Spine
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Multicenter Study
Differential Psychometric Properties of EuroQoL 5-Dimension 5-Level and Short-Form 6-Dimension Utility Measures in Low Back Pain.
Prospective study. ⋯ 2.
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Retrospective study using prospectively collected registry data. ⋯ 3.
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This study retrospectively analyzes prospectively collected data. ⋯ 3.
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Retrospective cohort study. ⋯ 4.
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This cohort study was an analysis of prospectively collected data in the DaneSpine Database. ⋯ 3.