Table 1 Demographic, physical examination, and sleep study data

 Sex

.219

  Male

166 (72.2%)

122 (70.1%)

44 (78.6%)

  Female

64 (27.8%)

52 (29.9%)

12 (21.4%)

 Age, years

48.37 ± 11.50

48.71 ± 11.30

47.34 ± 12.14

.416

 BMI, kg/m²

27.50 ± 4.33

26.68 ± 3.85

30.05 ± 4.76

< 0.001

 Neck circumference, cm

38.26 ± 3.84

37.70 ± 3.47

40.01 ± 4.42

.002

 Epworth Sleepiness Scale

9.94 ± 4.53

10.08 ± 4.23

9.52 ± 5.39

.112

 Tonsil Size

1.39 ± 0.69

1.40 ± 0.68

1.38 ± 0.73

.778

 Modified Mallampati score

3.16 ± 0.61

3.09 ± 0.62

3.38 ± 0.56

.003

 AHI, events/hr

36.52 ± 23.44

29.94 ± 16.96

56.98 ± 28.64

< 0.001

 Supine AHI, events/hr

48.36 ± 25.39

43.86 ± 22.47

62.32 ± 28.89

< 0.001

 Lateral AHI, events/hr

18.72 ± 24.22

8.15 ± 8.32

51.56 ± 27.82

< 0.001

 ODI, events/hr

30.14 ± 23.54

23.16 ± 16.41

51.84 ± 28.76

< 0.001

 Minimal SaO₂, %

77.74 ± 9.67

79.74 ± 8.75

71.52 ± 9.80

< 0.001

 T < 90%, %

15.09 ± 18.53

10.03 ± 12.63

30.80 ± 24.41

< 0.001