Table 1.
Baseline characteristics of study population.
| Variables | Control | OSAS | ||
|---|---|---|---|---|
| Total | Mild to Moderate | Severe | ||
| Subjects, n | 20 | 44 | 23 | 21 |
| Age (years) | 45.80 ± 23.01 | 46.43 ± 18.22 | 44.90 ± 20.64 | 48.07 ± 11.28 |
| BMI (kg/m2) | 26.90 ± 4.25 | 28.15 ± 5.34 | 28.55 ± 6.29 | 27.82 ± 5.01 |
| Neck circumference (cm) | 41.15 ± 5.63 | 43.93 ± 5.72 | 43.58 ± 6.22 | 44.13 ± 5.19 |
| AHI (episodes/h) | 2.26 ± 1.30 | 40.41 ± 20.68* | 23.12 ± 6.93‡ | 59.33 ± 12.59†§ |
| Nadir SaO2 (%) | 94.78 ± 3.49 | 76.24 ± 7.56* | 80.65 ± 8.19‡ | 71.56 ± 7.87†§ |
| SaO2 < 90% (%TST) | 1.06 ± 0.93 | 17.63 ± 8.32* | 7.72 ± 7.43‡ | 28.52 ± 10.37†§ |
| ESS scores | 4.93 ± 2.05 | 14.74 ± 1.74* | 13.80 ± 1.92‡ | 15.95 ± 1.63§ |
Values are expressed as mean ± SD.
*P < 0.05, Control versus total OSAS;
† P < 0.05, Mild to Moderate OSAS versus Severe OSAS;
‡ P < 0.05, Control versus Mild to Moderate OSAS;
§ P < 0.05, Control versus Severe OSAS.
Definition of abbreviations: AHI: apnoea hypopnoea index; BMI: body mass index; ESS, Epworth sleepiness scale; nadir: lowest oxygen saturation recorded; OSAS: obstructive sleep apnoea syndrome; TST: total sleep time.