Table 2.
Analysis of PSG Results Among All Groups
| PSG Index | OSA Group | Control Group (n=44) |
P1 | P2 | P3 | |||
|---|---|---|---|---|---|---|---|---|
| Mild Group (n=25) |
Moderate Group (n=20) | Severe Group (n=18) |
Total (n=63) |
|||||
| AHI (event/h) | 9.10(5.75,12.55) | 19.55(17.08,24.93) | 37.70(28.80,48.43) | 17.60(9.20,29.20) | 1.30(0.63,3.00) | <0.001 | <0.001 | <0.001 |
| LSaO2(%) | 87.39±1.63 | 82.06±1.96 | 77.10±1.24 | 82.92±4.43 | 96.29±1.79 | <0.001 | <0.001 | 0.009 |
| ODI (event/h) | 8.11(6.01,10.46) | 12.32(9.13,15.09) | 35.13(26.66,50.99) | 12.79(8.19,20.35) | 2.78(1.20,4.00) | <0.001 | <0.001 | <0.001 |
| SL (min) | 10.50(7.00,28.00) | 13.00(5.13,20.00) | 11.25(5.75,15.00) | 11.50(6.50,20.00) | 21.30(15.70,26.58) | <0.001 | 0.301 | 0.510 |
| SE (%) | 91.10(84.20,94.50) | 85.55(82.10,93.03) | 79.35(75.48,87.48) | 86.70(78.90,92.90) | 89.00(88.10,93.00) | 0.003 | 0.006 | 0.118 |
| WASO (min) | 45.36±15.17 | 55.30±17.50 | 76.86±13.79 | 57.52±20.12 | 16.59±7.60 | <0.001 | <0.001 | <0.001 |
| AI (event/h) | 15.00(8.25,20.60) | 20.85(16.65,25.83) | 26.70(18.10,38.50) | 19.20(12.90,27.60) | 13.50(7.58,19.60) | 0.001 | 0.003 | 0.113 |
| N1% | 5.80(4.45,7.50) | 7.70(4.90,10.88) | 12.65(9.80,14.85) | 7.5(5.30,12.00) | 4.00(3.60,4.58) | <0.001 | <0.001 | 0.002 |
| N2% | 60.40(56.70,69.15) | 63.95(55.93,73.88) | 74.50(65.55,78.88) | 65.80(58.00,75.00) | 53.60(52.20,54.40) | <0.001 | 0.003 | 0.021 |
| N3% | 16.50(8.65,19.85) | 11.60(8.63,17.08) | 5.15(3.03,11.43) | 11.50(5.00,17.80) | 20.30(18.93,21.98) | <0.001 | 0.002 | 0.041 |
| REM% | 16.21±4.59 | 14.99±5.52 | 11.77±5.47 | 12.91±6.56 | 22.69±1.53 | <0.001 | 0.008 | 0.063 |
Notes: P1 was the p-value produced when comparing OSA group with control group, P2 was the p-value obtained when comparing severe group with mild group, P3 was the p-value obtained when comparing severe group with moderate group. Differences of P<0.05 indicated statistical significance.
Abbreviations: AHI, apnea hypopnea index; SE, sleep efficiency; WASO, wake after sleep onset; SL, sleep latency; LSaO2, the lowest blood oxygen saturation; ODI, oxygen desaturation index; N1%, percentage of non-rapid eye movement sleep N1 stage; N2%, percentage of non-rapid eye movement sleep N2 stage; N3%, percentage of non-rapid eye movement sleep N3 stage; REM%, percentage of rapid eye movement sleep; AI, arousal index.