Demographics of a US aluminium manufacturing workers cohort, by sex, 2001–2010
| Male | Female | All | p Value | ||||
|---|---|---|---|---|---|---|---|
| N | % | N | % | N | % | ||
| Employees | 18 893 | 78.87 | 5063 | 21.13 | 23 956 | 100.00 | – |
| Person-years | 85 102 | 79.68 | 21 697 | 20.32 | 106 799 | 100.00 | – |
| Age, mean (SD) | 44.18 (12.71) | 44.39 (11.87) | 44.22 (12.53) | 0.30 | |||
| No. of jobs held, mean (SD) | 1.55 (0.94) | 1.53 (0.89) | 1.55 (0.93) | 0.20 | |||
| Ethnicity | <0.001 | ||||||
| Black | 2298 | 12.16 | 984 | 19.44 | 3282 | 13.70 | – |
| Hispanic/Latino | 1146 | 6.07 | 445 | 8.79 | 1591 | 6.64 | – |
| White | 15 138 | 80.12 | 3525 | 69.62 | 18 663 | 77.91 | – |
| Other | 311 | 1.65 | 109 | 2.15 | 420 | 1.75 | |
| Plant type | – | – | – | – | – | – | <0.0001 |
| Smelter | 8665 | 45.86 | 678 | 13.39 | 9343 | 39.00 | – |
| Fabrication | 10 228 | 54.14 | 4385 | 86.61 | 14 613 | 61.00 | – |