Spine
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A retrospective, long-term follow-up study. ⋯ 4.
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Multicenter Study Comparative Study
Balloon Kyphoplasty Versus Conservative Treatment for Acute Osteoporotic Vertebral Fractures With Poor Prognostic Factors: Propensity Score Matched Analysis Using Data From Two Prospective Multicenter Studies.
A multicenter, prospective, single-arm, intervention study. ⋯ 4.
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Systematic review and meta-analysis. ⋯ 4.
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A retrospective case series. ⋯ 4.
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Retrospective study of a national database. ⋯ 3.