External Validation of the COVID-NoLab and COVID-SimpleLab Prognostic Tools

Mark H. Ebell, Robert P. Lennon, Derjung M. Tarn, Bruce Barrett, Alex H. Krist, Huamei Dong, Xinyan Cai, Arch G. Mainous, Aleksandra E. Zgierska, Wen Jan Tuan, Munish Goyal

Research output: Contribution to journalArticlepeer-review


Our objective was to externally validate 2 simple risk scores for mortality among a mostly inpatient population with COVID-19 in Canada (588 patients for COVID-NoLab and 479 patients for COVID-SimpleLab). The mortality rates in the low-, moderate-, and high-risk groups for COVID-NoLab were 1.1%, 9.6%, and 21.2%, respectively. The mortality rates for COVID-SimpleLab were 0.0%, 9.8%, and 20.0%, respectively. These values were similar to those in the original derivation cohort. The 2 simple risk scores, now successfully externally validated, offer clinicians a reliable way to quickly identify low-risk inpatients who could potentially be managed as outpatients in the event of a bed shortage. Both are avail-able online (https://ebell-projects.shinyapps.io/covid_nolab/ and https://ebell-projects.shiny apps.io/COVID-SimpleLab/).

Original languageEnglish (US)
Pages (from-to)548-550
Number of pages3
JournalAnnals of family medicine
Issue number6
StatePublished - Nov 1 2022

All Science Journal Classification (ASJC) codes

  • Family Practice


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