Epidemiological field studies to study the association between workstation characteristics, work posture and musculoskeletal disorder among office workers. Findings have been inconsistent regarding the putative adverse effect of work postures
true association
underestimation of the true association might be present in studies due to misclassification of subjects to risk and no-risk categories based on questionnaires responses
objective of this study was to estimate the amount of misclassification resulting from the use of questionnaires