Effect of certification on injury rates, 2005-2012
In brief
- Occupational health and safety interventions, including regulatory approaches, programs, and management systems, are key strategies for reducing worker injury and illness.
- We conducted an independent impact evaluation of WorkSafeBC’s Certificate of Recognition (COR) audit program to assess how participation has affected firms’ claim rates and health and safety experience. COR programs provide premium rebates to employers who meet certain occupational health and safety management benchmarks or who have implemented a return to work program for injured workers.
- The evaluation found that certification is associated with lower injury rates. However, the COR program appears to be identifying good performers, and participation may be associated with other factors that are driving the injury rate reduction.
Next steps
- We are currently evaluating the effect of the COR program in Alberta, with a grant from the Alberta Ministry of Labour OHS Futures Research Funding Program.
- We are currently assessing and developing the BC Construction Safety Alliance’s COR audit database, in preparation for a future investigation of the effect of the COR program on firm injury claim rates.
Watch an interview with Chris McLeod, filmed by the Journal of Commerce at the BC Road Builders and Heavy Construction Association Fall Conference 2015, on the results of the COR evaluation.
Watch a plain language video produced by the Institute for Work & Health explaining the main findings of the COR evaluation.
Related publications
Certificate of Recognition in BC: How has COR impacted injury rates in the construction sector?
Conference presentation [578KB]
McLeod C. Ontario Infrastructure Health and Safety Association OCGA Leadership Day. Mississauga, ON: Feb. 19, 2016.
An audit-based occupational health and safety recognition program: Is certification associated with lower firm work-injury rates?
Research brief [299 KB]
Based on research presented in McLeod C, Quirke W, Koehoorn M. Evaluation of the effect of an audit-based occupational health and safety recognition program on firm work-injury rates in British Columbia, Canada. Final Report to WorkSafeBC. Vancouver: Partnership for Work, Health and Safety; 2015. [Full report available by request only.]
Evaluation of an audit‐based occupational health and safety certification program on firm work‐injury rates in British Columbia, Canada
Conference presentation
McLeod C, Quirke W. Canadian Association for Research on Work and Health (CARWH) conference. Saskatoon, SK: Oct. 19-22, 2014.
Evaluating OHS prevention programs: An example of a voluntary audit-based prevention program in British Columbia
Conference presentation
McLeod C.
Occupational and Environmental Health Rounds, University of Toronto. Toronto, ON: Oct 2, 2014.
Evaluation of an audit-based OH&S recognition program on firm work-injury rates
Conference presentation
McLeod C, Quirke W. Epidemiology in Occupational Health (EPICOH) Conference. Chicago, IL: June 24-27, 2014.
Changing the Present: Implementing and evaluating workplace interventions to improve occupational health and safety
Conference presentation [590KB]
Amick B, McLeod C. Association of Workers’ Compensation Boards of Canada Learning Symposium. Saint John, NB; Sept. 17, 2013.


