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  • Facilitators/

Barriers Statistical Tests:

Not applicable.

Results: Implementation

Intermediate OHS Outcomes Final OHS Outcomes Cost of Intervention Economic Outcomes

Not applicable Not applicable

Not applicable

Not applicable

WC premium rates declined each year over the study period and the authors report that rates were reduced from 4.7564% in 1993/94 to 1.323% in 1999/2000 (% of remuneration). Individual business units’ “net premium rate as a percentage of remuneration” was also compared to Industry net premium rate, with Manningham having lower premiums in 19 of the 20 business units for the year 1999-2000.

Facilitators/ Not applicable Barriers

Did the Design Lack Statistical Power? Not applicable: no statistical tests.

Were Any Harms of the Intervention Identified? No. IWH Reviewers’ Comments:

The implementation of Quality Management Systems and Environmental Management systems at virtually the same time as the OHSMS may have contributed to the results seen here. Also, the number of claims was also decreasing at the time, suggesting that the change in premium rates was due to a change in injury experience. (However, we have not reported these latter results above, due to a judgment at the QA phase that there was potential bias in methods of measurement). There was already a trend of decreasing premium rates prior to the intervention. Thus, estimate of change due to the intervention might be overestimated.

Institute for Work & Health

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