Incidence of Acute, Progressive, and Delayed Proximal Junctional Kyphosis Over an 8-Year Period in Adult Spinal Deformity Patients

Autor: Samantha R. Horn, Eric O. Klineberg, Douglas C. Burton, Renaud Lafage, Avery E. Brown, Christopher P. Ames, Peter G. Passias, Breton Line, Munish C. Gupta, Nicholas Stekas, Gregory M. Mundis, Jeffrey L. Gum, Frank A. Segreto, Virginie Lafage, Robert A. Hart, Shay Bess, Christopher I. Shaffrey, Bassel G. Diebo, Cole Bortz, Justin S. Smith, Frank J. Schwab, Alan H. Daniels, Pierce D. Nunley, D. Kojo Hamilton, Yael Ihejirika
Rok vydání: 2019
Předmět:
Zdroj: Operative Neurosurgery. 18:75-82
ISSN: 2332-4260
2332-4252
DOI: 10.1093/ons/opz128
Popis: BACKGROUND Proximal junctional kyphosis (PJK) is a common radiographic complication of adult spinal deformity (ASD) corrective surgery. Although previous literature has reported a 5 to 61% incidence of PJK, these studies are limited by small sample sizes and short-term follow-up. OBJECTIVE To assess the incidence of PJK utilizing a high-powered ASD database. METHODS Retrospective review of a prospective multicenter ASD database. Operative ASD patients > 18 yr old from 2009 to 2017 were included. PJK was defined as ≥ 10° for the sagittal Cobb angle between the inferior upper instrumented vertebra (UIV) endplate and the superior endplate of the UIV + 2. Chi-square analysis and post hoc testing assessed annual and overall incidence of acute (6-wk follow-up [f/u]), progressive (increase in degree of PJK from 6 wk to 1 yr), and delayed (1-yr, 2-yr, and 3-yr f/u) PJK development. RESULTS A total of 1005 patients were included (age: 59.3; 73.5% F; body mass index: 27.99). Overall PJK incidence was 69.4%. Overall incidence of acute PJK was 48.0%. Annual incidence of acute PJK has decreased from 53.7% in 2012 to 31.6% in 2017 (P = .038). Overall incidence of progressive PJK was 35.0%, with stable rates observed from 2009 to 2016 (P = .297). Overall incidence of 1-yr-delayed PJK was 9.3%. Annual incidence of 1-yr-delayed PJK has decreased from 9.2% in 2009 to 3.2% in 2016 (P
Databáze: OpenAIRE