Journal Pre-proof Risk Factors Associated with 90-day Readmissions Following Occipitocervical Fusion- A Nationwide Readmissions Database Study Christopher Elia, DO, Ariel Takayanagi, DO, Varun Arvind, BS, Ryan Goodmanson, DO, Alexander von Glinski, MD, Clifford Pierre, MD, Jeanju Sung, BS, Bilal Qutteineh, MD, Edward Jung, MD, Jens Chapman, MD, Rod Oskouian, MD PII: S1878-8750(20)32597-3 DOI: https://doi.org/10.1016/j.wneu.2020.12.031 Reference: WNEU 16481 To appear in: World Neurosurgery Received Date: 30 June 2020 Revised Date: 4 December 2020 Accepted Date: 5 December 2020 Please cite this article as: Elia C, Takayanagi A, Arvind V, Goodmanson R, von Glinski A, Pierre C, Sung J, Qutteineh B, Jung E, Chapman J, Oskouian R, Risk Factors Associated with 90-day Readmissions Following Occipitocervical Fusion- A Nationwide Readmissions Database Study, World Neurosurgery (2021), doi: https://doi.org/10.1016/j.wneu.2020.12.031. This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. © 2020 Published by Elsevier Inc.