Table 1 Univariate analysis of demographic, clinical characteristics and comorbidities of the CAD patients according to SA status

Age, years

57 ± 9

56 ± 9

59 ± 9

<0.001

Age over 60 years, n (%)

344 (47)

191 (40)

153 (50)

χ² = 8.2 p = 0.004

Male gender, n (%)

586 (76)

338 (72)

248 (83)

0.001

BMI, kg/m²

30.0 ± 4.8

29.4 ± 4.6

31.0 ± 5.0

<0.001

BMI, n (%):

χ² = 11.8 p = 0.003

 Normal (<25 kg/m²)

104 (13.5)

78 (16.5)

26 (8.7)

 Overweight (25–24.9 kg/m²)

305 (39.5)

189 (40.0)

116 (38.7)

 Obese (≥30 kg/m²)

363 (47.0)

205 (43.4)

158 (52.7)

Coronary artery disease (CAD), n (%):

χ² = 3.8 p = 0.43

 Stable angina pectoris

230 (29.8)

140 (29.7)

90 (30.0)

 First myocardial infarction

729 (94.4)

278 (58.8)

173 (57.7)

 Previous myocardial infarction

91 (11.7)

54 (11.5)

37 (12.3)

NYHA class, n (%):

χ² = 4.8 p = 0.09

 I

65 (8.4)

48 (10.2)

17 (5.7)

 II

598 (77.5)

359 (76.4)

239 (79.9)

 III

106 (13.7)

63 (13.4)

43 (14.4)

LVEF ≤45%, n (%)

175 (22.7)

95 (20.1)

80 (26.7)

χ² = 4.5 p = 0.034

Hypertension n (%)

641 (83.0)

369 (78.2)

272 (90.7)

χ² = 20 p < 0.001

Diabetes mellitus, n (%)

165 (21.4)

102 (21.6)

63 (21.0)

χ² = 0.04 p = 0.84

History of smoking, n (%)

97 (12.6)

67 (14.3)

30 (10.0)

χ² = 2.9 p = 0.08

Median (IQR) Epworth Sleepiness Scale, score

6 (4–9)

6 (3–8)

6 (4–9)

0.006^a

Excessive day time sleepiness ESS > 10, n (%)

131 (17)

74 (15.7)

57 (19.0)

χ² = 1.4 p = 0.14