Table 2 Clinical characteristics of study population

Systolic blood pressure (mmHg)

134.5 ± 20.4*

135.7 ± 21.0

135.1 ± 20.7

Diastolic blood pressure (mmHg)

80.9 ± 11.3*

79.9 ± 11.1

80.4 ± 11.2

Blood urea nitrogen (mmol/L)

6.1 ± 2.3*

5.7 ± 2.3

5.9 ± 2.3

Serum creatinine (μmol/L)

90.4 ± 26.9*

74.7 ± 23.2

82.0 ± 26.2

Blood cholesterol (mmol/L)

4.7 ± 1.1*

5.1 ± 1.1

4.9 ± 1.1

Serum triglyceride (mmol/L)

1.0 (0.7–1.5)

1.3 (0.9–1.8)

1.2 (0.8–1.7)

Fast blood glucose (mmol/L)

5.5 ± 1.4*

5.5 ± 1.5

5.5 ± 1.5

BMI

23.0 ± 3.3*

23.4 ± 3.6

23.2 ± 3.5

Abdominal circumference (cm)

83.5 ± 8.9*

81.7 ± 9.0

82.5 ± 9.0

Diabetes(n, %)

18,623 (11.5)*

24,923 (13.4)

43,546 (12.5)

Hypertension(n, %)

95,560 (58.9)*

114,831 (61.8)

210,391 (60.5)

Hyperlipidaemia(n, %)

27,361 (16.8)*

51,573 (27.6)

78,934 (22.6)

Obesity(n, %)

11,011 (6.7)*

18,734 (10.0)

29,745 (8.5)

Coronary heart disease(n, %)

11,154 (6.9)*

15,086 (8.1)

26,240 (7.5)

Stroke(n, %)

6377 (3.9)*

6135 (3.3)

12,512 (3.6)