Physical and psychosocial risk factors for musculoskeletal disorders in Brazilian and Italian nurses

As part of the international CUPID investigation, we compared physical and psychosocial risk factors for musculoskeletal disorders among nurses in Brazil and Italy. Using questionnaires, we collected information on musculoskeletal disorders and potential risk factors from 751 nurses employed in public hospitals. By fitting country-specific multiple logistic regression models, we investigated the association of stressful physical activities and psychosocial characteristics with site-specific and multisite pain, and associated sickness absence. We found no clear relationship between low back pain and occupational lifting, but neck and shoulder pain were more common among nurses who reported prolonged work with the arms in an elevated position. After adjustment for potential confounding variables, pain in the low back, neck and shoulder, multisite pain, and sickness absence were all associated with somatizing tendency in both countries. Our findings support a role of somatizing tendency in predisposition to musculoskeletal disorders, acting as an important mediator of the individual response to triggering exposures, such as work-load.

Como parte da pesquisa internacional CUPID, comparamos os fatores de risco físico e psicossocial para distúrbios osteomusculares entre enfermeiras no Brasil e na Itália. Foram coletados dados com questionários sobre distúrbios osteomusculares e seus fatores de risco potenciais com 751 enfermeiros de hospitais públicos. Com modelos de regressão logística específicas para cada país, investigamos a associação entre atividades físicas estressantes e as características psicossociais, com dores em sítios específicos e múltiplos, assim como ausências motivadas por doença. Não encontramos clara relação entre dor lombar e levantamento de pesos, porém dores no pescoço e ombros foram as mais relatadas entre as enfermeiras que realizam trabalho prolongado, com braços elevados. As dores na lombar, pescoço, ombros e em múltiplos sítios foram associadas à tendência somatizante e à ausência por doença em ambos os países. Nossos achados reforçam o papel da tendência somatizante como fator predisponente para distúrbios osteomusculares, atuando como um importante mediador da resposta individual.

The authors are grateful to Dr. Marco Conti, Dr. Luciano Riboldi, Dr. Lorenzo Bordini and Raquel Rapone Gaidzinki for their valuable support in data collection at the hospitals involved in the study. The Brazilian branch of the study was financially supported by Colt Foundation (CF/03/95).