Table 1.
Baseline clinical and polysomnographic characteristics of the study sample (mean ± SEM)
| OSAS | Control | P value | |
|---|---|---|---|
| Age | 51.1 ± 1.2 | 48.4 ± 3.0 | NS |
| Body mass index, kg/m2 | 32.5 ± 0.9 | 31.6 ± 1.8 | NS |
| Smoking habits (pack-years) | 17.3 ± 1.9 | 19.5 ± 7.0 | NS |
| Epworth sleepiness scale | 11.2 ± 5.9 | 5.6 ± 0.7 | <0.05 |
| Total sleep time (TST), h | 6.2 ± 0.9 | 6.5 ± 0.8 | NS |
| Sleep efficiency, % | 82.5 ± 1.3 | 73.3 ± 4.3 | NS |
| Stages 3 and 4 (%TST) | 8.5 ± 1.1 | 18.5 ± 2.4 | <0.05 |
| Rapid eye movement (%TST) | 10.5 ± 1.7 | 19.2 ± 1.7 | <0.05 |
| AHI, per hour | 43.5 ± 3.6 | 2.8 ± 0.4 | <0.0001 |
| Duration in apnea–hypopnea, min | 124.4 ± 13.3 | 5.3 ± 1.1 | <0.0001 |
| Arousal, per hour | 39.2 ± 2.7 | 14.7 ± 1.3 | <0.0001 |
| Baseline oxygen saturation, % | 92.7 ± 0.5 | 93.6 ± 0.9 | NS |
| Average oxygen saturation % in sleep | 86.8 ± 1.1 | 92.2 ± 1.5 | <0.05 |
| Average desaturation, % | 11.6 ± 1.2 | 3.9 ± 1.4 | <0.0001 |
| Oxygen saturation <90%, length of time, min | 98.6 ± 16.4 | 37.8 ± 17.4 | <0.05 |
NS: Statistically insignificant