Job titles of members of the Guangxi manganese-exposed workers healthy cohort (GXMEWHC)
| Job title | Number (n) | Per cent | Age (years),mean±SD | Seniority (years),mean±SD |
|---|---|---|---|---|
| Smelter | 594 | 31.5 | 38.95±8.20 | 15.82±9.02 |
| Human crushing worker | 320 | 16.9 | 41.08±5.30 | 9.04±6.00 |
| Craneman | 74 | 3.9 | 37.15±8.76 | 16.24±8.88 |
| Finishing machining worker | 99 | 5.2 | 40.36±6.10 | 10.20±8.79 |
| Scaleman | 105 | 5.6 | 42.30±4.92 | 17.53±6.88 |
| Sampleman | 21 | 1.1 | 45.75±7.02 | 23.07±6.57 |
| Welder | 128 | 6.8 | 40.75±10.13 | 18.29±10.76 |
| Chemical analyst | 54 | 2.9 | 45.52±7.02 | 24.29±8.37 |
| Repairman | 151 | 8.0 | 41.63±9.10 | 19.19±10.64 |
| Electrician | 91 | 4.8 | 40.28±7.31 | 19.45±8.00 |
| Alkali recovery worker | 133 | 7.0 | 40.89±6.33 | 13.74±8.74 |
| Car driver | 118 | 6.3 | 39.01±9.96 | 15.09±12.07 |
| Total | 1888 | 100 | 40.31±7.85 | 15.23±9.60 |