Variations in Data Collection Methods Between National Databases Affect Study Results: A Comparison of the Nationwide Inpatient Sample and National Surgical.

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Variations in Data Collection Methods Between National Databases Affect Study Results: A Comparison of the Nationwide Inpatient Sample and National Surgical Quality Improvement Program Databases for Lumbar Spine Fusion Procedures by Daniel D. Bohl, Glenn S. Russo, Bryce A. Basques, Nicholas S. Golinvaux, Michael C. Fu, William D. Long, and Jonathan N. Grauer J Bone Joint Surg Am Volume 96(23):e193 December 3, 2014 ©2014 by The Journal of Bone and Joint Surgery, Inc.

The number of spine surgery publications using NIS and NSQIP per year since 2000, based on a PubMed search on October 14, 2013, for all studies containing two-way combinations of the search terms “spine,” “spinal,” “ACDF,” “cervical,” “thoracic,” “lumbar,”... Daniel D. Bohl et al. J Bone Joint Surg Am 2014;96:e193 ©2014 by The Journal of Bone and Joint Surgery, Inc.

The distributions of patient age. Daniel D. Bohl et al. J Bone Joint Surg Am 2014;96:e193 ©2014 by The Journal of Bone and Joint Surgery, Inc.

A comparison of comorbidity rates between NIS and NSQIP. The left graph gives the rates at which each comorbidity was documented in each of the databases. Daniel D. Bohl et al. J Bone Joint Surg Am 2014;96:e193 ©2014 by The Journal of Bone and Joint Surgery, Inc.

A comparison of inpatient adverse event rates between NIS and NSQIP. The left graph gives the rates at which each inpatient adverse event was documented in each of the databases. Daniel D. Bohl et al. J Bone Joint Surg Am 2014;96:e193 ©2014 by The Journal of Bone and Joint Surgery, Inc.

Before-discharge rates compared with after-discharge rates of adverse events in NSQIP. The left graph gives the rates at which each adverse event occurred before discharge and after discharge, as well as the total rate of each adverse event. Daniel D. Bohl et al. J Bone Joint Surg Am 2014;96:e193 ©2014 by The Journal of Bone and Joint Surgery, Inc.