Table 1.
Characteristics of study participants according to five categories of resting heart ratea
| Resting heart rate categories, beats/min |
||||||
|---|---|---|---|---|---|---|
| Characteristic | ≤68 (n = 12 613) | 69–72 (n = 13 060) | 73–76 (n = 8110) | 77–80 (n = 8620) | >80 (n = 5168) | P for trend |
| Age (years), mean | 54.0 | 53.1 | 53.3 | 53.4 | 54.1 | 0.41 |
| Education level | <0.0001 | |||||
| Elementary school or less | 18.7 | 16.1 | 16.8 | 17.8 | 20.5 | |
| Middle school | 39.0 | 41.4 | 41.6 | 41.5 | 39.1 | |
| High school | 29.1 | 29.6 | 28.9 | 28.9 | 28.7 | |
| College or more | 13.2 | 12.9 | 12.7 | 11.7 | 11.7 | |
| Occupation | 0.0004 | |||||
| Manufacturing and agricultural workers | 50.6 | 50.9 | 51.1 | 52.3 | 52.4 | |
| Clerical and service workers | 20.8 | 21.5 | 21.0 | 21.0 | 21.2 | |
| Professionals, technicians, administrators | 28.7 | 27.6 | 27.8 | 26.7 | 26.4 | |
| Annual family income (yuan) | <0.0001 | |||||
| <10 000 | 15.7 | 15.1 | 14.9 | 15.8 | 17.4 | |
| 10 000–19 999 | 37.8 | 37.9 | 39.6 | 40.1 | 39.3 | |
| 20 000–29 999 | 28.3 | 29.6 | 28.6 | 27.9 | 26.7 | |
| ≥30 000 | 18.2 | 17.3 | 16.9 | 16.1 | 16.6 | |
| Ever smoked cigarettes | 2.2 | 2.4 | 2.7 | 2.6 | 3.3 | 0.0001 |
| Ever drank alcohol | 2.3 | 2.4 | 2.4 | 2.5 | 2.4 | 0.44 |
| BMI (kg/m2), mean | 23.5 | 23.5 | 23.6 | 23.7 | 23.9 | <0.0001 |
| WHR, mean | 0.80 | 0.80 | 0.81 | 0.81 | 0.81 | <0.0001 |
| Physical activity (MET-h/day), mean | 15.4 | 15.5 | 15.5 | 15.4 | 15.3 | 0.26 |
| Systolic BP (mmHg), mean | 118.7 | 118.4 | 118.8 | 119.7 | 121.9 | <0.0001 |
| Diastolic BP (mmHg), mean | 75.8 | 76.0 | 76.5 | 77.0 | 78.1 | <0.0001 |
aUnless otherwise indicated, data are given as percentage of subjects.