Table 1

Characteristics of the case-by-case expert assessment, Asbestos JEM, DOMJEM and FINJEM

Case-by-case expert assessmentAsbestos JEMDOMJEMFINJEM
Occupational axisCBS-NLCS (1036 job codes present in the subcohort)CBS-84 (123 job codes)ISCO-68 (1842 job codes)The Combined Occupational Classification of Finnish Censuses in 1970–1985 (311 job codes)
Exposure axis; included agents
  • Asbestos

  • PAHs

  • Welding fumes

Asbestos
  • Asbestos

  • PAHs

  • Asbestos

  • Benzo-a-pyrene (ie, proxy for PAHs)

  • Welding fumes

Time axisExposure is assigned for the length of an occupation, taking into consideration the time periods encompassed
  • 1945–1949

  • 1950–1954

  • 1955–1959

  • 1960–1964

  • 1965–1969

  • 1970–1974

  • 1975–1979

  • 1980–1984

  • 1985–1989

No time scale present, exposure is an estimation of the average exposure over time
  • 1945–1959

  • 1960–1974

  • 1975–1984

  • 1985–1994

Matrix cells; measures of exposure
  • P* (%):

  • 0=0

  • 1<30

  • 2=30–90

  • 3>90

  • P* (%):

  • 0=0

  • 1=5–20

  • 2=20–80

  • 3>80

  • I (fibres/cm3):

  • 0=0

  • 1=0–0.5

  • 2=0.5–1

  • 3=1–2

  • 4=2–5

  • 5=5–10

  • 6=10–20

  • P×I

  • General cut-off points are not defined for the DOMJEM.

  • P×I:

  • 0= no exposure

  • 1= low exposure

  • (low P×high I /

  • high P×low I)

  • 2= high exposure (high P×high I)

  • P* (%):

  • 0–100

  • I:

  • Continuous scale, exposure-specific units

  • P×I:

  • Continuous scale,

  • exposure-specific units

  • * P refers to prevalence of exposure, that is, agent-specific prevalence of exposure in an occupation.

  • I refers to the mean intensity of exposure among the exposed.

  • JEM, job-exposure matrice.