Do workplace interventions prevent low-back disorders ? If so, why ? a methodologic commentary.
The demand for workplace interventions to prevent low-back disorders has increased in recent years.
At the same time, a crisis in the literature has become apparent : there are conflicting reports on whether or not these interventions work.
With the aim of understanding the reason for the dissension in the literature, six studies were selected for close examination.
These were studies of interventions based on differing principles, i.e. a change in organizational ethos to promote back safety, back belt use, the introduction of ergonomic devices, and back-strengthening exercises.
If the studies are taken at face value, any of the interventions, regardless of type, has a tremendous effect.
Methodological problems inherent in these studies may provide a clue to why essentially different interventions were found to be consistently successful.
Study design quality has long been noted to exert a particular influence on the evaluation of outcomes : the quality of the study design is often inversely related to reported outcomes.
Of the six studies selected for examination, four did not include a contemporaneous control group, five did not randomly assign subjects to test and control groups, and none included a placebo group.
Given these research designs, variables other than those tested by the studies may have produced the reported results.
These variables include'beliefs of the intervention providers'and'coalescence of the work group'both of which are discussed. (...)
Mots-clés Pascal : Poste travail, Rachialgie, Prévention, Ergonomie conception, Méthodologie, Exposition professionnelle, Médecine travail, Système ostéoarticulaire pathologie, Rachis pathologie, Homme, Système musculosquelettique pathologie
Mots-clés Pascal anglais : Workplace layout, Rachialgia, Prevention, Applied ergonomics, Methodology, Occupational exposure, Occupational medicine, Diseases of the osteoarticular system, Spine disease, Human, Musculoskeletal diseases
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0134848
Code Inist : 002B29C01. Création : 16/11/1999.