Spine
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Comparative Study
Demographic and health characteristics of rural- and urban-dwelling canadians with chronic back disorders: a population-based comparison.
This is a cross-sectional design based on analysis of a national survey. ⋯ 2.
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Randomized Controlled Trial Multicenter Study Observational Study
The effect of high obesity on outcomes of treatment for lumbar spinal conditions: subgroup analysis of the spine patient outcomes research trial.
Spine Patient Outcomes Research Trial subgroup analysis. ⋯ 3.
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Retrospective propensity score-matched analysis on a national database (MarketScan) between 2006 and 2010. ⋯ 3.