Construct validity, internal consistency and test-retest reliability of ergonomic risk assessment for musculoskeletal disorders in office workers (ERAMO)

Abstract

Musculoskeletal disorders (MSDs) have a multifactorial etiology, therefore, their assessment should consider all of individual, physical and psychosocial factors. The Ergonomic risk assessment for musculoskeletal disorders in office workers (ERAMO) is a few specific tools available to evaluate the nature and occurrence of MSDs in office workers and the impact of individual and ergonomic aspects of office workers. The purpose of this study was to perform a construct validity (confirmatory factor analysis; CFA) and verify the reliability, internal consistency of the ERAMO in office workers. A sample of 300 workers from two of government enterprise in Bangkok, Thailand participated in this validation and internal consistency analysis. Intraclass correlation coefficient was used for the statistical analysis of test-retest reliability. The calculation of internal consistency, reproducibility provided evidence of reliability and lack of redundancy. The psychometric properties of the ERAMO were assessed using CFA, which revealed 3 models. For 2 models, the comparative fit index (CFI), goodness-of-fit index (GFI), and non-normed fit index (NNFI) each achieved 0.90, the Chi-square and root mean square error of approximation (RMSEA) demonstrated better values. The results provided this ERAMO tool is a choice that can use for ergonomic risk assessment in office workers. Supplemental data for this article is available online at https://doi.org/10.1080/1463922X.2021.1922780 .