| Non-positional | Positional | Adjusted | ||||
---|---|---|---|---|---|---|---|
 | G1: Mild | G2: Moderate | G3: Severe | G4: Mild | G5: Moderate | G6: Severe | |
(n = 18) | (n = 70) | (n = 178) | (n = 52) | (n = 29) | (n = 24) | P-value1 | |
Daytime sleepiness measurements | Â | Â | Â | Â | Â | Â | Â |
  ESS score | 11.09 ± 1.31 | 9.91 ± 0.66 | 11.06 ± 0.43 | 9.65 ± 0.8 | 10.55 ± 1.02 | 10.24 ± 1.15 | 0.618 |
Overnight polysomnography | Â | Â | Â | Â | Â | Â | Â |
  AHI, episodes/hour | 12.68 ± 3.06 | 24.41 ± 1.55a | 55.98 ± 1.01a,b | 11.93 ± 1.86 | 21.97 ± 2.39a | 44.41 ± 2.69a,b,c | <0.001* |
  Supine AHI, episodes/hour | 17.15 ± 3.54 | 33.98 ± 1.80a | 66.11 ± 1.16a,b | 18.55 ± 2.13 | 34.88 ± 2.76a | 54.55 ± 3.1a,b,c | <0.001* |
  Lateral AHI, episodes/hour | 10.26 ± 4.13 | 14.35 ± 2.10 | 39.29 ± 1.35a,b | 3.73 ± 2.48 | 2.25 ± 3.22c | 5.17 ± 3.62c | <0.001* |
  DI, episodes/hour | 7.07 ± 3.38 | 15.12 ± 1.95 | 45.62 ± 1.27a,b | 7.97 ± 2.33 | 14.90 ± 3.00 | 35.91 ± 3.37a,b | <0.001* |
  AI, episodes/hour | 30.87 ± 3.66 | 36.78 ± 1.86 | 56.65 ± 1.21a,b | 19.50 ± 2.23 | 27.91 ± 2.86 | 46.99 ± 3.23a,b | <0.001* |
  Sleep efficiency, % | 68.83 ± 3.61 | 74.9 ± 1.84 | 77.62 ± 1.19 | 77.16 ± 2.2 | 78.46 ± 2.82 | 78.48 ± 3.18 | 0.224 |
  Sleep latency, minute | 28.85 ± 7.06 | 27.53 ± 3.59 | 22.3 ± 2.33 | 23.64 ± 4.3 | 16.58 ± 5.52 | 24.6 ± 6.22 | 0.601 |
  REM latency, minute | 120.2 ± 17.1 | 134.32 ± 8.83 | 141.17 ± 5.7 | 113.89 ± 10.29 | 126.42 ± 12.99 | 147.72 ± 15.25 | 0.238 |
  S1, % | 22.22 ± 3.18 | 24.01 ± 1.62 | 36.19 ± 1.05a,b | 20.33 ± 1.94 | 23.30 ± 2.49 | 28.61 ± 2.8 | <0.001* |
  S2, % | 62.00 ± 3.16 | 60.83 ± 1.60 | 51.52 ± 1.04a,b | 60.52 ± 1.92 | 59.14 ± 2.47 | 57.84 ± 2.78 | <0.001* |
  S34, % | 3.18 ± 1.35 | 2.72 ± 0.69 | 2.5 ± 0.44 | 4.01 ± 0.82 | 4.13 ± 1.06 | 2.61 ± 1.19 | 0.560 |
  REM, % | 12.60 ± 1.54 | 12.43 ± 0.78 | 9.78 ± 0.51 | 15.14 ± 0.94 | 13.43 ± 1.20 | 10.94 ± 1.35 | <0.001* |
  SaO2 mean, % | 92.92 ± 0.73 | 93.23 ± 0.37 | 90.65 ± 0.24b | 93.91 ± 0.45 | 94.14 ± 0.57 | 93.66 ± 0.65c | <0.001* |
  SaO2 minimal, % | 86.36 ± 1.90 | 81.22 ± 0.97a | 76.02 ± 0.63a,b | 84.56 ± 1.17 | 81.87 ± 1.49 | 76.96 ± 1.67a | <0.001* |
Blood pressure | Â | Â | Â | Â | Â | Â | Â |
  Evening SBP, mmHg | 125.28 ± 3.43 | 127.46 ± 1.74 | 129.23 ± 1.13 | 124.02 ± 2.09 | 123.05 ± 2.68 | 126.01 ± 3.02 | 0.176 |
  Evening DBP, mmHg | 76.84 ± 2.49 | 77.15 ± 1.27 | 79.29 ± 0.82 | 76.47 ± 1.52 | 73.78 ± 1.95 | 78.76 ± 2.19 | 0.138 |
  Evening MABP, mmHg | 92.99 ± 2.61 | 93.92 ± 1.33 | 95.93 ± 0.86 | 92.32 ± 1.59 | 90.2 ± 2.04 | 94.51 ± 2.3 | 0.119 |
  Morning SBP, mmHg | 125.91 ± 3.27 | 126.83 ± 1.66 | 132.44 ± 1.08 | 125.06 ± 1.99 | 122.72 ± 2.56 | 126.56 ± 2.88 | 0.002* |
  Morning DBP, mmHg | 78.37 ± 2.83 | 79.62 ± 1.44 | 83.74 ± 0.93b | 79.06 ± 1.72 | 77.32 ± 2.21 | 80.81 ± 2.49 | 0.033* |
  Morning MABP, mmHg | 94.23 ± 2.79 | 95.35 ± 1.42 | 99.97 ± 0.92 | 94.39 ± 1.70 | 92.47 ± 2.18 | 96.07 ± 2.46 | 0.006* |
  Evening-to-morning SBP difference, mmHg | 0.63 ± 2.67 | -0.63 ± 1.36 | 3.21 ± 0.88 | 1.04 ± 1.63 | -0.33 ± 2.09 | 0.54 ± 2.36 | 0.234 |
  Evening-to-morning DBP difference, mmHg | 1.53 ± 2.15 | 2.47 ± 1.09 | 4.45 ± 0.71 | 2.59 ± 1.31 | 3.54 ± 1.68 | 2.05 ± 1.89 | 0.526 |
  Evening-to-morning MABP difference, mmHg | 1.23 ± 2.11 | 1.43 ± 1.07 | 4.04 ± 0.7 | 2.07 ± 1.28 | 2.26 ± 1.65 | 1.55 ± 1.86 | 0.338 |