Document b5w0XVZDGN5kkLQgN1x92771k

/ 41. These figures show strikingly (ho Iscreaee In raise between 1951 tad 1952, and this Increase Is particularly marked cftor age 50, confirmtag an observation previously made, to the effect that until recently lung cancer has probably been under-diagnosed In the older age groups In.the general population. - To use tbooo figures lor purposes ot comparison. It Is necessary t* combine the rates for certain age groups la order to conform to tho ego (Ulrlbutlons ueod In this study. Slues tho oxact populations In osch age-group (or tho years Indicated le not known, this must be an approximation. However, Us rates would be eomewbat as loUowsi Ago Grouj^ 20-44 45-54 55-64 65 4 Rato 5 27 69 90-95 These rales ers, lafgoneral, lower than these developed for tho Istal (proved and suspected) cases of lung cancer among tho asbestos miners, lbs ouly large difference, however, le In tho age group of 65 years and over, lad It Is quite possible that tha rate for thlo group may have Increased for Canada boiween 1952 and 1954 a* It did for the Provloco of Quebec. (Sec Table J5.) f'j 0291