Table 1 Demographic and polysomnographic characteristics of OSA patients

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