Odds of silica-type PMF versus non-silica-type (ie, mixed-type or coal-type) PMF
| Crude | Adjusted* | |||||
| OR | 95% CI | OR | 95% CI | |||
| Year of birth† | 1.18 | 1.04 | 1.34 | 1.22 | 1.02 | 1.45 |
| Age at death | 0.98 | 0.95 | 1.02 | 1.02 | 0.98 | 1.07 |
| Years of underground coal mining | 0.97 | 0.95 | 1.00 | 0.98 | 0.95 | 1.01 |
| Region worked | ||||||
| Central Appalachia‡ | 1.11 | 0.62 | 2.02 | 0.98 | 0.52 | 1.86 |
| Rest of USA | Ref | Ref | ||||
*Adjusted ORs and CIs are derived from a multivariate logistic regression model that includes all covariates listed in the table.
†Every 5 years after 1885.
‡Central Appalachia includes Kentucky, Virginia and West Virginia.
PMF, progressive massive fibrosis.