Document VJkJL3z6QzxRXJVpy2QDaagv8

Summirv and Conclusions Interest la the question oI whether there msy be an association between lung cencer and exposure to Asbestos bss beon evident since the report (n 1935 by Lynch And Smith of o esse In which lung cancer and ashes- tosts were both present. As additional cases In which the two diseases co\' axlsted were reported, a causal association appears to have been gradually accoptod by many authors, although some workers considered the correlation 0/St>e*7?9/r&i/ to be inconclusive. The present study was cwnwloslsasd in an effort to determine whether a causal relationship did, la fact, exlat between exposure to asbestos and cancer of tho lung. Since most oarller' studies had been limited to enumerating the .lung cancors found In certain selected samples, such as cases coming to autopoy dr death certificates In which asbestosls who mentioned. It was apparent that V> ' they could not fulllll the requirements ot an epidemiological and statistical approach to the problem. The preeont study was, therefore,- designed to meet the requirements of this method. After a preliminary ourvey to explore the availability of reliable Information, data were gathered on workers In the asbestos mines In Ouebec, St 6 'f **" based on their medical record*. A cohort > defined tarltle ` *i,***4T r/**r*G - ^>rc /"avrr </ Or't'fr/ crhoi3La=and-nit-anrV.pra_<y>..^-T-rt ihrnit nlln T ......ill bt* -/<<. ,rJ y>- ,/ro^ny trS rf J~ *- Data relative to their cbaracteriellcs were collected and their etatus at the end of a ala-year-perlod of observation was determined. In the case of those who had died, u axhauottve torch of death certificates and insurance rocords