22.4 | 12 ± 19.6 | 0.42 |
Definition of abbreviations: PAP = positive airway pressure; SpO2 = oxygen saturation as measured by pulse oximetry; TST = total sleep time.
Data are shown as mean ± SD. Significant P values shown in bold.