Journal
CLINICAL INFECTIOUS DISEASES
Volume 72, Issue 2, Pages 323-326Publisher
OXFORD UNIV PRESS INC
DOI: 10.1093/cid/ciaa722
Keywords
COVID-19; SARS-CoV-2; RT-PCR; test characteristics; nasopharyngeal
Categories
Funding
- National Institute of General Medical Sciences [T32 GM086270-11]
- National Institute on Drug Abuse [K23 DA046686]
- National Institutes of Health
- National Science Foundation [1914873, 1812559]
- Direct For Computer & Info Scie & Enginr
- Division Of Computer and Network Systems [1812559] Funding Source: National Science Foundation
- Direct For Computer & Info Scie & Enginr
- Div Of Information & Intelligent Systems [1914873] Funding Source: National Science Foundation
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This study analyzed 20,912 patients from 2 large academic health systems and found that the frequency of individuals testing negative initially but testing positive later within 7 days was 3.5%, which was consistent across different institutions.
Using data for 20 912 patients from 2 large academic health systems, we analyzed the frequency of severe acute respiratory syndrome coronavirus 2 reverse-transcription polymerase chain reaction test discordance among individuals initially testing negative by nasopharyngeal swab who were retested on clinical grounds within 7 days. The frequency of subsequent positivity within this window was 3.5% and was similar across institutions.
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