Spine
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A reliability and validity study of a previously translated version of the Roland-Morris Disability Questionnaire (RMDQ). ⋯ The RMDQ is a robust unidimensional ordinal measure, largely free of differential item functioning, which works well in the Turkish population. Nonparametric effect sizes of ordinal scales are found to overestimate or underestimate the true effect size depending on the nature of the scale and the distribution of patients at baseline.
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Axial load-dependent changes in the lumbar spine of supine healthy volunteers were examined using a compression device compatible with magnetic resonance imaging. ⋯ The axial force of 50% body weight in supine posture simulates the upright lumbar spine morphologically. No change in intervertebral angle occurred at L4-L5. However, disc height at L4-L5 decreased significantly during compression.
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Randomized Controlled Trial Clinical Trial
Cost effectiveness of periradicular infiltration for sciatica: subgroup analysis of a randomized controlled trial.
A subgroup analysis of a prospective, randomized controlled trial was performed. ⋯ In addition to short-term effectiveness for contained herniations and lesions at L3-L4-L5, steroid treatment also prevented surgery for contained herniations. However, steroid was countereffective for extrusions. The results of the subgroup analyses call for a verification study.