On July 1 st 2014, the province of Ontario introduced a program of mandatory occupational health and safety (OHS) awareness training. The objective of this study was to evaluate the impact of this program on worker level self-reported OHS awareness and empowerment to participate in injury prevention activities in Ontario, compared to the province of British Columbia (BC) where no similar program was introduced.We collected information on OHS awareness and empowerment, as well as participation

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... OHS training from samples of workers in Ontario and BC on four occasions. The first survey was conducted between May and June 2014 (prior to the introduction of mandatory training); then additional surveys were completed in February/March 2015, September/October 2015, and November/December 2017. For each cross-sectional sample we recruited over 1800 respondents, with a total sample of over 7500 respondents (63% from Ontario) across all time points. Logistic regression models were used to examine a time by province interaction in each outcome, after adjusting for a variety of workplace and worker characteristics.After the introduction of mandatory awareness training respondents in Ontario were almost twice as likely to participate in training compared to respondents in BC. However, we observed no difference in trends over time (pre-post introduction of mandatory training) in levels of adequate awareness or empowerment between Ontario and BC. Respondents in Ontario had higher levels of adequate OHS awareness than respondents in BC at all time points (both before and after the introduction of mandatory awareness training). No differences were present between Ontario and BC in relation to empowerment.Taken together, these results suggest that the introduction of mandatory awareness training in Ontario was associated with greater training participation. However, no differences in levels of adequate awareness or empowerment were observed between Ontario respondents compared to BC respondents.