Table 1 Demographic features according to positional and REM dependency.

From: Comparison of polysomnographic and cephalometric parameters based on positional and rapid eye movement sleep dependency in obstructive sleep apnea

Variable

Positional dependency

REM dependency

Positional (n = 111)

Non-positional (n = 22)

P value

REM-related (n = 53)

Not-REM-related (n = 80)

P value

Age (years)a

43.5 ± 12.9

46.2 ± 8.9

0.349

40.1 ± 11.0

46.5 ± 12.5

0.003*

Age group (> 55 years old)b

87.5%

12.5%

0.764

25.0%

75.0%

0.101

Gender (male-to-female ratio)b

83.8%

90.9%

0.526

81.1%

87.5%

0.314

BMI (kg/m2)a

24.9 ± 3.3

27.2 ± 3.1

0.003*

25.5 ± 3.3

25.1 ± 3.5

0.565

Neck circumference (cm)a

36.6 ± 6.7

39.7 ± 2.9

0.074

37.2 ± 3.8

37.0 ± 7.4

0.911

ESSa

8.5 ± 4.5

7.3 ± 3.3

0.255

8.0 ± 3.6

8.5 ± 4.7

0.565

ESS > 10b

93.3%

6.7%

0.081

36.7%

63.3%

0.759

  1. REM, rapid eye movement sleep; BMI, body mass index; ESS, Epworth sleepiness scale.
  2. aResults were obtained from independent T-test: mean ± SD.
  3. bResults were obtained from Chi-square test.
  4. *Significant difference: p < 0.05.
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