Baseline Characteristics of Study Participants
| Risk Factor | Men (n=12,300) | Women (n=12,060) | PValue |
|---|---|---|---|
| BP = blood pressure; BMI = body mass index. | |||
| Age, mean (SD), y | 48.21 (10.36) | 47.86 (10.30) | .008 |
| Mongolian, % | 18.0 | 19.4 | .014 |
| High school education, % | 6.3 | 4.8 | <.001 |
| Income, % | .023 | ||
| Income 1, <¥1,000/y | 33.5 | 34.6 | |
| Income 2, ¥1,000 – ¥1,500/y | 12.8 | 13.5 | |
| Income 3, ¥1,500 – ¥2,000/y | 15.1 | 15.1 | |
| Income 4, >¥2,000/y | 38.6 | 36.9 | |
| Physical activity, % | <.001 | ||
| Low | 20.6 | 28 | |
| Moderate | 45.5 | 45.4 | |
| High | 33.9 | 26.6 | |
| Current smoker, % | 66.9 | 14.2 | <.001 |
| Current drinker, % | 56.0 | 4.8 | <.001 |
| Family history of hypertension, % | 11.0 | 8.1 | <.001 |
| Systolic BP, mean (SD), mm Hg | 122.90 (10.06) | 119.37 (11.35) | <.001 |
| Diastolic BP, mean (SD), mm Hg | 76.86 (7.24) | 75.26 (7.75) | <.001 |
| Prehypertension, % | 77.1 | 64.1 | <.001 |
| BMI, mean (SD), kg/m2 | 22.89 (2.66) | 23.12 (3.05) | <.001 |
| Salt intake, mean (SD), g/d | 15.61 (12.55) | 15.29 (12.16) | .043 |