Table 1 Baseline characteristics of participants by gender

Number (%)

7683

7667

15350

Age (years)

41.2 (40.9,41.5)

41.5 (41.2,41.8)

41.4 (41.1,41.7)

School years > 9 (%)

27.1

19.3*

23.2

  ≤ 1000

85.14

84.91

85.03

 1000–2000

12.20

13.35

12.76

  ≥ 2000

2.66

1.75

2.21

 Current smoking (yes, %)

50.7

2.6*

26.6

 Current drinking (yes, %)

67.6

11.3*

39.5

 Diagnosed hypertension (%)

11.75

11.48

11.62

 Body mass index (kg⁄m²)

24.4 (24.2,24.6)

24.5 (24.2,24.8)

24.5 (24.3,24.6)

 Waist circumference (cm)

85.3 (84.6,85.9)

81.3 (80.6,81.9)*

83.3 (82.8,83.8)

 Systolic blood pressure (mmHg)

124 (123,125)

118 (117,119)*

121 (120,122)

 Diastolicblood pressure (mmHg)

80 (79,81)

77 (76,78)*

79 (78,80)

 Fasting plasma glucose(mmol/L)

5.52 (5.45,5.59)

5.47 (5.40,5.53)

5.50 (5.45,5.55)

 Total cholesterol (mmol/L)

4.36 (4.31,4.41)

4.37 (4.31,4.43)

4.37 (4.31,4.42)