Cumulative load as a risk factor for back pain.

摘要: The association between cumulative load (biomechanic and exposure time integral over the entire work experience) back pain was investigated in a group of institutional aides with physically stressful jobs. A questionnaire/interview conducted 161 these aides. point prevalence this sample 62%. Men had worked mean duration 14.3 years women 11.6 at onset first episode. Every job performed analyzed by use two-dimensional static mathematical model. compression shear thoracolumbar lumbosacral discs were computed biomechanic Cumulative significantly higher compared those without (P less than 0.05-0.01). similar to no-pain age, weight, height.