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Canadian Respiratory Journal
Volume 16, Issue 5, Pages 148-152
Original Article

Filing for Workers’ Compensation among Ontario Cases of Mesothelioma

Jennifer Isabelle Payne1,2,3 and Erin Pichora4

1Cancer Care Nova Scotia, Canada
2Department of Diagnostic Radiology, Dalhousie University, Halifax, Nova Scotia, Canada
3Department of Community Health and Epidemiology, Dalhousie University, Halifax, Nova Scotia, Canada
4Population Studies and Surveillance, Cancer Care Ontario, Toronto, Ontario, Canada

Copyright © 2009 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


BACKGROUND/OBJECTIVE: For many types of cancer, disease attribution to occupational exposures is difficult. Mesothelioma, however, is a ‘sentinel’ occupational cancer associated with asbestos exposure. The present study linked workers’ compensation claims data with cancer registry data to explore the completeness of reporting of mesothelioma to the Ontario Workplace Safety and Insurance Board (WSIB) according to characteristics of cases diagnosed among Ontario residents.

METHODS: Two data sources were linked at the person level: the WSIB Occupational Disease Information and Surveillance System and the Ontario Cancer Registry. Filing rates were calculated as the proportion of Ontario Cancer Registry mesothelioma cases (International Classification of DiseasesOncology code 905) that linked to a WSIB-filed cancer claim. Filing rates were calculated for the period 1980 to 2002, and trends were calculated by year, age and county of residence at diagnosis.

RESULTS: The filing rate for compensation has increased little over the past 20 years, reaching a high of 43% in 2000. Overall, filing rates were highest among pleural mesothelioma cases among men (range 27% to 57%). Filing rates were highest among individuals 50 to 59 years of age and declined substantially throughout the retirement years. There was substantial variation in filing rates by area of residence, with the highest rate being in Lambton County, Ontario.

CONCLUSION: The filing rate for compensation in Ontario was much lower than the estimated proportion of cases eligible for compensation. The increased filing rate in Lambton County was likely related to this community’s awareness of the association between asbestos and mesothelioma. Physicians can play an important role in educating patients of their potential entitlement to compensation benefits.