Effect estimates: Implemented; implementation in progress; not started yet (1993/1996): 8%/45%; 25%/36%; 67%/19%.
Outcomes Final OHS Outcomes Cost of Intervention Economic Outcomes
Did the Design Lack Statistical Power? Not applicable.
Were Any Harms of the Intervention Identified? No. IWH Reviewers’ Comments:
The respondents would have a vested interest in overstating their implementation, but this is unlikely to explain all of the change seen between 1993 and 1996. Data from Gaupset (2000) show that a measure of implementation constructed from responses to questions about particular activities yields similar estimates as the self-assessment. There do not seem to be alternative explanations for the observed change.
Effectiveness of Occupational Health & Safety Management Systems: A Systematic Review