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[Inter-rater agreement on self-reported exposure to ergonomic risk factors for the upper extremities among mechanic assemblers in an automotive industry].

OBJECTIVES
to assess reproducibility of self-reported exposure to ergonomic hazards for the upper limbs, measured through a questionnaire based on a diffused checklist for the assessment of ergonomic risk (OCRA) in a sample of mechanical assemblers of an automotive industry.


DESIGN
cross-sectional study; reproducibility was assessed as interrater agreement of a composite index of ergonomic risk, estimated through the intraclass correlation coefficient (ICC).


SETTING AND PARTICIPANTS
58 mechanical assemblers, working in 29 twin areas, characterised by same work stations and tasks.


MAIN OUTCOME MEASURES
composite index of ergonomic risk for the upper limbs.


RESULTS
reproducibility of the ergonomic index was high in the overall sample (ICC: 0.81) and it was higher for the twin areas employing same-gender workers (ICC: 0.96), compared to those with workers of the opposite gender (ICC: 0.66).


CONCLUSION
these results indicate that a questionnaire measuring with a great detail the exposure to the main ergonomic risk factors for the upper limbs, as the one based on the OCRA checklist used for this study, would allow to obtain a highly reproducible ergonomic index. If its validity against the corresponding observational checklist will be found elevated by future studies, this questionnaire may represent a useful tool for a preliminary assessment of workers' exposure to ergonomic hazards for the upper limbs.