Abstract
Objectives: Hand-arm vibration syndrome (HAVS) consists of vascular and neurological component. Musculoskeletal component has not been delineated yet. In the present follow-up study, we evaluated the prevalence of HAVS and the cumulative exposure to vibration among a cohort of forestry workers. Special interest was given to numbness and musculoskeletal disorders of upper extremity and neck in forestry workers. Methods: A follow-up study starting from 1976 was conducted among forestry workers in Suomussalmi in Finland. Total exposure of hand-arm vibration was recorded during 11 cross-sectional surveys. The last study was carried out in 1995. The lifetime dose of vibration energy was calculated. A cohort of 52 forest workers participated to all 11 cross-sectional surveys 1976–1995. HAVS and musculoskeletal disorders were evaluated. Results: The prevalence of active vibration white finger (VWF) decreased from 13 to 4% in the cross-sectional study. In the cohort VWF decreased from 17 to 8% and numbness increased from 23 to 40%. Rotator cuff syndrome (P=0.034) and epicondylitis (P=0.004) associated with numbness. Regional neck pain was diagnosed in 38% of workers and associated with low back pain. In modeling VWF, the lifelong vibration energy (OR 1.03, CI 1.01–1.05), and smoking (OR 7.36, CI 1.07–50.76) were significant. Numbness was modeled by pain in upper extremities (OR 12.43, CI 2.42–63.80) and neck pain (5.97, CI 1.25–28.39), not by lifelong vibration energy. Right rotator cuff syndrome was modeled by age (OR 2.58, CI 1.04–6.41) and lifelong vibration energy (OR 1.04, CI 1.00–1.07). Conclusions: The prevalence of VWF constantly decreased. Numbness did not follow the vibration exposure profile. Numbness also associated with upper extremity musculoskeletal disorders. Hand-arm vibration associated with the right rotator cuff syndrome in forestry workers.
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Acknowledgments
The authors wish to acknowledge the provision of financial assistance by the Finnish National Board of Forestry and by North Karelian Hospital and by Forestry Workers Fund in Finland. We greatly appreciated the support of other members of the research team, especially Kaija Koskimies, and the staff of regional health clinic at Ämmänsaari, Finland. We remain indebted to the forestry workers who generously and patiently donated their time.
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Sutinen, P., Toppila, E., Starck, J. et al. Hand-arm vibration syndrome with use of anti-vibration chain saws: 19-year follow-up study of forestry workers. Int Arch Occup Environ Health 79, 665–671 (2006). https://doi.org/10.1007/s00420-006-0099-2
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DOI: https://doi.org/10.1007/s00420-006-0099-2