Table 2.
Means and Standard Deviations for Sleep Measures Under Baseline, CPAP, and ASV Conditions
| BASELINE | CPAP | ASV | |
|---|---|---|---|
| Total sleep time (h) | 5.0 ± 1.7 | 5.4 ± 1.6 | 6.1 ± 1.6 |
| Sleep efficiency (%) | 79.3 ± 12.8 | 79.1 ± 16.6 | 79.9 ± 15.9 |
| Stage 1 NREM (%) | 8.4 ± 7.8 | 8.6 ± 12.0 | 7.8 ± 5.9 |
| Stage 2 NREM (%) | 73.5 ± 12.5 | 79.3 ± 15.9 | 73.6 ± 14.6 |
| Stage 3 NREM (%) | 6.0 ± 10.8 | 3.7 ± 5.5 | 7.5 ± 9.8 |
| Stage REM (%) | 12.0 ± 10.9 | 7.9 ± 10.6 | 11.0 ± 9.8 |
| Arousal index | 16.0 ± 14.3 | 19.2 ± 18.5 | 13.4 ± 6.7 |
| PLMS index | 11.4 ± 18.0 | 12.5 ± 18.7 | 35.1 ± 34.1 |
Total sleep time = total sleep time recorded during only room air phase of study (unless the whole study was performed using oxygen); sleep efficiency % = (total sleep time/total recording time)*100; stage 1-3 NREM and stage REM % = (sleep stage time/total sleep time)*100; arousal index = (number of arousals/total sleep time)*100; PLMS = periodic limb movement index = (number of periodic limb movements/total sleep time)*100. No significant differences (p < 0.01) for sleep variables.