Table 1 Baseline characteristics of participants

Age (years)

56.15 ± 13.11

54.99 ± 13.97

57.47 ± 11.95

0.002

Sex (%)

0.004

 Female

466 (44.30%)

225 (40.18%)

241 (48.98%)

 Male

586 (55.70%)

335 (59.82%)

251 (51.02%)

Martial Status (%)

0.042

 Single

43 (4.09%)

31 (5.54%)

12 (2.44%)

 Married

929 (88.31%)

490 (87.50%)

439 (89.23%)

 Divorce

12 (1.14%)

8 (1.43%)

4 (0.81%)

 Widowed

67 (6.37%)

30 (5.36%)

37 (7.52%)

Education (%)

0.171

 Less than high school

499 (47.43%)

253 (45.18%)

246 (50.00%)

 High school

292 (27.76%)

156 (27.86%)

136 (27.64%)

 More than high school

261 (24.81%)

151 (26.96%)

110 (22.36%)

Waist circumference(%)

0.124

  < 95 cm

839 (79.75%)

461 (82.32%)

378 (76.83%)

 95-100 cm

98 (9.32%)

43 (7.68%)

55 (11.18%)

  > 100 cm

79 (7.51%)

40 (7.14%)

39 (7.93%)

Physical exercise (%)

0.524

 5–7 days per week

588 (55.89%)

316 (56.43%)

272 (55.28%)

 3–4 days per week

101 (9.60%)

57 (10.18%)

44 (8.94%)

 1–2 days per week

108 (10.27%)

61 (10.89%)

47 (9.55%)

  ≤ 3 days per month

77 (7.32%)

35 (6.25%)

42 (8.54%)

 never exercising

177 (16.83%)

91 (16.25%)

86 (17.48%)

Cigarette smoking(%)

 < 0.001

 No

805 (76.52%)

449 (80.18%)

356 (72.36%)

 Former

66 (6.27%)

38 (6.79%)

28 (5.69%)

 Current

181 (17.21%)

73 (13.04%)

108 (21.95%)

Alcohol use (%)

0.102

 No

818 (77.76%)

447 (79.82%)

371 (75.41%)

 Former

23 (2.19%)

14 (2.50%)

9 (1.83%)

 Current

211 (20.06%)

99 (17.68%)

112 (22.76%)

Diabetes(%)

0.141

 No

905 (86.03%)

490 (87.50%)

415 (84.35%)

 Yes

147 (13.97%)

70 (12.50%)

77 (15.65%)

Hypertension(%)

0.003

 No

640 (60.84%)

364 (65.00%)

276 (56.10%)

 Yes

412 (39.16%)

196 (35.00%)

216 (43.90%)

MeanSpO2

95.42 ± 2.02

95.59 ± 1.96

95.23 ± 2.06

0.004

MinSpO2

81.85 ± 4.96

81.95 ± 4.80

81.75 ± 5.14

0.514

T90%

5.06 ± 10.32

4.98 ± 9.98

5.16 ± 10.71

0.789

T90(s)

1060.07 ± 2053.64

1039.48 ± 1979.30

1083.51 ± 2136.89

0.729

ODI( events/h)

13.80 ± 7.59

13.46 ± 7.16

14.18 ± 8.04

0.122

Total cholesterol (mg/dL)

5.65 ± 1.07

5.21 ± 0.67

6.16 ± 1.20

 < 0.001

HDL-C (mg/dL)

1.34 ± 0.38

1.45 ± 0.33

1.21 ± 0.40

 < 0.001

LDL-C (mg/dL)

3.30 ± 0.87

3.01 ± 0.57

3.64 ± 1.01

 < 0.001

Triglycerides (mg/dL)

1.66 ± 1.25

1.14 ± 0.41

2.25 ± 1.58

 < 0.001

AST (U/L)

24.78 ± 10.72

24.19 ± 11.69

25.45 ± 9.47

0.057

Fasting blood glucose(mmol/L)

6.00 ± 1.45

5.88 ± 1.25

6.13 ± 1.65

0.006

Creatinine(umol/l)

74.66 ± 22.75

72.93 ± 23.25

76.63 ± 22.02

0.008