TABLE 2.
POLYSOMNOGRAPHY
| OSAS (n = 22) | Control Subjects (n = 22) | P Value | |
|---|---|---|---|
| Total sleep time, h | 6.3 ± 1.5 | 6.2 ± 0.7 | NS |
| Sleep efficiency, % | 78.5 ± 16.5 | 84.3 ± 8.2 | NS |
| Apnea index, events/h | 3.1 ± 5.4 | 0.2 ± 0.4 | NS |
| Apnea–hypopnea index | 16.3 ± 12.8 | 1.1 ± 1.1 | <0.001 |
| Baseline SpO2, % | 98.8 ± 1.4 | 98.5 ± 1.2 | NS |
| SpO2 nadir, % | 85.2 ± 6.1 | 94.2 ± 2.9 | <0.001 |
| Baseline ETco2, mm Hg | 38.7 ± 7.7 | 41.2 ± 2.5 | NS |
| Peak ETco2, mm Hg | 50.1 ± 4.4 | 47.6 ± 3.9 | NS |
| Arousal index, events/h | 15.7 ± 12.1 | 8.0 ± 4.2 | <0.05 |
Definition of abbreviations: ETco2 = end-tidal carbon dioxide; NS = not significant; OSAS = obstructive sleep apnea syndrome; SpO2 = oxygen saturation as measured by pulse oximetry;
Data shown represent means ± SD.