D-dimer triage for COVID-19.

Coagulopathy and elevated D-dimer levels were recognized as prognostic factors early in Wuhan, China as accompanying more severe COVID-19 patient cases. We sought to determine the accuracy of normal vs elevated D-dimer blood levels at presentation, day 1, and on day 3 for predicting 28-day survival in a large cohort of consecutive PCR-proven COVID-19 patients, to help with patient triage, reassurance, and follow-up management.