RT Journal Article SR Electronic T1 External Validation of the COVID-NoLab and COVID-SimpleLab Prognostic Tools JF The Annals of Family Medicine JO Ann Fam Med FD American Academy of Family Physicians SP 548 OP 550 DO 10.1370/afm.2872 VO 20 IS 6 A1 Ebell, Mark H. A1 Lennon, Robert P. A1 Tarn, Derjung M. A1 Barrett, Bruce A1 Krist, Alex H. A1 Dong, Huamei A1 Cai, Xinyan A1 Mainous, Arch G. A1 Zgierska, Aleksandra E. A1 Tuan, Wen-Jan A1 Goyal, Munish YR 2022 UL http://www.annfammed.org/content/20/6/548.abstract AB 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 available online (https://ebell-projects.shinyapps.io/covid_nolab/ and https://ebell-projects.shinyapps.io/COVID-SimpleLab/).