Document ppmB2kYNboNzpZDJbjmg6OzZj

.1. u. ./. , iKt turns tu; txix sriu. ti. iihai.tii i.i '.v<; ( As\ r.c TaM-K 21.--Xumber af Jl.-aIks ami IKvIh Kates f<r HVfkJtf by ./</< tirallfr far the Ailiill Mole J'ufulatiun af Ike United State} * way, ami other countries, at least 50.UJO livracms must be exposed throughout the T.tm.i An Oroap 9>-4( 4M4 (HI W+ Teul tapubUm igtajiu ycajw HjtttMn .world, and it can be assumed that this Votrt KftlO (rr UD.Ul) number lias been fairly constant in the 20 a. anji years since 10-15 when the first case of IIU asbestusis with, lung cancer was reported. JT.3 At least l,OUO,OUQ man-years of exposure (VttMicf jtli-raitlu- r>uh| r Kitfht ('mint*.. FfW lihT QiM*c f|t"tVh(tRl^Ctft*f4iil("JpUurlrriclr|srM has thus been accumulated, and this figure Mvnirrjtrl lib *W h-^- Data Front -Vital BtattMlct at llo CoUttl ."tain," Vt 1 IoadXtsn. can be divided by the approximately 150 * (| bawin^l :ttn . cases of lung cancer with asbestosis re asbestos miners in this study. It is there ported during the 20-vcnr period. This fore obvious that there arc no iiufiortaut gives a rale of 15 jwr 100,000, which is at- immediately sur differences between tlte rales for asbestos least indicative that any lung caucer rale duciug areas is j miners and those for the general iKjpulatiou which can bo calculated for workers ex of eight couniii of Quclwc ami the Dominion of t'aiiada. cised to xslieslus dust is not much greater While Mrgantic Since it is prulKihlc tluit figures for tlte titan lliat for the unexposed population. twice tluit tjf tl- United States arc more complete and, there fore, possibly more comparable to the data for the miners, age- specific rates were com puted from "Vital Statistics of the United States," Volumes I ami II. for 1952. These rates have been tabulated in Table 21. It is apparent that these rates compare favorably with those for the asbestos miners as shown in Table & Still other rates for Com)ioniM Brlroern Eight Counties ,-JJjaccitt to the ehbestos-Preducing Areas and Eight Selected Cnttnliet.--To compare inng cancer mortality rates in the counties <urroumling tin- aslicstos-prudnciiig areas with another group of counties in which no as bestos miners arc likely to reside, the rates .were computed on (he basis of figures for countics7 if is h. s Province, and c- rate for Montre; would certainly very low iuiiiiIk 195(1 ami P>51, in those years sc undoubtedly beer, other years. 195C the years 1950 through 1955. The eight the United States were obtained from the . enmities selected for coni|iarisou were ,\r.' American Cancer Society, and for males, gcutcuil, CUalcaugay, Monhnaguy. Portthese were 25.3 jkt 100.000 in 1053. ami neuf, kiehlieu. Kiviere-dii-l-nup, Sj. 28.0 |*er HlO.OtKI in 1*155. They are' not ' I lyacintlic. aml Terrvliumte. mainly because identical with the rate calculated from the they represent a wide geographic distribu figures of the office of Vital Statistics, but cxiavtcil to be would result in The only po comt'arison is tlv the. persons who ties surrounding this is jioss'ibly because the American Can cer Society rates arc for males of all ages. Nevertheless, they, too, coui|iarc favorably tion througltmU the Province. The counties selected liecause of their proximity to the nsIxMos mines include Arlhalnska, Bcaucc, bcs.tos-proriucing incidence of lur. live elsewhere, in with the rates of 25 for 34 fur total cases') Drummond. I'mitivnar. Megantic, Rich- ^ Cumin,an .- obtaining among the asK-slni miners. liloiid. Slterlirooke. and WnllV. Table 22 ' Cures, I^fitii an- Turning for a moment to a coinjiarison shows the nunilier of lung cancer deaths. ! lot Miiter.r.--Al; between the asbestos miners and persons for the years 1950 through 1955 for each tioti of all the kr. who are exi>oscd to asbestos in one form of these counties, and a mortality rale. | cancer of the lu or another (as distinguished from the gen based on the adult male population in 1952. particular value : eral population groups just discuscd. who To emphasise the comparison. Mcgamic view, it is of in hare no exposure) an interesting observa County has been shown separately, as has cases tor the reco tion can lc dcvcl<n>cd by deduction, 1 (ne the Province <>f Qinlive ami also the Prov prior to the Itcgt per ** lias staleil dial there arc about 35.1X10 ince with tlte eight "asliestos-produciiig" covert.1 by the sti: persons exposed in the United States, and counties subtracted. Because of its uni(|ue the diagnosis wa we have found that the Canadian mines lung cancer death rate,. Montreal el Isle (ft coma. During lb employ nlmut 8000. Klsowhere. it has been Jesus has also been listed in onler to provide investigation, the: estimated that the workers in l'jigiaml who * further eom|etrismi. ami three siis|hx have cx|HKiire total liclwtvn .1000 and 50110. It is a|i(*.nviil from du- table that the Thnmgli Ai With workers in Africa. Denmark. Nor-. lung caucer dvath rale for the eight counties were eight deaths. MS I at. It, June. /vt Braun--7Vmin