Table 2. The clinical characteristics of NC and OSA of different severity.
| Parameter | NC group (n=10) | OSA mild group (n=10) | OSA moderate group (n=11) | OSA severe group (n=10) |
|---|---|---|---|---|
| Age (years) | 36.80±13.21 | 50.80±12.16 | 43.55±15.27 | 40.50±9.28 |
| BMI (kg/m2) | 22.28±1.40 | 23.18±1.97 | 26.19±2.53** | 27.35±5.02** |
| Neck circumference (cm) | 37.30±3.62 | 34.80±4.23 | 38.23±2.52 | 38.85±3.71 |
| Friedman | 1.20±0.42 | 2.10±1.20 | 2.91±0.83** | 2.60±0.84* |
| AHI (events/h) | 2.24±0.94 | 5.62±2.37 | 22.59±2.84** | 54.42±15.53**†† |
| ODI (events/h) | 1.37±0.83 | 4.27±2.94 | 17.08±8.29* | 51.29±26.31**†† |
| TS90 (%) | 1.13±3.15667 | 0.114±0.18992 | 2.2364±1.0312†† | 27.54±24.61**†† |
| LSaO2 (%) | 89.80±2.94 | 89.20±2.20 | 80.55±5.09**† | 66.30±17.24**†† |
| MSaO2 (%) | 94.30±1.25 | 95.00±1.70 | 94.55±1.21 | 91.60±2.91† |
All data were expressed as mean ± standard deviation. *P<0.05, **P<0.01, NC verse other groups; †P<0.05, ††P<0.01, OSA mild group verse OSA medium group or OSA severe group. BMI, body mass index; NC, normal control; AHI, apnea hypopnea index; ODI, oxygen desaturation index; LSaO2, lowest oxygen saturation; MSaO2, mean oxygen saturation; OSA, obstructive sleep apnea.