Snap-fit assembly and upper limb functional limitations in automotive production workers: a nested case-control study
Johan Ohlander1, Mekail-Cem Keskin2, Stephan W Weiler2
1Institute and Outpatient Clinic for Occupational, Social and Environmental Medicine, University Hospital Munich, Ziemssenstrasse 1, 80336, Munich, Germany. johan.ohlander@med.uni-muenchen.de.
Summary
Automotive workers exposed to snap-fit assembly face increased risk of upper limb functional limitations (ULFL). Increased exposure duration correlates with a higher risk of developing these musculoskeletal disorders.
Area of Science:
- Occupational Health
- Musculoskeletal Disorders
- Automotive Manufacturing
Background:
- Snap-fit assembly is a standard in automotive production.
- Potential adverse effects on workers' upper limb function are indicated by cross-sectional data.
- Understanding the relationship between snap-fit use and upper limb issues is crucial.
Purpose of the Study:
- To analyze incident cases of upper limb functional limitations (ULFL).
- To determine the association between ULFL and exposure to snap-fit assembly in automotive workers.
Main Methods:
- A nested case-control study was conducted with 5139 automotive production workers.
- Cases with ULFL were matched with controls based on employment duration.
- Conditional logistic regression modeled the risk of ULFL based on snap-fit assembly exposure, adjusted for gender and BMI.
Main Results:
- 64 ULFL cases were identified over 20610.8 person-years.
- Cases had significantly longer exposure to snap-fit assembly than controls.
- Each person-year of snap-fit exposure increased ULFL risk by approximately 20% (OR 1.23).
Conclusions:
- An association between accumulated snap-fit exposure and upper limb musculoskeletal disorders is confirmed.
- Company physicians should monitor for ULFL symptoms in workers using snap-fits.
- Development of threshold values for snap-fit insertion forces is recommended.
Keywords:
Blue-collar workersCar-part assemblingMusculoskeletal disordersOccupational exposureUpper extremitiesMore Related Videos
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