Spine
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Retrospective analysis of data extracted from the MarketScan database (2000-2016) using International Classification of Diseases (ICD)-9, ICD-10, and Current Procedural Terminology-4 codes. ⋯ 3.
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Retrospective comparative study. ⋯ 3.
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A prospective study of cardiopulmonary function in patients with congenital scoliosis (CS). ⋯ 3.
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A nonrandomized, prospective, and single-center clinical trial. ⋯ 4.
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Level 3, cohort study. ⋯ 3.