Document v1mLQJ95bb9EBorQX2GK1ovVw

METHODOLOGY FOR DEFINING POSSIBLE OCCUPATIONAL ASBESTOS EXPOSURE Employment histories of cases, controls, and spouses were collected from three sources; 1) death certificates, 2)CTR files (cases and spouses with history of malignant tumor), and 3)city directories. Job and industry codes were assigned to all information available for a given Individual using the 1970 U.S. Census of occupations and industries.* From a complete listing of all job and industry codes a subset of those with possible or probat asbestos exposure was selected by H.C.L. using several references from the literature.* This process was facilitated by the translation of these codes to their matching SIC* codes for which detailed associated product descriptions were available. A 5-digit employer code (3-digit unique ID and 2-digit division number) was also assigned when knowledge of a specific employer was available. An independent search of State of Ct. Labor Dept, files for information on inspections of Ct. manufacturers from to with respect to their usage of hazardous materials will provide an indication of which of these coded employers either produced or used asbestos in their manufacturing processes. - All three factors (job, industry, employer) will serve as indicators of possible occupational asbestos exposure. Cases, controls, and spouses which fall into the occupational exposure group will be studied in greater detail on an individual basis. (<v Musky Ocxlf> \rxt o provable Celery ffem vofitoi Sou^teP av<uUbU h> H-CL. cUjsk*eJ> ol ' ytssi'bk ecfoudej beau$i of School bft(W^3. \tv COAflAUOtb^^ 0^ HliI eytovylf, SckoaliacUerf uSe ok ojbesta wak^ralf ** K LaO e***MUuj6 oU Ibp , ffZcuj^tSjvviJ luatdvv^ ^ "la dtAgputoe#-sfduae* cwuP (A&yrtieZ, ^*4 ibe ^ dilec cus&JtMs t He #j Okie/) |1*M4X (kP t WQ cWfi , UCC 004908 A00474