Odds ratios for risk of 2/1+ within age group 50–74, showing the individual effect of a number of cumulative exposure indices, plus the effect of confounders individually after adjusting for cumulative post-1964 quartz exposure
| Predictor variable | Estimated odds ratio | 95% CI |
|---|---|---|
| *Relative to non-smokers. | ||
| Dust (g.h.m−3) | ||
| All periods | 1.030 | (1.018 to 1.043) |
| Pre-1964 | 0.995 | (0.977 to 1.014) |
| Post-1964 | 1.101 | (1.068 to 1.135) |
| Quartz (g.h.m−3) | ||
| All periods | 1.702 | (1.456 to 1.990) |
| Pre-1964 | 0.884 | (0.633 to 1.236) |
| Post-1964 | 1.811 | (1.536 to 2.136) |
| After quartz (post-1964) | ||
| Quartz pre-1964 | 0.854 | (0.534 to 1.365) |
| Dust pre-1964 | 0.996 | (0.971 to 1.022) |
| Dust post-1964 | 1.025 | (0.974 to 1.079) |
| Age | 0.990 | (0.925 to 1.059) |
| Ex-smoker* | 0.453 | (0.140 to 1.467) |
| Smoker* | 0.556 | (0.176 to 1.757) |
| Pre-1954 h×10−3 | 0.987 | (0.944 to 1.032) |