Table 2.
Sleep parameters during the first and second polysomnograms.
| Sleep Parameter | First PSG | Repeat PSG |
|---|---|---|
| Total sleep time (minutes) | 447.2 | 301 |
| Sleep efficiency (%) | 90.3 | 62.3 |
| Apnea-hypopnea index (per hour) | 2 | 6 |
| Respiratory disturbance index (per hour) | 3 | 6 |
| Central apnea index (per hour) | 2 | 3 |
| NREM supine sleep time (minutes) | 75.4 | 179.5 |
| AHI in NREM supine sleep (per hour) | 2 | 6 |
| NREM nonsupine sleep time (minutes) | 328.3 | 100.5 |
| AHI in NREM nonsupine sleep (per hour) | 2 | 6 |
| REM supine sleep time (minutes) | 14 | 0 |
| AHI in REM supine sleep (per hour) | 0 | - |
| REM nonsupine sleep time (minutes) | 29.5 | 21 |
| AHI in REM nonsupine sleep (per hour) | 4 | 3 |
| Mean oxyhemoglobin saturation (%) | 96 | 96 |
| Minimum oxyhemoglobin saturation (%) | 93 | 92 |
| Arousal index (per hour) | 10.6 | 7 |
| Breathing-related arousals (%) | 25.3 | 22.9 |
| Periodic limb movement index (per hour) | 0 | 1 |
AHI: Apnea-hypopnea index; NREM: non-rapid eye movement sleep; REM: rapid eye movement sleep.