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 |