Crude and adjusted hazards ratios (HRs) (95% CIs) for predictors of brain cancers (n=36)
| Variable | n | Person-years | Deaths | Mortality / 100000 | Crude | Adjusted5-150 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| HR (95% CI) | p Value5-151 | HR (95% CI) | p Value5-151 | ||||||||||||
| Age at first exposure (y): | 0.03 | 0.02 | |||||||||||||
| <25 | 3619 | 118081 | 11 | 9.32 | Reference | Reference | |||||||||
| 25–34 | 4173 | 136243 | 12 | 8.81 | 1.0 (0.4 to 2.2) | 0.9 (0.4 to 2.0) | |||||||||
| ⩾35 | 2317 | 62221 | 13 | 20.89 | 2.6 (1.2 to 6.0) | 2.6 (1.2 to 5.9) | |||||||||
| Duration of exposure (y): | 0.11 | 0.09 | |||||||||||||
| <5 | 4774 | 136200 | 11 | 8.08 | Reference | Reference | |||||||||
| 5–9 | 2383 | 71806 | 11 | 15.32 | 2.0 (0.9 to 4.6) | 2.0 (0.9 to 4.7) | |||||||||
| 10–19 | 1992 | 69015 | 5 | 7.24 | 0.8 (0.3 to 2.3) | 0.7 (0.2 to 2.0) | |||||||||
| ⩾20 | 960 | 39524 | 9 | 22.77 | 2.2 (0.9 to 5.5) | 1.9 (0.8 to 5.0) | |||||||||
| Year of first exposure: | 0.59 | 0.53 | |||||||||||||
| <1950 | 2425 | 92645 | 15 | 16.19 | Reference | Reference | |||||||||
| 1950–59 | 2806 | 98729 | 12 | 12.15 | 0.8 (0.4 to 1.8) | 1.0 (0.5 to 2.3) | |||||||||
| 1960–72 | 4878 | 125171 | 9 | 7.19 | 0.6 (0.3 to 1.6) | 0.6 (0.2 to 1.6) | |||||||||