Clinical Orthopaedics and Related Research ®

A Publication of The Association of Bone and Joint Surgeons ®

Online First™

Articles

Results of Database Studies in Spine Surgery Can Be Influenced by Missing Data

Bryce A. Basques MD, Ryan P. McLynn BS, Michael P. Fice BS, Andre M. Samuel MD, Adam M. Lukasiewicz MD, MSc, Daniel D. Bohl MD, MPH, Junyoung Ahn MD, Kern Singh MD, Jonathan N. Grauer MD
28th November 2016, Symposium: Learning From Large-Scale Orthopaedic Databases

National databases are increasingly being used for research in spine surgery; however, one limitation of such databases that has received sparse mention is the frequency of missing data. Studies using these databases often do not emphasize the percentage of missing data for each variable used and do not specify how patients with missing data are incorporated into analyses. This study uses the American College of Surgeons National Surgical Quality Improvement Program (ACS-NSQIP) database to examine whether different treatments of missing data can influence the results of spine studies.