title: Vertebroplasty and kyphoplasty are associated with an increased risk of secondary vertebral compression fractures: a population-based cohort study.
abstract: To better understand the risk of secondary vertebral compression fracture (VCF) following a vertebroplasty or kyphoplasty, we compared patients treated with those procedures to patients with a previous VCF. The risk of subsequent fracture was significantly greater among treatment patients, especially within 90 days of the procedure.
  
  
  BACKGROUND
  Predominantly uncontrolled studies suggest a greater risk of subsequent vertebral compression fractures (VCFs) associated with vertebroplasty/kyphoplasty. To further understand this risk, we conducted a population-based retrospective cohort study using data from a large regional health insurer.
  
  
  METHODS
  Administrative claims procedure codes were used to identify patients receiving either a vertebroplasty or kyphoplasty (treatment group) and a comparison group of patients with a primary diagnosis of VCF who did not receive treatment during the same time period. The main outcomes of interest, validated by two independent medical record reviewers, were any new VCFs within (1) 90 days, (2) 360 days, and (3) at adjacent vertebral levels. Multivariable logistic regression examined the association of vertebroplasty/kyphoplasty with new VCFs.
  
  
  RESULTS
  Among 48 treatment (51% vertebroplasty, 49% kyphoplasty) and 164 comparison patients, treated patients had a significantly greater risk of secondary VCFs than comparison patients for fractures within 90 days of the procedure or comparison group time point [adjusted odds ratio (OR) = 6.8; 95% confidence interval (CI) 1.7-26.9] and within 360 days (adjusted OR = 2.9; 95% CI 1.1-7.9).
  
  
  CONCLUSIONS
  Patients who had undergone vertebroplasty/kyphoplasty had a greater risk of new VCFs compared to patients with prior VCFs who did not undergo either procedure.
authors.affiliation: Center for Education & Research on Therapeutics (CERTs) of Musculoskeletal Disorders, University of Alabama at Birmingham, Birmingham, AL 35294-3408, USA.
authors.forename: A S
authors.initials: AS
authors.lastname: Mudano
authors.forename: J
authors.initials: J
authors.lastname: Bian
authors.forename: J U
authors.initials: JU
authors.lastname: Cope
authors.forename: J R
authors.initials: JR
authors.lastname: Curtis
authors.forename: T P
authors.initials: TP
authors.lastname: Gross
authors.forename: J J
authors.initials: JJ
authors.lastname: Allison
authors.forename: Y
authors.initials: Y
authors.lastname: Kim
authors.forename: D
authors.initials: D
authors.lastname: Briggs
authors.forename: M E
authors.initials: ME
authors.lastname: Melton
authors.forename: J
authors.initials: J
authors.lastname: Xi
authors.forename: K G
authors.initials: KG
authors.lastname: Saag
mesh_terms: D000368:Aged; D000407:Alabama; D015331:Cohort Studies; D005260:Female; D050815:Fractures, Compression / Q000209:etiology* / Q000601:surgery; D006801:Humans; D007738:Kyphosis / Q000601:surgery; D008159:Lumbar Vertebrae / Q000601:surgery; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D012307:Risk Factors; D016103:Spinal Fractures / Q000209:etiology* / Q000601:surgery; D013904:Thoracic Vertebrae / Q000601:surgery; D016896:Treatment Outcome; D054854:Vertebroplasty / Q000009:adverse effects*
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