| Marital status of workers | Hypertension | Total (n = 9285) | ||||
| Hypertensive (n = 2082) | Not hypertensive (n = 7203) | |||||
| effective | % | effective | % | effective | % | |
| Not married | 854 | 4 | 1553 | 22 | 2407 | 26 |
| Married | 1228 | 59 | 5650 | 78 | 6878 | 74 |