Table 5

Comparison of relative risk estimates of current and earlier studies on cancer incidence among firefighters

Cancer siteCurrent study
SIR (95% CI)
Daniels et al12
SIR (95% CI)
LeMasters et al5
mRR (95% CI)
IARC1
SIR (95% CI)
All sites1.06 (1.02 to 1.11)1.09 (1.06 to 1.12)1.05 (1.00 to 1.09)
Buccal cavity and pharynx0.92 (0.62 to 1.31)*1.32 (1.08 to 1.58)*1.23 (0.96 to 1.55)
Stomach1.10 (0.91 to 1.30)1.15 (0.93 to 1.40)1.22 (1.04 to 1.44)
Colon1.14 (0.99 to 1.31)1.21 (1.09 to 1.34) 1.21 (1.03 to 1.41)
Rectum0.99 (0.82 to 1.19)1.11 (0.94 to 1.30) 1.29 (1.10 to 1.51)
Skin melanoma1.25 (1.03 to 1.51)0.87 (0.73 to 1.03)1.32 (1.10 to 1.57)
Non-melanoma skin1.33 (1.10 to 1.59)1.39 (1.10 to 1.73)
Mesothelioma1.55 (0.90 to 2.48)2.29 (1.60 to 3.19)
Prostate1.13 (1.05 to 1.22)1.03 (0.98 to 1.09)1.28 (1.15 to 1.43)1.30 (1.12 to 1.51)
Testicular0.51 (0.23 to 0.98)0.74 (0.41 to 1.22) 2.02 (1.30 to 3.13)1.47 (1.20 to 1.80)
Brain0.86 (0.66 to 1.10)1.02 (0.76 to 1.34) 1.32 (1.12 to 1.54)
Non-Hodgkin lymphoma1.04 (0.83 to 1.29)0.99 (0.84 to 1.15) 1.51 (1.31 to 1.73)1.21 (1.08 to 1.36)
Multiple myeloma1.13 (0.81 to 1.53)0.72 (0.50 to 0.99)1.53 (1.21 to 1.94)
Leukaemia0.91 (0.71 to 1.22)0.94 (0.77 to 1.15)1.14 (0.98 to 1.31)
  • *Combined SIR for buccal cavity and pharynx.

  • IARC, International Agency for Research on Cancer; mRR: meta risk ratio (summary risk estimate across all types of incidence and mortality studies5).