Demographic characteristics of welders and non-welders
| Characteristic | Welders (n = 1353) | Non-welders (n = 822) | Total (n = 2175) | |||
|---|---|---|---|---|---|---|
| n | (%) | n | (%) | n | (%) | |
| *Age was missing for 32 workers. | ||||||
| †775 (35.6%) of the claims were not assigned Standard Industrial Classification (SIC) codes. | ||||||
| Sex | ||||||
| Male | 1314 | (97.1) | 798 | (97.1) | 2112 | (97.1) |
| Female | 39 | (2.9) | 24 | (2.9) | 63 | (2.9) |
| Age* (years) | ||||||
| 15–20 | 30 | (2.2) | 32 | (4.0) | 62 | (2.9) |
| 20–24 | 199 | (14.9) | 103 | (12.8) | 302 | (14.1) |
| 25–34 | 480 | (35.9) | 236 | (29.3) | 716 | (33.4) |
| 35–44 | 371 | (27.8) | 261 | (32.4) | 632 | (29.5) |
| 45–54 | 201 | (15.0) | 129 | (16.0) | 330 | (15.4) |
| 55–64 | 54 | (4.0) | 40 | (5.0) | 94 | (4.4) |
| 65+ | 3 | (0.2) | 4 | (0.5) | 7 | (0.3) |
| Mean (SEM) | 39 | (0.28) | 36.0 | (0.38) | 35.3 | (0.23) |
| SIC category† | ||||||
| Manufacturing | 573 | (70.4) | 277 | (47.3) | 850 | (60.7) |
| Construction | 68 | (8.4) | 124 | (21.2) | 192 | (13.7) |
| Services | 96 | (11.8) | 73 | (12.5) | 169 | (12.1) |
| Wholesale and retail trade | 40 | (4.9) | 43 | (7.3) | 83 | (5.9) |
| Transportation, communications, electric, gas, sanitation services | 19 | (2.3) | 40 | (6.8) | 59 | (4.2) |
| Finance, insurance, real estate, public administration | 13 | (1.6) | 14 | (2.4) | 27 | (1.9) |
| Agriculture, forestry, fishing, mining | 5 | (0.6) | 7 | (1.2) | 12 | (0.9) |
| Non-classifiable estimate | 0 | (0.0) | 8 | (1.4) | 8 | (0.6) |