Document Ed2DnkO0kd73DMM9EQ3Nv04Mb

17. tnilyaod.^. They will be discussed separately from those Included In the population and tlme-lstorval under etudy. A comparison of lung cancer mortality In tho asbestos-producing counties haa been made with that In counties which are far romoved irom th aabeatoa mines and In which, presumably, no asbestos minors live. Finally, In order to broadon the comparison ol death rates In dif ferent population groupa, the rates have been collected lor Canada generally, tad lor the United States, according to the most recent published and unpub* Uthed material, i " Rosults and Interpretation The cohort which was constructed according to the criteria described In the preceding section haa been considered Individually and compared with Ihe genoral population. Description ol the cohort will be presented here as' t pretace to the results ol Ihe study, ,, Original Cohort Lest Persons Dsducted Final Cohort Living In 1955 (working and retired) Dead by 1955 Cancor ollung Questionable cancor ol lung Other cauoss Unknown couooa Smokers Nonsmokers Unknown 6091 133 5958 5771 lb7 9 3 J09 6 4673 1265 20 0267