None of 25 routine laboratory tests were clinically useful for diagnosing long COVID, despite some slight differences in results between patients with and without prior SARS-CoV-2 infection, according to an analysis of the RECOVER-Adult cohort.
Among participants with a post-acute sequelae of COVID-19 (PASC) index of 12 points or higher, there were no meaningful differences in mean laboratory values when compared with those with a PASC index of zero, reported Kristine Erlandson, MD, MSc, of the University of Colorado, Anschutz Medical Campus, in Aurora, and colleagues in the Annals of Internal Medicine.