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Table 1 Baseline clinical data for patients with obstructive sleep apnea (OSA) undergoing off-pump coronary artery bypass grafting (OPCABG)

From: The effects of high-sensitivity C-reactive protein on the clinical outcomes in obstructive sleep apnea patients undergoing off-pump coronary artery bypass grafting

 

Absent-mild OSA

(n = 71)

Moderate-severe OSA

(n = 52)

P value

Total

(n = 123)

Sex (male/female)

55/16

39/13

0.750

94/29

Age (years)

61.3 ± 9.3

62.9 ± 8.2

0.334

62.0 ± 8.88

BMI (kg/m2)

25.5 ± 3.2

25.2 ± 3.7

0.602

25.4 ± 3.4

Body temperature (˚C)

36.4 ± 0.4

36.3 ± 0.4

0.236

36.3 ± 0.4

Hypertension, n (%)

49 (69)

40 (77)

0.333

89 (72)

Diabetes, n (%)

27 (38)

24 (46)

0.366

51 (42)

ACS, n (%)

61 (86)

41 (79)

0.303

102 (83)

Smoking history, n (%)

33 (47)

28 (54)

0.419

61 (50)

Previous stroke, n (%)

9 (13)

2 (4)

0.090

11 (9)

Previous AF, n (%)

3 (4)

4 (8)

0.412

7 (6)

Blood test data

PO2 (mmHg)

94.2 ± 18.2

88.9 ± 25.5

0.183

92.0 ± 21.7

PCO2 (mmHg)

35.5 ± 3.2

37.1 ± 4.4

0.033*

36.2 ± 3.8

HDL (mmol/L)

1.1 ± 0.3

1.0 ± 0.3

0.273

1.0 ± 0.3

LDL (mmol/L)

2.4 ± 1.0

2.5 ± 1.1

0.677

2.4 ± 1.0

Triglyceride (mmol/L)

1.3 (1.1, 1.9)

1.3 (1.0, 1.8)

0.916

1.3 (1.1, 1.8)

Creatinine (µmol/l)

73.3 ± 17.8

76.8 ± 21.4

0.319

74.8 ± 19.4

Hs-CRP (mg/L)

1.1 (0.3, 2.2)

2.0 (0.7, 6.8)

0.001*

1.4 (0.5, 3.5)

Echocardiography data

LVEF (%)

59.5 ± 8.5

55.9 ± 9.8

0.034*

58.0 ± 9.2

LVDD (mm)

48.9 ± 6.7

50.0 ± 5.9

0.326

49.4 ± 6.4

LAD (mm)

36.7 ± 3.8

37.0 ± 4.2

0.645

36.9 ± 4.0

PG test data

AHI (events/h)

7.1 ± 4.1

28.5 ± 11.5

< 0.001*

16.1 ± 13.4

Mean apnea time (s)

17 (14, 24)

24 (19, 30)

< 0.001*

20 (16, 27)

Maximum apnea time (s)

27 (19, 35)

40 (31, 61)

< 0.001*

31 (22, 47)

Lowest SaO2 (%)

87.0 ± 3.7

81.6 ± 5.8

< 0.001*

84.7 ± 5.4

Mean SaO2 (%)

95.4 ± 2.1

93.0 ± 2.4

< 0.001*

94.4 ± 2.5

ODI ≥ 3%

6.1 (3.0, 9.3)

23.3 (18.4, 31.1)

< 0.001*

15.2 ± 13.5

  1. Values are mean (± SD), median (interquartile range), or no. (%)
  2. BMI: body mass index, ACS: acute coronary syndrome, AF: atrial fibrillation, PO2: partial pressure of oxygen, PCO2: partial pressure of carbon dioxide, HDL: high-density lipoprotein, LDL: low-density lipoprotein, Hs-CRP: high-sensitivity C-reactive protein, LVEF: left ventricular ejection fraction, LVDD: left ventricular end diastolic diameter, LAD: left atrium diameter, AHI: apnea hypopnea index, SaO2: arterial oxygen saturation, ODI: oxygen desaturation index
  3. *P < 0.05