Spine
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Randomized Controlled Trial Multicenter Study Comparative Study Observational Study
Long-Term Results of Surgery Compared with Nonoperative Treatment for Lumbar Degenerative Spondylolisthesis in the Spine Patient Outcomes Research Trial (SPORT).
Randomized trial with a concurrent observational cohort study. ⋯ 1.
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Community-based, cohort study. ⋯ 2.
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Multicenter Study
Prediction Accuracy of Common Prognostic Scoring Systems for Metastatic Spine Disease: Results of a Prospective International Multicentre Study of 1469 Patients.
A prospective multicenter cohort study. ⋯ 3.
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Systematic review. ⋯ 4.