December 17, 1984


FILE INFORMATION FOR NICKEL DATA FILES


     There are two data files: NICKEL4 and NICKEL6.

     NICKEL4 contains data for all of the 4x4x5x5 cells indexed by
age first employed, year first employed, exposure category, and
time since first employed.

     NICKEL6 contains data for all 4x4x5x5x15x9 person year cells
having non-zero person years (the additional two indices are age
and calendar date).

     NICKEL4 has the following format:

          4(X,I2),6X,4(X,I3),4(X,F12.6);   242 records.

     NICKEL6 has the following format:

          6(X,I2),4(X,I3),4(X,F12.6);   1523 records.

     The variables are:

          NICKEL4                       NICKEL6
          -------                       -------

          AFE                           AFE
          YFE                           YFE
          EXP                           EXP
          TFE                           TFE
          TOTAL PERSONS                 AGE
          LUNG CA. DEATHS               DATE
          NASAL CA. DEATHS              TOTAL PERSONS
          TOTAL DEATHS                  LUNG CA. DEATHS
          PERSON YEARS                  NASAL CA. DEATHS
          EXP. LUNG CA. DEATHS          TOTAL DEATHS
          EXP. NASAL CA. DEATHS         PERSON YEARS
          EXP. TOTAL DEATHS             EXP. LUNG CA. DEATHS
                                        EXP. NASAL CA. DEATHS
                                        EXP. TOTAL DEATHS

where
          AFE = age first employed
          YFE = year first employed
          EXP = exposure category
          TFE = time since first employed.


Note - all expected deaths are multiplied by 1000.
(FILE INFORMATION FOR NICKEL DATA FILES) - page 2


     The categories are:

          AFE:    1 = < 20.0
                  2 = 20.0-27.5
                  3 = 27.5-35.0
                  4 = 35.0-85.0

          YFE:    1 = < 1910.0
                  2 = 1910.0-1914.999
                  3 = 1915.0-1919.999
                  4 = 1920.0-1924.999

          EXP:    1 = 0.0
                  2 = 0.5-4.0
                  3 = 4.5-8.0
                  4 = 8.5-12.0
                  5 = 12.5 +

          TFE:    1 = 0.0-19.999
                  2 = 20.0-29.999
                  3 = 30.0-39.999
                  4 = 40.0-49.999
                  5 = 50.0 +

          AGE:    1 = 10.0-14.999
                  2 = 15.0-19.999

                     ...

                 14 = 80.0-84.999
                 15 = 85.0 +

          DATE:   1 = April 1, 1934 - 1939.999
                  2 = 1940.0-1944.999

                     ...

                  8 = 1970.0-1974.999
                  9 = 1975.0-1981.999