Table 6

Lung cancer by duration of exposure to unsintered hard metal dust,1 exposure to sintered hard metal dust2 and IARC carcinogens according to the job exposure matrix among males

Unsintered Sintered Observed Expected SMR 95% CI
Not exposed to any IARC carcinogen:
 Non-exposedNon-exposed76.131.140.46 to  2.35
 <10 yNon-exposed20.972.060.25 to  7.45
 10–19 yNon-exposed20.533.770.46 to 13.63
 ⩾20 yNon-exposed10.254.000.10 to 22.29
 Total exposedNon-exposed51.752.860.92 to  6.67
 Non-exposedExposed32.641.140.23 to  3.32
 <10 yExposed11.830.550.01 to  3.04
 10–19 yExposed21.191.680.20 to  6.07
 ⩾20 yExposed20.872.300.28 to  8.30
 Total exposedExposed53.891.290.41 to  3.00
Exposed to any IARC carcinogen:
 Non-exposedNon-exposed138.101.600.85 to  2.74
 <10 yNon-exposed21.002.000.24 to  7.22
 10–19 yNon-exposed20.1910.531.27 to 38.02
 ⩾20 yNon-exposed00.060.000.00 to  61.13
 Total exposedNon-exposed41.253.200.87 to  8.19
 Non-exposedExposed10.462.170.05 to 12.11
 <10 yExposed41.582.530.69 to  6.48
 10–19 yExposed30.953.160.65 to  9.23
 ⩾20 yExposed10.372.700.07 to 15.06
 Total exposedExposed82.902.761.19 to  5.44
Poisson regression RR 95 % CI
Ever smoker vnon-smoker1.580.69 to  3.63
Unknownv non-smoker0.860.32 to  2.25
Exposure to any IARC carcinogen6-152 (yesv no)1.480.81 to  2.68
Exposure to sintered hard metal dust (yesv no)0.750.37 to  1.53
By recoded duration of exposure to unsintered hard metal dust6-153 1.431.03 to  1.98
  • 6-150 Consisting of simultaneous exposure to cobalt and tungsten carbide before sintering.

  • 6-151 Consisting of simultaneous exposure to cobalt and tungsten carbide after sintering.

  • 6-152 Asbestos, PAH, silica, nickel, chromium compounds.

  • 6-153 Non-exposed=1; <10 y=2; 10–20 y=3; >20 y=4.