Extraction, harmonization, and secure transfer of EHR data

TB Timothy B. Baker
WL Wei-Yin Loh
TP Thomas M. Piasecki
DB Daniel M. Bolt
SS Stevens S. Smith
WS Wendy S. Slutske
KC Karen L. Conner
SB Steven L. Bernstein
MF Michael C. Fiore
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EHR data extraction code was created by programmers at UW School of Medicine and Public Health (Madison, WI), Yale New Haven Health (New Haven, CT), and Bluetree Network, Inc.26 (Supplementary Methods Text).

The extraction code was customized at each healthcare system to map to their EHR data to yield relatively uniform data sets. Additional data harmonization and quality assurance was done by CEC-UW staff (Supplementary Methods Text). Secure transfer of data from each of the 21 healthcare systems was accomplished via the transfer of data files to a secure SFTP (secure shell [SSH] File Transfer Protocol) portal located at the UW-Madison CEC-UW Coordinating Center.

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