| Weight of workers | Hypertension | Total (n = 9285) | ||||
| Hypertensive (n = 2082) | Not hypertensive (n = 7203) | |||||
| effective | % | effective | % | effective | % | |
| >70 | 1207 | 58 | 3198 | 44 | 4405 | 47 |
| ≤70 | 875 | 42 | 4005 | 56 | 4880 | 53 |