Table 3

HRs at 4600 fire-runs for temporal factors*

Temporal factorMN lung base model HR=1.07 (0.97 to 1.19)Leukaemia base model HR=1.08 (0.78 to 1.44)
Exposure windowHR (95%CI)Exposure windowHR (95%CI)
TSE10 to 20 years1.06 (0.80 to 1.37)5 to 15 years1.51 (0.65 to 3.21)
20 to 30 years1.08 (0.86 to 1.34)15 to 25 years1.52 (0.71 to 2.93)
>30 years1.08 (0.88 to 1.32)>25 years0.70 (0.38 to 1.19)
LRT p value†0.987LRT p value†0.123
AE<40 years0.97 (0.81 to 1.16)<40 years0.95 (0.52 to 1.62)
40+ years1.17 (0.99 to 1.37)40+ years1.19 (0.73 to 1.85)
LRT p value†0.194LRT p value†0.598
EP<19701.06 (0.86 to 1.29)<19700.95 (0.48 to 1.72)
1970+1.08 (0.94 to 1.24)1970+1.14 (0.76 to 1.66)
LRT p value†0.922LRT p value†0.652
  • *All temporal models are piecewise loglinear adjusted for race, fire department and birth cohort.

  • †p Value of LRT comparing the base model to the model with two or more exposure windows.

  • AE, age at exposure; EP, exposure period; LRT, likelihood ratio test; MN, malignant neoplasm; TSE, time since exposure.