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Table 1 Demographic and polysomnographic characteristics of OSA patients

From: Polysomnographic and clinical characteristics of positional obstructive sleep apnea patients

  Non-POSA
(n = 192)
POSA
(n = 88)
p value
Age (years) 50.9 ± 10.96 46.78 ± 9.66 < 0.001
Female/male 75 (39%)/117 (61%) 27(31%)/61(69%) 0.176
BMI (kg/m2) 33.3 ± 6.45 29.39 ± 3.80 < 0.001
Epworth Sleepiness Scale score 8.44 ± 6.21 7.74 ± 5.19 0.655
Total recording time(min) 389.38 ± 88.83 422.40 ± 30.59 0.001
Total sleep time(min) 296.09 ± 94.12 348.68 ± 63.44 < 0.001
Sleep efficiency (%) 80.46 ± 51.90 82.26 ± 12.95 < 0.001
Sleep latency (min) 31.42 ± 27.69 30.39 ± 36.32 0.145
REM latency (min) 132.54 ± 82.46 118.73 ± 63.27 0.312
Total apnea hypopnea index 39.99 ± 27.52 15.56 ± 10.61 < 0.001
Apnea index 26.55 ± 27.95 8.81 ± 12.35 < 0.001
Supine apnea hypopnea index 53.41 ± 35.57 32.72 ± 21.49 < 0.001
Non supine apnea hypopnea index 30.44 ± 28.94 3.40 ± 3.72 < 0.001
sleep time with oxygen saturation below 90% (TST90) 26.38 ± 32.20 6.74 ± 13.74 < 0.001
Oxygen desaturation index 35.32 ± 27.27 12.18 ± 10.72 < 0.001
Minimum saturation (%) 76.91 ± 11.91 84.97 ± 6.37 < 0.001
Mean saturation (%) 91.13 ± 4.58 93.88 ± 1.73 < 0.001
Mean heart rate 69.91 ± 10.19 64.87 ± 8.89 < 0.001
Periodic limb movement index 12.08 ± 22.01 3.52 ± 6.72 0.001
N1(min) 7.80 ± 7.26 6.21 ± 7.36 < 0.001
N2(min) 62.67 ± 13.04 55.24 ± 10.34 < 0.001
N3(min) 16.39 ± 10.10 21.45 ± 8.51 < 0.001
REM(min) 13.64 ± 7.78 17.43 ± 6.23 < 0.001