Table 1 Characteristics of the study participants according to MAI quartiles.

From: Independent Association between Sleep Fragmentation and Dyslipidemia in Patients with Obstructive Sleep Apnea

Characteristic

MAI ≤ 14.0

14.0 < MAI ≤ 26.5

26.5 < MAI ≤ 45.3

MAI > 45.3

P-value for trenda

No. patients

671

673

673

669

–

Demographics

 Age, y

42.92 ± 12.32

42.85 ± 12.02

43.54 ± 12

42.84 ± 10.95

0.054

 Male

65.28

78.6

86.78

90.88

<0.001

 BMI, kg/m2

25.11 ± 3.66

26 ± 3.54

26.47 ± 3.48

27.9 ± 3.74

<0.001

 Abdominal obesity, %

75.86

86.18

90.49

95.96

<0.001

Medical history

 Hypertension, %

21.61

24.37

32.69

37.67

<0.001

 Diabetes, %

6.11

7.43

7.58

11.51

<0.001

 Current smokers, %

20.57

29.12

33.14

33.33

<0.001

 Current alcohol consumers, %

4.02

6.24

8.77

8.97

<0.001

Sleep parameters

 Apnea hypopnea index

13.25 ± 18.56

23.44 ± 22.41

34.92 ± 22.93

57.23 ± 25.07

<0.001

 Oxygen desaturation index

14.13 ± 20.46

24 ± 23.85

36.97 ± 23.85

59.53 ± 27.4

<0.001

  1. Data are presented as means ± SD or percentages. BMI, body mass index; MAI, microarousal index.
  2. aTested using the polynomial linear trend test for continuous variables and the linear-by-linear association test for dichotomous variables.
Back to article page