Validity test of the assessment items

Seyyed Ali Moussavi-Najarkola AJE Vol.9 2009 76 The CEI method is a new model for assessing exposure to various risk factors that can cause UEMSDs in repetitive tasks. The method utilizes concepts from the OCRA method 10, the SI method 12, CEN 15, Kilbom 16 and ECSC 21,22,23. A CEI score of 2 must be achieved to prevent the incidence of UEMSDs. CEI can be used for classifying safe and hazardous tasks, and for proposing design solutions to correct awkward workplace situations. The model requires reliability and validation, particularly by means of a parallel and continuous study of induced UEMSDs in groups of exposed workers. CEI considers various risk factors. Parallel investigations are required to find more reasonable relationships between clinical effects and calculated index scores. Based on results obtained from tests, the model is found to be sensitive for assessing the interventions and changes in exposure and assessment items before and after ergonomic intervention. 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