WRULMSDs risk assessment methods have profuse use at industrial workstations risk evaluation. The actual European Standard EN1005-5 is based in different methods being OCRA one of them. The present study aims at to evaluate the relationships between MSDs diagnosis and results of OCRA evaluation.
In a risk management perspective all workers and workplaces at five departments in an automobile plant were evaluated. Workers (n=372) that present symptoms during one year were submitted to a medical examination by a orthopedist to identify workers with musculoskeletal diseases. OCRA checklist was applied in the same workplaces (n=186). Workplaces with moderate/high scores (n=57) on WRULMSDs risk (OCRA score ¡Ý16,5) were videotaped and analyzed with ERGOrom software at elbow, wrist and fingers for means of OCRA predictive validity. The effect of each independent risk factor on final OCRA score was analyzed by multivariate linear regression modelling (R-square-stepwise).
The results of musculoskeletal diseases evaluation identify an important number of symptomatic workers (n=95). MSDs cases per department denote some agreement with OCRA moderate/high risk scores. Risk factors contribution for OCRA final score (R-square= 0.997) is distinct: frequency (¦Â=0,891), force (¦Â=0,737), additional risk factors II (¦Â=0,649), posture (¦Â=0,413) and additional risk factors I (¦Â=0,163). Predictive validity of OCRA for risk factors is 0,66 for repetitivity, 0,62 for posture, 0,80 for force and 0,76 for vibration exposure.
OCRA checklist WRULMSDs risk assessment is an important tool to use in industries namely when occupational hazards includes force. There are significant relationships between MSDs diagnosis and results of OCRA evaluation. The obtained results points out, once more, to the utility of observational methods in WRULMSDs risk assessment and also in the importance of the analysis of the results instead of a ¡°blind¡± use of the obtained scores.