Document mqgk7K8K7Bm8V6kxRV5dRg5og

Table 2 combines the three industries and compares deaths in three time periods. Of interest here is the fact that the "asbestos lung cancer" deaths did not start showing up in the cohorts in the study until the latter part of the follow-up period, whereas asbestosis deaths oc curred more uniformly throughout the period. This is probably a reflec tion of a longer latent period for lung cancer, although from this table one cannot determine whether it might not also be a reflection of a longer duration of exposure and thus a greater total exposure.. Table 2 also suggests that were a longer follow-up period possible, more lung cancer might have been observed, relative to asbestosis, so that the death rates shown in Table 1 for "asbestos lung cancer" may be understated relative to the death rates for asbestosis. Doubling the numbers of lung cancer deaths in Table 1, for example, would make the gradients for lung cancer closer to those for asbestosis. Table 2 U. S. ASBESTOS PRODUCTS WORKERS EMPLOYED AT SOME TIME DURING 1948-1951 SHOWING PERSON YEARS LIVED AND DEATHS AT AGES 15-64 DURING THREE TIME PERIODS PERSON YEARS "ASBESTOS LUNG CANCER" NO. OF DEATHS RATE PER 100, 000 ASBESTOSIS NO. OF DEATHS RATE PER 100, 000 19481952 87,792 19531957 102,441 19581963 104,985 0 12 20 0.0 11.7 19. 1 13 14.8 21 20. 5 24 22. 9 Additional Data In addition to the cohort of 21, 755 men upon which Tables 1 and 2 are based, some data are now available on a cohort of 1,151 white males who were working in three asbestos textile plants during the period 1938-41, or some ten years earlier than the cohort previously reported on. This provides an additional period of follow-up for workers in an environment where asbestos dust exposures were probably fairly heavy. 01 133 4404 54.