Spine
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The Spine End Results Registry (2003-2004) is a registry of prospectively collected data of all patients undergoing spinal surgery at the University of Washington Medical Center and Harborview Medical Center. Insurance data were prospectively collected and used in multivariate analysis to determine risk of perioperative complications. ⋯ 3.
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Repeated measures design. ⋯ N/A.
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Fresh-frozen human cadaveric biomechanical study. ⋯ N/A.
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Retrospective cohort study. ⋯ 4.
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Cross-sectional, retrospective. ⋯ 3.