Table 1 Baseline characteristics of the participants by MetS status

Age(years,mean ± SD)

51.76 ± 12.56

50.46 ± 12.86

54.52 ± 11.41

 < 0.001

Gender, n(%)

 Female

19,630(20.04)

13,982(20.99)

5648(18.01)

 < 0.001

 Male

78,345(79.96)

52,634(79.01)

25,711(81.99)

Smoking status, n(%)

 Never

58,457(59.67)

40,268(60.45)

18,189(58.00)

 < 0.001

 Former

5772(5.89)

3398(5.10)

2374(7.57)

 Current

33,746(34.44)

22,950(34.45)

10,796(34.43)

Alcohol consumption, n(%)

 Never

57,542(58.73)

39,384(59.12)

18,158(57.90)

 < 0.001

 Former

3906(3.99)

2309(3.47)

1597(5.09)

 Current

36,527(37.28)

24,923(37.41)

11,604(37.01)

Occupation, n(%)

 White collar

7919(8.08)

5284(7.93)

2635(8.40)

0.012

 Blue collar

90,056(91.92)

61,332(92.07)

28,724(91.60)

Education level, n(%)

 Illiteracy and primary

11,134(11.36)

6782(10.18)

4352(13.88)

 < 0.001

 Middle school

79,964(81.62)

54,599(81.96)

25,365(80.89)

 College and above

6877(7.02)

5235(7.86)

1642(5.23)

Income(yuan per psrson per month), n(%)

  < 600

28,419(29.01)

18,886(28.35)

9533(30.40)

 < 0.001

  ≥ 600- < 1000

62,982(64.28)

43,237(64.90)

19,745(62.96)

  ≥ 1000

6574(6.71)

4493(6.75)

2081(6.64)

Marital status, n(%)

 Single

4503(4.60)

3238(4.86)

1265(4.03)

 < 0.001

 Married/cohabiting

93,472(95.40)

63,378(95.14)

30,094(95.97)

Salt intake, n(%)

 Light

9149(9.34)

6203(9.31)

2946(9.39)

 < 0.001

 General

78,257(79.87)

53,714(80.63)

24,543(78.26)

 Heavy

10,569(10.79)

6699(10.06)

3870(12.35)

Physical activities, n(%)

 Never

8666(8.85)

5901(8.86)

2765(8.82)

 < 0.001

 Occasionally

73,797(75.32)

51,011(76.57)

22,786(72.66)

 Frequently

15,512(15.83)

9704(14.57)

5808(18.52)