Table 2. Distribution of sleep parameters on polysomnography.
REM, rapid eye movement; NOD, nocturnal oxygen desaturation; ODI, oxygen desaturation index; AHI, apnea-hypopnea index; PLM, periodic limb movement; SD, standard deviation
| Parameter | Mean + SD | Range |
| Sleep latency (min) | 18.23+25.24 | 0-114.4 |
| Sleep efficiency (%) | 80.09+12.05 | 47.4-97.6 |
| Total sleep time (min) | 317.88+69.065 | 161-457 |
| Staging | ||
| Wake (min) | 66.6+41.78 | 7.5-169 |
| REM (min) | 25.97+20.02 | 0-19.9 |
| Stage N1 (min) | 72.3 + 49.63 | 8.5-195 |
| Stage N2 (min) | 137.5+69.35 | 19-315.5 |
| Stage N3 (min) | 82.45+58.49 | 1.5-212.5 |
| NOD (%) | 12.34+ 21.1 | 0-81.05 |
| ODI/hour | 8.39+ 11.45 | 0-41 |
| Lowest SaO2 (%) | 84.53+ 8.8 | 57-95 |
| AHI or RDI/hour | 12.01+15.52 | 0.2-60.1 |
| PLM index/hour | 1.09+5.02 | 0-27.5 |
| Total arousal index/hour | 6.95+ 4.00 | 0.7-15.7 |
| No. of sound events/hour (sleep) | 45.19+ 102.14 | 0-503.2 |