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. 2020 Jul 20:aqaa133. doi: 10.1093/ajcp/aqaa133

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© American Society for Clinical Pathology, 2020. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com

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Comparison of cycle threshold (CT) by age. The mean (dots) and interquartile range (whiskers) of CT values obtained for Target 1 and Target 2 are plotted for patients in the indicated age ranges. The mean value of Target 1 CTs was significantly lower than the cumulative mean of all Target 1 CT values (*P = .028) for patients age 80-89 years, indicating potentially higher viral load in these specimens.