| Gender of workers | Hypertension | Total (n = 9285) | ||||
| Hypertensive (n = 2082) | Not hypertensive (n = 7203) | |||||
| effective | % | effective | % | effective | % | |
| Feminine | 687 | 33 | 2193 | 30 | 2880 | 31 |
| Male | 1395 | 67 | 5010 | 70 | 6405 | 69 |