Interactions between physical and psychosocial demands of work associated to low back pain

Revista de Saúde Pública

Rita De Cássia Pereira Fernandes²  Fernando Martins Carvalho²  Ada Ávila Assunção¹  Annibal Muniz Silvany Neto² 

[1] ,Universidade Federal da Bahia Faculdade de Medicina da Bahia Departamento de Medicina Preventiva e SocialSalvador BA ,Brasil

关键词: Psychological stress;    Low Back Pain;    Exertion;    Cumulative Trauma Disorders;    Occupational Health;    Cross-Sectional Studies;    Estresse Psicológico;    Dor Lombar;    Esforço Físico Transtornos Traumáticos Cumulativos;    Saúde do Trabalhador;    Estudos Transversais;    Estrés Psicológico;    Dolor de la Región Lumbar;    Esfuerzo Físico;    Trastornos de Traumas Acumulados;    Salud Laboral;    Estudios Transversales;   

DOI  :  10.1590/S0034-89102009000200014

来源: SciELO

【 摘 要 】

OBJECTIVE: To examine the interaction between physical and psychosocial demands of work associated to low back pain. METHODS: Cross-sectional study carried out in a stratified proportional random sample of 577 plastic industry workers in the metropolitan area of the city of Salvador, Northeast Brazil in 2002. An anonymous standard questionnaire was administered in the workplace by trained interviewers. Physical demands at work were self-rated on a 6-point numeric scale, with anchors at each end of the scale. Factor analysis was carried out on 11 physical demand variables to identify underlying factors. Psychosocial work demands were measured by demand, control and social support questions. Multivariate analysis was performed using the likelihood ratio test. RESULTS: The factor analysis identified two physical work demand factors: material handling (factor 1) and repetitiveness (factor 2). The multiple logistic regression analysis showed that factor 1 was positively associated with low back pain (OR=2.35, 95% CI 1.50;3.66). No interaction was found between physical and psychosocial work demands but both were independently associated to low back pain. CONCLUSIONS: The study found independent effects of physical and psychosocial work demands on low back pain prevalence and emphasizes the importance of physical demands especially of material handling involving trunk bending forward and trunk rotation regardless of age, gender, and body fitness.

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