Structural equation analysis and modeling of upper limb WMSDs and their adverse ergonomic factors
10.3760/cma.j.cn121094-20240703-00296
- VernacularTitle:上肢WMSDs及其不良工效学因素的结构方程分析与建模
- Author:
Siwu ZHONG
1
;
Ning JIA
;
Xin SUN
;
Meibian ZHANG
;
Qing XU
;
Huadong ZHANG
;
Ruijie LING
;
Yimin LIU
;
Gang LI
;
Yan YIN
;
Hua SHAO
;
Jue LI
;
Hengdong ZHANG
;
Bing QIU
;
Dayu WANG
;
Qiang ZENG
;
Rugang WANG
;
Yan YE
;
Bin XIAO
;
Hua ZOU
;
Jianchao CHEN
;
Dongxia LI
;
Yongquan LIU
;
Qinghua SHI
;
Jixiang LIU
;
Enfei JIANG
;
Jun QI
;
Liangying MEI
;
Xianfeng ZHAO
;
Mimi YANG
;
Xinwei GUO
;
Zhi WANG
;
Zhongxu WANG
Author Information
1. 广州市职业病防治院职业健康监护中心，广州 510620
- Publication Type:Journal Article
- Keywords:
Musculoskeletal system;
Work-related musculoskeletal disorders;
Fatigue;
Ergonomic factors;
Structural equation model
- From:
Chinese Journal of Industrial Hygiene and Occupational Diseases
2025;43(4):254-263
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To explore the structural relationship between WMSDs in the upper limbs and various risk factors in the occupational population in China, based on a large sample epidemiological survey and structural equation analysis, and to establish a structural equation model, so as to lay a foundation for the prevention and control of such diseases.Methods:The Chinese version of the Musculoskeletal Disorders Electronic Questionnaire was used to conduct a nationwide survey on the prevalence of WMSDs in the upper extremity. Six factors related to WMSDs in the upper extremity were extracted by the classification standard of adverse ergonomic factors and their source and confirmatory factor analysis, including work organization, work type, upper extremity work posture, individual factors, upper extremity fatigue and upper extremity WMSDs. The structural equation analysis was carried out and the structural equation model was established.Results:The incidence of WMSDs and fatigue in the upper limbs was 24.44% and 43.76%, respectively. The adjusted structural equation model fitting indicators were generally up to the standard (GFI=1.000, AGFI=1.000, RMSEA=0.043, NFI=0.808, TLI=0.784) . The four exogenous latent variables of work organization, work type, upper limb work posture and individual factors were correlated. There was a strong positive correlation between job type and upper limb work posture ( r=0.865) , a moderate positive correlation between work organization and job type and upper limb work posture ( r=0.570, 0.490) , and a weak negative correlation between individual factors and the other three exogenous latent variables. Upper limb work posture and individual factors had direct effects on upper limb WMSDs, and the effect coefficients were 0.10 and 0.06, respectively. Upper limb fatigue played a mediating role between work organization, work type, upper limb work posture and upper limb WMSDs. The effect coefficient was 0.46, and the composition ratios of indirect effects were 100.0%, 100.0%, and 38.3%, respectively. The direct path effect of upper limb work posture, individual factors and upper limb WMSDs was weaker than the mediating path through upper limb fatigue. Conclusion:When carrying out the prevention and control of upper limbWMSDs, it is necessary to comprehensively consider the pathogenesis path of upper limb muscle fatigue and upper limb WMSDs caused by work organization, work type, and upper limb work posture, so as to provide theoretical reference for improving the prevention and control level of such diseases.
