Document yDzGwLaR5gyQ3rgNp1K3JBgE

tIAL HEALTH JilWG CAWHR IS' ASMSTOS MISERS i TjULC 19.--Aar Distribution of Adult Mates />`r Tarlk 20.--Annual Death Rates per lOOfiOO far j lit Province of Quebec, 1951 * Cancer of the Lung in Canada* ri PvOTtne* Sptdfled tvtmarj ~ Tout Prorid ' IT M % s Ul IU 17 Me (ln4jp . SuttU* -**.................. #44................. ................ . iH-....... ............ Tout____ va.m muu \M4 113,467 I.IM.495 .. 1`rfnttUfi 43 .. ia U ' 10* IU) ST luppon.ltM. In Colktft. > 100 i matter of the same intensity of interest as it is in younger persons. Onwpi of Yfftr# Set Umtip IM1 1033 IMMV43 ttalrr.V 90-34 33-30 40-44 43-49 SKM 5359 . 60-04 63-09 70-74 73-79 40-W + AO Aset 04 oj ^ - jj 44 14 194 134 UJ to.? UJ 14 11.4 2J 04 04 34. u 134 UL9 774 334 344 904 304 774 144 7.1 ._ tuo-tvs? 14 04 34 4 164 374 394 774 10X4 M4 634 394 714 134 Bpacttod Frtatry Tout . hm| fcl . sr.T 4.7 u XU <u 4U Table 18 also answers a question pre viously raised. It shows that the members 4,f the dbhort have not died from lung canleer at an age earlier than the general popu lation, and .that such an explanation cannot UU 3be offered for the absence of lung cancer jin 240-men with more than 40 years of Uloa tor ISM, u cirri; ' ffnudoynrent referred to mi |k <MJ. * "Mortilltr tmm Ijaat Cinrrr to 1HI to ISO. increase is particularly marked after age 50, confirming an observation previously made, to the effect that until recently lung cancer has probably been underdiagnosed in the older age groups in the general popu- l.lltfJII. A Before leaving this conqtrisim of the rued in Table i Province with the miners, it should be. d number 'of ' shown that their age distributions are reaiot 'significantly i sonably the same. That this is the case can mber of deaths, ^be observed from Table.19. 1954 and 1955 1 It should be remembered that the miners is true that, in tretire anti consequently, it can be expected if 65 and over, jihat the oldest age group will be larger in( figure which is fthe general imputation. The data presented level. How- 3in Table 20 indicate that the lung cancer iat this number Irate generally decreases after age 70. Thered but unproved |f|jre. we could expect the rate for all people . Furthermore, lover 65 to be smaller than the rate for the To use these figures for purposes of comparison, it is necessary to combine the rates for certain age groups in nrder to conform to the age distributions used in this study. Since the exact populations in each age group for the years indicated is not known, this must be .an approximation. However, the rates would be somewhat as follows: Ace Croup 26-44 45-54 55-44 <5+ Rili 5 27 60 *' 00-91 e nta for the ep'0UP between 65 and 75" which would apply jTStated in this ,(le olJest gcoup of miners. It is felt reason that the ]1,'at **>' usin *he whole adult male popula- very old is not I1'0"' we *uve developed rates for the gen eral population which are somewhat lower the Actual and mg Cancer uang '$ ithan if we had been able to exclude the "Jpeople in the general population over 75. - A comparison between the asbestos miners yul the population of the nonunion as a __' OtanHH,. WDwh' uhc* Frond .Tow V 1 t whole was made, using statistical material from several sources. In one source, Phil lips1* gave age- and sex-specific rates for Canada for three periods between 1931 and 1952. The rates for males are given in These rales are, in general, lower than those developed for the total (proved and suspected) cases of lung cancer among the asbestos miners. The only large difference, however, is in the age group of 65 years anti over, and it is quite possible that the rate for this group may have increased for Canada between 1952 and 1954 as it did for the Province of Quebec (Table 17). A further emtqiarison has been nude-with an over-all rate obtained from the American Cancer-Society for respiratory cancer deaths in Canada in 1953. This rate, for males. Is 20.8 per 100,000, or 5 more per 100,000 Table 20. than Phillips' 1950-1952 rate, and compares' Qaahit These figures show strikingly the increase with 25.3 per 100.000 for proved cases and ilia rates between 1931 and 1952, and . this 33.8 per 100,000 for total cases among the rol i/. Sunt. Jo<f gromi- Tmnn 647 4 1 .'M'* ' .. ` ** t V \'\ .. - ri ' t* * t *. f : :4 f. r- *' 11