Grouped occupational exposures and amyotrophic lateral sclerosis risk
| Cases | Controls | ||
|---|---|---|---|
| (N=2647) No. | (N=13 378) No. | Adjusted* OR (95% CI) | |
| No exposure | 1787 | 9104 | Reference |
| Metals+benzo (a) pyrene† | 651 | 3243 | 1.07 (0.91 to 1.26) |
| Solvents‡ | 489 | 2496 | 0.92 (0.77 to 1.09) |
| Formaldehyde | 323 | 1579 | 1.07 (0.93 to 1.23) |
*Adjusted for age and gender (matching factors) and education. The three occupational exposure groups were mutually adjusted for one another.
†Includes lead, iron, nickel, chromium, benzo (a) pyrene.
‡Includes toluene, benzene, trichloroethylene, methylene chloride, perchloroethylene, 1,1,1-trichloroethane.