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December/January 2009/2010 (vol. 06/4)
A systematic review of health and safety business cases (18 papers covering 26 studies) finds that most studies lack randomisation or controls and tend to attribute any after-the-event positive effect to the intervention. Most evidence came from North America though four studies were from Sweden and two from the UK. Nineteen of the studies assessed ergonomic interventions to prevent musculoskeletal disorders. Eighteen were simply before and- after comparisons, with no control groups, and calculations rarely included estimates of statistical uncertainty.
Scandinavian Journal of Work, Environment & Health 2009; 35(6): 403–413. http://www.sjweh.fi/show_abstract.php?abstract_id=1355
Occupational Health at Work December/January 2009/2010 (vol. 06/4) pp40