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. 2021 Mar 8;21:91. doi: 10.1186/s12911-021-01441-w

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© The Author(s) 2021

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

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Fig. 2 — Visual representation of data tables extracted from Cerner Millenium EMR systems. Cerner EMR systems were extracted as data tables which are linked by encounter key. Data tables were linked by encounter key and include information about encounters, diagnoses (ICD-10 and SNOMED CT), pathology, forms (e.g. ED triage assessments, medication forms, discharge letters), notes (e.g. progress notes) and many more. Encounter level information were further linked to person level information by person key and included patient medical history and social history. The size of the raw file associated with each table is shown next to the table name. The data tables are listed in order of file size with the biggest files related to free-text information and scanned ECG images. The figure represents data extracted for a single 3 month time period (1/4/17–30/6/17)