Document Z8vY2mnLKOR6YR3XqBod1b0gY

December 31, 1947 Kr. Eajoric J. Poirier, Saaacer Laurier (Quebec), CuadA| District St Kr. Polrieri In accordance eith the request la your lettar rf Deceater 23d, I ac enclosing a report ea the ralationahip tetveea tuberculoele aad e*beetoais for Dr. Koeaire Clagru, Secretary of Laeal University lo Quebec City. Although this le aot ea el11coda, Sr. Gtngrea aay be laterested la having it. Sincerely your*, George K. Vbeatley, I. S. Asalatent Tice-Treeldest II I Dr. Wheatley Assistant Ylce-Presidant Welftra Division In re: Mortality fron tnbergulasiB in Thetford Mines. P. 0. I do not eee that this adds inch to what you have given then already. The facta as to sex and age incidence for this one year are roughly in agreement with vhat you shoved for the period 1940-1942. 4s Dr. Cartier indicates, the occupation analysis is worthless. To find out anything regarding possible occupational in fluences from mortality statistics, beyond vhat nay be inferred from the sex and age comparison, either of the following procedures night be attempted: (a) Secure death rates by broad occupational classes for men employed in the asbestos industry and for those employed in all other industries combined by a survey of the occupational histories of the working population of the city and of the deceased workers in a definite period. It would be necessary also to determine the age cf these workers, so that significant death ratas might be calculated. (b) Secure a rough measure from a careful study of the occupations of deceased workers alone by the "proportionate mortality" method. This would require that a complete list be obtained of workera in the asbestos industry who died from any cause in the survey period and the number of these who died from tuberculosis. The proportion of deaths from tuberculosis to total deaths at a glvaa aga could then ba compared with the corresponding proportion for non-asbestos workers. The method has obvious faults but can be useful. It would be necessary to study the deaths for a number of years in order to obtain representative percentages. August 2, 1945 7-4