Table 1

 Demographics for cases of mortality from rectal cancer and non-cases in the United Autoworkers-General Motors autoworkers cohort

CasesNon-cases
*Distinct participants; 83 individuals appeared in >1 risk set.
†Computed at the end of follow-up.
Participants, n901707*
Race, n (%)
    African American9 (10)199 (11.7)
    White59 (56.6)1144 (67)
    Unknown22 (24.4)364 (22.3)
Males, n (%)86 (95.6)1576 (92.3)
Calendar year of death, mean (SD)1975 (13)
Year of birth, mean (SD)1910 (15.5)1913 (15.3)
Duration of follow-up, mean (SD), (years)32.9 (13.4)41.6 (12.6)
Plant, n (%)
    152 (57.8)853 (50)
    223 (25.5)570 (33.4)
    315 (16.7)284 (16.6)
Cumulative straight exposure (mg/m3-year)†
    Mean (SD)7.1 (17.7)4 (14.6)
    25th centile00
    50th centile0.50.004
    90th centile19.27.3
    99th centile108.673.8
    Maximum108.6188.2