Characteristics of the study populations
| Occupational group | Number | Age* | Smokers† | VWF |
|---|---|---|---|---|
| Results expressed as number, median (interquartile range), or percentage. | ||||
| Kruskal-Wallis one way analysis of variance: *p<0.001. | ||||
| χ2 test: †p<0.001. | ||||
| Stone grinders | 188 | 39 (28–48) | 83 (44.2%) | 26 (13.8%) |
| Stone carvers | 237 | 41 (26–51) | 100 (44.2%) | 87 (36.7%) |
| Quarry drillers | 145 | 43 (28–51) | 57 (39.3%) | 59 (40.7%) |
| Dockyard painters | 394 | 33 (25–46) | 237 (60.2%) | 65 (16.5%) |
| Dockyard boilermakers | 179 | 42 (31–49) | 115 (64.3%) | 37 (20.7%) |
| Dockyard caulkers | 94 | 31 (25–49) | 61 (64.9%) | 51 (54.3%) |
| Forestry workers | 320 | 45 (34–55) | 178 (55.6%) | 107 (33.4%) |