Table1 Characteristics of the study population

Age (years)

52.0(51.2–52.7)

51.5(50.8–52.3)

52.4(51.7–53.1)

0.001

Region (n %)

0.889

 East

40.6(28.6–52.7)

40.3(27.4–53.1)

41.0(29.6–52.5)

 Central

32.0(16.5–47.6)

32.3(16.0–48.6)

31.8(16.9–46.7)

 West

27.3(17.3–37.3)

27.4(17.6–37.3)

27.2(16.9–37.5)

Area (n %)

0.792

 Rural

65.8(46.3–85.3)

65.6(45.2–86.0)

66.0(47.3–84.8)

 Urban

34.2(14.7–53.7)

34.4(14.0–54.8)

34.0(15.2–52.7)

Education level (n %)

 < 0.001

 Middle school or below

81.4(75.3–86.2)

77.7(71.2–83.0)

85.1(79.3–89.6)

 High school or vocational school

14.0(10.6–18.3)

16.8(13.2–21.2)

11.2(7.9–15.5)

 College and above

4.6(3.0–7.1)

5.5(3.6–8.4)

3.7(2.3–5.9)

Smoking status (n %)

 < 0.001

 No

74.3(72.3–76.4)

51.7(47.7–55.7)

97.4(95.7–98.4)

 Yes

25.7(23.6–27.7)

48.3(44.3–52.3)

2.6(1.6–4.3)

Alcohol use (n %)

 < 0.001

 No

79.5(76.0–82.6)

62.1(56.0–68.3)

97.3(96.0–98.1)

 Yes

20.5(17.4–24.0)

37.9(31.7–44.0)

2.7(1.9–4.0)

 WC (cm)

83.65(82.04–85.26)

85.71(84.21–87.21)

81.55(79.79–83.31)

 < 0.001

 TG (mmol/L)

1.48(1.41–1.55)

1.56(1.49–1.64)

1.40(1.32–1.47)

 < 0.001

 HDL (mmol/L)

1.31(1.26–1.37)

1.27(1.21–1.32)

1.36(1.31–1.42)

 < 0.001

 FPG (mmol/L)

5.52(5.36–5.68)

5.58(5.43–5.73)

5.45(5.28–5.63)

0.008

 SBP (mmHg)

131.03(129.85–132.20)

131.70(130.64–132.75)

130.35(128.83–131.86)

0.025

 DBP (mmHg)

78.08(77.36–78.80)

80.16(79.28–81.04)

75.96(75.11–76.80)

 < 0.001

 BMI (kg/m2)

24.57(24.06–25.09)

24.57(24.11–25.04)

24.58(23.99–25.16)

0.971

Family history of CVD (n %)

 < 0.001

 No

87.2(82.6–90.8)

88.4(83.7–91.9)

86.0(81.4–89.6)

 Yes

12.8(9.2–17.4)

11.6(8.1–16.3)

14.0(10.4–18.6)