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Table 1 Baseline characteristics of patients with non-positional and positional obstructive sleep apnea

From: Comparison of cardiovascular co-morbidities and CPAP use in patients with positional and non-positional mild obstructive sleep apnea

 

Non-positional

Positional

P-value

 

G1: Mild

G2: Moderate

G3: Severe

G4: Mild

G5: Moderate

G6: Severe

 

(n = 18)

(n = 70)

(n = 178)

(n = 52)

(n = 29)

(n = 24)

Age, years

61.39 ± 15.27

60.9 ± 13.06

56.39 ± 13.54

56.55 ± 13.2

54.76 ± 10.5

55.46 ± 13.95

0.999

Gender

      

0.011*

Female

6(33.33%)

25(35.71%)

34(19.1%)b

18(34.62%)

6(20.69%)

2(8.33%)a

 

Male

12(66.67%)

45(64.29%)

144(80.9%)

34(65.38%)

23(79.31%)

22(91.67%)

 

Neck circumference, cm

37.83 ± 3.63

38.22 ± 3.05

40.55 ± 3.7a,b

37.28 ± 3.05

38.66 ± 2.79

38.58 ± 2.62

<0.001*

Waist circumference, cm

92.64 ± 10.66

97.24 ± 9.08

103.21 ± 11.67a,b

91.99 ± 10.59

95.71 ± 8.34

92.64 ± 5.51c

<0.001*

Hip circumference, cm

99.36 ± 9.95

103.43 ± 9.31

107.4 ± 10.55a,b

100.73 ± 7.5

102.71 ± 6.69

100.02 ± 4.99c

<0.001*

Waist-to-hip ratio, %

0.93 ± 0.06

0.94 ± 0.05

0.96 ± 0.05

0.91 ± 0.07

0.93 ± 0.05

0.92 ± 0.05c

<0.001*

BMI, kg/m2

26.27 ± 4.78

27.58 ± 4.76

29.98 ± 5.19

26.29 ± 3.41

27.74 ± 2.96

26.15 ± 2.78c

<0.001*

Smoking history

      

0.017*

Past-smoker

4(22.22%)

14(20%)

42(23.6%)

9(17.31%)

6(20.69%)

11(45.83%)a

 

Never smoked

8(44.44%)

46(65.71%)

83(46.63%)

34(65.38%)

17(58.62%)

11(45.83%)

 

Current smoker

6(33.33%)

10(14.29%)

53(29.78%)

9(17.31%)

6(20.69%)

2(8.33%)

 

CV co-morbidities

       

Any CV co-morbidity

11(61.11%)

39(55.71%)

113(63.48%)

19(36.54%)

15(51.72%)

17(70.83%)a

0.018*

HTN

11(61.11%)

38(54.29%)

111(62.36%)

18(34.62%)

15(51.72%)

16(66.67%)a

0.015*

Anti-HTN drugs†

11(100%)

37(97.37%)

89(80.18%)b

18(100%)

13(86.67%)

14(87.5%)

0.021*

Dosage of anti-HTN drugs (number of tablets /day)†

2.23 ± 1.40

2.21 ± 1.15

1.98 ± 1.14

1.74 ± 1.24

1.35 ± 0.52

1.77 ± 0.92

0.192

CAD

0(0%)

3(4.29%)

13(7.3%)

0(0%)

1(3.45%)

2(8.33%)

0.394

CVA

2(11.11%)

15(21.43%)

32(17.98%)

4(7.69%)

6(20.69%)

5(20.83%)

0.307

  1. BMI: body mass index; CV: cardiovascular; HTN: hypertension; CAD: coronary artery disease; CVA: cerebrovascular accident.
  2. Results are mean ± standard deviation for continuous variables and number (percentage) for categorical variables.
  3. Intergroup comparisons were made by analysis of variance followed by Bonferroni correction or Dunnett’s test for post-hoc test (continuous variables) or Chi-square / Fisher’s exact tests (categorical variables).
  4. *Indicates a significant between group difference, P < 0.05.
  5. †Only HTN patients were analyzed.
  6. aIndicates significant difference from the mild subgroup within the nonpositional (or positional) group, p < 0.05.
  7. bIndicates significant difference from the moderate subgroup within the nonpositional (or positional) group, p < 0.05.
  8. cIndicates significant difference between the corresponding subgroups of nonpositional and positional groups, p < 0.05.
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BMC Pulmonary Medicine

ISSN: 1471-2466

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