| Categories of workers | Hypertension | Total (n = 9285) | ||||
| Hypertensive (n = 2082) | Not hypertensive (n = 7203) | |||||
| effective | % | effective | % | effective | % | |
| Frames | 729 | 35 | 1800 | 25 | 2529 | 27 |
| Officers | 1353 | 65 | 5403 | 75 | 6756 | 73 |