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. 2022 Aug 2;12(8):e059111. doi: 10.1136/bmjopen-2021-059111

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© Author(s) (or their employer(s)) 2022. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

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Inclusion flow of emergency department (ED) patients (pts) in three external centres. All ED presentations with routine venous blood sampling were included. Missingness of laboratory panels was assessed for the 11 variables in the CoLab-score (see table 2). Re-presentations after a positive PCR result or clinical COVID-19 registration were excluded as ‘previous COVID-19+’. Presentations with any laboratory result above the limits of the CoLab-score (see table 2) were excluded.