Table 1 Demographics of study population.

Never-smoker

Ex-smoker

Current smoker

N

14,345,458

3,042,684

5,603,499

P value

Mean age (years)

48.86 ± 14.8

50.11 ± 13.35

43.34 ± 12.87

<0.001

Age group

  20–39

3,684,294(25.68)

672,772(22.11)

2,321,427(41.43)

  40–64

8,309,359(57.92)

1,903,257(62.55)

2,898,057(51.72)

  ≥65

2,351,805(16.39)

466,655(15.34)

384,015(6.85)

Male (%)

3,615,580(25.2)

2,830,044(93.01)

5,149,573(91.9)

<0.0001

Urban habitat (%)

6,587,708(45.95)

1,443,414(47.46)

2,498,188(44.61)

<0.0001

Drinking status (2–3 times a month)

270,927(1.89)

355,742(11.69)

885,652(15.81)

<0.0001

Regular exercise (more than 3 times per a week, %)

6,565,007(45.76)

1,890,240(62.12)

2,936,635(52.41)

<0.0001

BMI (kg/cm²)

23.46 ± 3.31

24.36 ± 2.96

23.91 ± 3.28

<0.0001

  <18.5

677,515(4.72)

58,319(1.92)

194,862(3.48)

  <23

6,128,109(42.72)

924,509(30.38)

2,093,363(37.36)

  <25

3,332,620(23.23)

85,0225(27.94)

1,375,213(24.54)

  <30

3,697,465(25.77)

1,100,683(36.17)

1,705,002(30.43)

  ≥30

509,749(3.55)

108,948(3.58)

235,059(4.19)

Height (cm)

159.75 ± 8.41

168.74 ± 6.81

169.68 ± 7.24

<0.0001

Weight (kg)

60 ± 10.52

69.52 ± 10.43

69.06 ± 11.59

<0.0001

Waist circumference (cm)

78.14 ± 9.27

84.16 ± 8.07

82.59 ± 8.49

<0.0001

Diabetes

1,217,006(8.48)

377,630(12.41)

525,950(9.39)

<0.0001

Glucose (mmol/L)

96.35 ± 21.85

101.02 ± 25.14

98.63 ± 25.78

<0.0001

Hypertension

3,757,617(26.19)

1,022,615(33.61)

1,271,606(22.69)

<0.0001

Diastolic blood pressure(mmHg)

75.14 ± 10.12

78.12 ± 9.93

77.31 ± 9.85

<0.0001

Systolic blood pressure(mmHg)

121.15 ± 15.59

125.22 ± 14.54

123.36 ± 14.19

<0.0001

Dyslipidemia

2,836,746(19.77)

664,482(21.84)

932,288(16.64)

<0.0001

Cholesterol(mmol/L)

194.7 ± 36.97

195.53 ± 36.56

194.26 ± 36.81

<0.0001

Previous stroke (%)

130,454(1.43)

52,808(2.57)

28,561(0.8)

<0.0001

Previous myocardial infarction (%)

294,495(3.21)

103,386(5.03)

62,761(1.76)

<0.0001