Table 3 Results from proportional hazards regression models of lung cancer with time-dependent exposure metrics (BSM, B[ a ]P, time on ovens tops) including 10-year lag
From: Lung cancer mortality and exposure to polycyclic aromatic hydrocarbons in British coke oven workers
Variable | Units | Coefficient | Standard error | Exp(Coefft) = RR | 95% Confidence interval | |
|---|---|---|---|---|---|---|
NSF | ||||||
BSM exposure | mg.m-3.yr | 0.0038 | 0.0043 | 1.00 | 1.00 | 1.01 |
BSM 0 – 5 | mg.m-3.yr | −0.5484 | 0.3186 | 0.58 | 0.31 | 1.08 |
BSM 5 – 15 | 0.3159 | 0.2061 | 1.37 | 0.92 | 2.05 | |
BSM 15+ | 0.2017 | 0.1900 | 1.22 | 0.84 | 1.78 | |
B[a]P exposure | μg.m-3.yr | 0.0006 | 0.0016 | 1.00 | 1.00 | 1.00 |
B[a]P 0 – 10 | μg.m-3.yr | −0.3632 | 0.2777 | 0.70 | 0.40 | 1.20 |
B[a]P 10 – 30 | −0.0456 | 0.2376 | 0.96 | 0.60 | 1.52 | |
B[a]P 30+ | 0.4106 | 0.1809 | 1.51 | 1.06 | 2.15 | |
Time on tops | yr | 0.0113 | 0.0203 | 1.01 | 0.97 | 1.05 |
Time on tops 0 – 5 | yr | 0.3320 | 0.2161 | 1.39 | 0.91 | 2.13 |
Time on tops 5+ | 0.2924 | 0.2904 | 1.34 | 0.76 | 2.37 | |
BSC | ||||||
BSM exposure | mg.m-3.yr | −0.0158 | 0.0137 | 0.98 | 0.96 | 1.01 |
BSM 0 – 5 | mg.m-3.yr | −0.6041 | 0.4476 | 0.55 | 0.23 | 1.31 |
BSM 5 – 15 | −0.9863 | 0.5328 | 0.37 | 0.13 | 1.06 | |
BSM 15+ | −0.3353 | 0.2973 | 0.72 | 0.40 | 1.28 | |
B[a]P exposure | μg.m-3.yr | −0.0032 | 0.0062 | 1.00 | 0.98 | 1.01 |
B[a]P 0 – 10 | μg.m-3.yr | −0.6646 | 0.4195 | 0.51 | 0.23 | 1.17 |
B[a]P 10 – 30 | −0.5882 | 0.3537 | 0.56 | 0.28 | 1.11 | |
B[a]P 30+ | −0.3032 | 0.3565 | 0.74 | 0.37 | 1.49 | |
Time on tops | yr | 0.0470 | 0.0278 | 1.05 | 0.99 | 1.11 |
Time on tops 0 – 5 | yr | −0.0545 | 0.2642 | 0.95 | 0.56 | 1.59 |
Time on tops 5+ | 0.5939 | 0.2797 | 1.81 | 1.05 | 3.13 | |