Journal of orthopaedic science : official journal of the Japanese Orthopaedic Association
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Low back pain (LBP) is a common and major health problem. Although it is known that psychosocial factors are important predictors of LBP outcome, some factors, including financial compensation, have not been fully studied in Japan. This cross-sectional study aimed to examine the association between LBP compensation (workers' compensation and automobile insurance claims) and lifetime experience of chronic LBP and back pain disability (chronic disabling LBP) in a Japanese adult population. ⋯ The prevalence of compensated LBP was low. However, a history of compensated LBP was significantly associated with experiencing chronic disabling LBP.
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Neck pain is a common health problem that restricts activities of daily living. The Neck Disability Index (NDI) was developed to assess disability in patients with neck pain. The normative score and the cut-off value are mandatory to assess an individual patient or a certain patient group for clinically important neck pain with disability, by distinguishing it from nonsignificant pain. The objective of the present study was to determine the normative score and the cut-off value of the NDI. ⋯ The normative score and the cut-off value of the NDI were determined. Our cut-off value is potentially useful in evaluating the therapeutic effectiveness of various interventions for neck pain.