Table 1.
Baseline characteristics of study population (N = 3229)
| Women (n = 2113) | Men (n = 1116) | P Value | Total N = 3229 | |
|---|---|---|---|---|
| Age (years) | 54.56 ± 0.21 | 57.58 ± 0.32 | 0.014 | 55.60 ± 0.18 |
| Ethnicity, % | ||||
| Han | 52.3 | 55.6 | 53.5 | |
| Manchu | 46.0 | 43.1 | 45.0 | |
| Mongolian | 1.7 | 1.3 | 0.189 | 1.5 |
| Education level, % | ||||
| Primary school or below | 73.8 | 59.1 | 68.7 | |
| Middle school | 22.0 | 30.0 | 24.7 | |
| High school or above | 4.2 | 10.9 | <0.001 | 6.5 |
| Current smoking, % | 21.4 | 55.4 | <0.001 | 33.1 |
| Current drinking, % | 4.7 | 43.9 | <0.001 | 18.2 |
| BMI (kg/m2) | 23.39 ± 0.08 | 22.93 ± 0.10 | <0.001 | 23.23 ± 0.06 |
| Labor strength | ||||
| I | 21.8 | 17.3 | 20.2 | |
| II | 23.7 | 18.6 | 22.0 | |
| III | 44.1 | 43.4 | 43.8 | |
| IV | 10.4 | 20.7 | <0.001 | 14.0 |
| Dyslipidemia, % | 64.9 | 61.7 | 0.073 | 63.8 |
| Diabetes, % | 9.7 | 10.2 | 0.673 | 9.9 |
| Atrial fibrillation, % | 4.7 | 2.9 | 0.013 | 4.1 |
| SBP (mmHg) | 128.19 ± 0.47 | 132.76 ± 0.62 | 0.157 | 129.40 ± 0.37 |
| DBP (mmHg) | 80.89 ± 0.25 | 84.48 ± 0.36 | 0.044 | 82.15 ± 0.22 |
| BP levela | ||||
| Normal | 31.2 | 18.8 | 26.9 | |
| Elevated | 9.0 | 8.3 | 8.8 | |
| Stage 1 | 28.2 | 31.0 | 29.2 | |
| Stage 2 | 31.6 | 41.8 | <0.001 | 35.2 |
| History of CHD, % | 11.5 | 7.7 | 0.001 | 10.2 |
| Antihypertensive medications, % | 3.7 | 2.9 | 0.916 | 3.4 |
Abbreviations: BMI body mass index, TC total cholesterol, TG triglyceride; LDL-C low density lipoprotein cholesterol; HDL-C high-density lipoprotein cholesterol; CHD Coronary heart disease, SBP systolic blood pressure, DBP diastolic blood pressure. P for category from chi-square; for continuous from student’ t test. a BP level was defined by 2017ACC/AHA hypertension guideline