Spine
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Multicenter Study
Operative duration as an independent risk factor for postoperative complications in single-level lumbar fusion: an analysis of 4588 surgical cases.
Multicenter retrospective cohort study. ⋯ 3.
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Prospective multicenter study of patients who underwent pediatric spinal deformity correction with posterior spinal fusion and instrumentation. ⋯ 4.
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Multicenter Study
Responsiveness and interpretability of the Portuguese version of the Quebec Back Pain Disability Scale in patients with chronic low back pain.
A prospective cohort study with a 6-week follow-up of patients with chronic low back pain undergoing physiotherapy. ⋯ N/A.