Grip Strength Assessed Using A Hand Grip Dynamometer And Michigan Hand Outcome Questionnaire As Predictors Of Work-Related Musculoskeletal Disorders Using Rapid Upper Limb Assessment Among Power Loom Silk Weavers

Abstract

Background: Sericulture is a labor-oriented agro-based industry that significantly elevates India's rural economy. During weaving operations, workers adopt awkward postures and work long hours, which is one of the most important factors in their poor working efficiency and prevalence of musculoskeletal disorders. Objectives: This study aimed to find the correlation between grip strength, the Michigan hand outcome questionnaire (MHQ), and work-related postural disorders among power loom silk weavers. Design: Correlation study. Methods: This study was conducted in a community setting. 120 power loom silk weavers were screened for work-related musculoskeletal disorders. A face-to-face interview was conducted to assess Grip strength, hand function, and work-related musculoskeletal disorders using the Hand dynamometer, MHQ, and RULA scales, respectively. Results: By Spearman's correlation, the correlation between Bilateral Hand grip strength and MHQ was statistically significant p<0.001 and shows a strong positive correlation (r = 0.787) for right hand and (r = 0.741), a strong negative correlation (r = -0.594) for right hand and ( r = -0.538) for left hand was found between bilateral hand grip strength and RULA and the correlation between MHQ and RULA scores were statistically significant (p<0.001) shows a strong negative correlation (r = -0.583).The intercept is 8.298. An increase in MHQ (-0.022) and right-hand grip strength (- 0.030) will decrease RULA scores. Conclusion: The study concluded that subjects with reduced hand grip strength and hand function were at higher risks of developing work-related musculoskeletal disorders, and hand grip strength and MHQ are equally good predictors of these disorders.