Table 3.
Distribution of sleep indices in the daytime and nighttime
| Daytime | Nighttime | P | |
|---|---|---|---|
| Time of recording (min) | 836 ± 174 | 580 ± 32.2 | < 0.001 |
| Total sleep time (min) | 248 ± 239 | 398 ± 125 | 0.002 |
| Sleep efficiency (%) | 28.1 ± 26.4 | 68.6 ± 21.7 | < 0.001 |
| Sleep latency (min) | 57.5 ± 65.8 | 65.6 ± 81.1 | n.s. |
| NREM1 (% of TST) | 22 ± 16.6 | 10.4 ± 10.8 | < 0.001 |
| NREM2 (% of TST) | 46.6 ± 18.1 | 44.6 ± 15 | n.s. |
| SWS (% of TST) | 21.3 ± 17.6 | 29.8 ± 15 | 0.05 |
| REM (% of TST) | 6 ± 10.5 | 15.1 ± 8 | < 0.001 |
| Cycles (n) | 1.7 ± 2.7 | 4.5 ± 3.7 | < 0.001 |
| REM latency (min) | 125.8 ± 145 | 91.2 ± 59 | n.s. |
| Arousals index (ev/h) | 30.6 ± 25.7 | 22.5 ± 16.8 | n.s |
| Noise arousals (ev/h) | 6.6 ± 9.6 | 2.4 ± 3 | n.s. |
| TST90 (% of TST) | 67.7 ± 21.7 | 5.28 ± 11.4 | n.s. |
| ODI (ev/h) | 9.6 ± 17.8 | 9.1 ± 14.6 | n.s. |
SWS, slow wave sleep; TST, total sleep time; TST90, total sleep time with SaO2 < 90%; ODI, oxygen desaturation index.