Document wgkXxQBK4MxG0Xbe5pGkrLjy4

13 The present ttui))'. In contrast to tho earlier, works, has.been plea sed to utilize the epidemiological method. A woll-doflnod group oi asbestos miser* be* bees establlsbsd la such a way (bat It constitutes a good sample el tbs whole populattoa oi asbestos minors la Quebec. Data lor all member* el this group hare been collected and analyzed. Those concerning lung can* cer have received most careful consideration. Details of the methods on. ployed will be set forth later, but the type of approach la considered to per* mil of lair comparisons and valid generalizations. Collection and Analysis of Data ~ A preliminary survey of potential source* of Information In Febru- try of 1956 Involved discussions with the pbyelclans In charge of the asbestos companies1 program* and with clinicians, pathologists, representative* of City and Provincial hoalth departments and of the Canadian Cancer Socloty, and other Interested persons. It wes found that morbidity data, although some- V *" * l what limited, were evallable from.ouch sourcos as the hospitals In Montreal aadQuebec City, and the 13 Cancer Detection Canters In the Province. How ever. because of tho high mortality ta lung cancer, it eoemed advisable to- depend upon data relating to deethe. These wo found to bo obtainable at the vital statistics department of tbs Ministry of Health In Quebec City. From the preliminary survey. It we* apparent that oztonslvo and dotatlsd Information could be gathered with respoct to both the percoue omployod In the. asbestos mining Industry and mortality figures for tho general population. 0262