Table 3.
Comparison of sleep data in Group A (CPAP vs. VAuto) and in Group B (Auto-BiPAP vs. VAuto).
| Group A (N = 36) |
Group B (N = 28) |
|||||
|---|---|---|---|---|---|---|
| CPAP | VAuto | p | Auto-BiPAP | VAuto | p | |
| TST, min | 319.5 ± 62.7 | 290.9 ± 89.7 | 0.3 | 302.2 ± 86.3 | 338.3 ± 93.6 | 0.686 |
| SE, % | 73.7 ± 14.9 | 71.9 ± 14.9 | 0.541 | 79.6 ± 12.8 | 72.7 ± 16.0 | 0.048 |
| N1, % | 11.1 ± 5.3 | 14.4 ± 14.3 | 0.675 | 11.4 ± 9.9 | 17.7 ± 14.3 | 0.035 |
| N2, % | 35.1 ± 8.6 | 37.9 ± 9.6 | 0.269 | 37.7 ± 12.5 | 35.0 ± 11.2 | 0.255 |
| N3, % | 28.6 ± 10.9 | 27.5 ± 9.1 | 0.819 | 31.2 ± 14.4 | 26.3 ± 13.9 | 0.06 |
| REM, % | 24.9 ± 9.2 | 20.1 ± 11.1 | 0.043 | 19.5 ± 10.5 | 20.9 ± 10.2 | 0.81 |
| Arousals index, events·h−1 | 22.0 ± 11.2 | 10.5 ± 9.1 | <0.001 | 13.7 ± 9.6 | 5.4 ± 6.0 | 0.001 |
| AHI, events·h−1 | 15.2 ± 12.1 | 7.4 ± 8.5 | <0.001 | 6.1 ± 9.2 | 2.5 ± 2.8 | 0.057 |
| CAHI, events·h−1 | 5.0 ± 8.0 | 4.1 ± 8.1 | 0.54 | 2.0 ± 2.5 | 0.9 ± 1.8 | 0.036 |
| OAHI, events·h−1 | 10.2 ± 10.4 | 3.3 ± 4.3 | <0.001 | 4.1 ± 8.4 | 1.6 ± 1.8 | 0.145 |
| AHI REM, events·h−1 | 19.5 ± 12.5 | 7.4 ± 8.4 | 0.002 | 9.8 ± 13.7 | 2.5 ± 3.4 | 0.071 |
| AHI supine, events·h−1 | 22.7 ± 17.9 | 11.0 ± 14.8 | <0.001 | 11.1 ± 12.6 | 3.9 ± 5.1 | 0.016 |
| ODI, events·h−1 | 15.2 ± 8.8 | 9.4 ± 8.9 | 0.029 | 8.5 ± 10.4 | 2.6 ± 3.0 | 0.009 |
| T90, % | 15.4 ± 27.7 | 7.3 ± 12.2 | 0.097 | 3.5 ± 8.1 | 0.7 ± 3.0 | 0.086 |
| Mean SaO2, % | 92.4 ± 3.0 | 93.2 ± 1.8 | 0.16 | 94.0 ± 1.8 | 94.8 ± 1.3 | 0.032 |
| Nadir, % | 83.3 ± 6.9 | 86.4 ± 4.6 | 0.026 | 86.4 ± 5.5 | 89.3 ± 3.2 | 0.009 |
All data are expressed as mean ± SD. Abbreviations: AHI = apnea–hypopnea index; CAHI = central apnea–hypopnea index; OAHI = obstructive apnea–hypopnea index; ODI = oxygen desaturation index; SE = sleep efficency; T90 = sleep time with oxygen saturation <90%; TST = total sleep time.