Statistical Tests: Not applicable: No statistical tests. Results:
Implementation Intermediate OHS
Outcomes Final OHS Outcomes Cost of Intervention Economic Outcomes
Effect estimates: Premium rate declined from 1.51 (pre-intervention 1990) to 1.13 (post-intervention 1992-5 average). Accumulated savings 1991-1995. $2,866,000.
Did the Design Lack Statistical Power? Not applicable.
Were Any Harms of the Intervention Identified? Increase in staff abuse during study period, but cause not established. IWH Reviewers’ Comments:
Health care industry’s premium rate declined to a lesser extent, thereby controlling for any compensation system-related changes. The estimate of financial benefits could have been improved by including a sensitivity analysis on the premium rate assumed for the absence of intervention for the 1991-95 period. Other data in the paper and supporting papers support the interpretation that the financial benefit is attributable to prevention efforts.
Institute for Work & Health