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. 2022 Jun 29;54(5):623–628. doi: 10.1016/j.pathol.2022.04.001

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© 2022 Royal College of Pathologists of Australasia. Published by Elsevier B.V. All rights reserved.

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Fig. 2 — High Ct values in a SARS-CoV-2 diagnostic assay are not associated with poor biological sampling. Average number of 18S RNA copies at (A) Ct cut-off=36, (B) Ct cut-off=38, (C) Ct cut-off= 40. Average number of CCR5 copies at (D) Ct cut-off=36, (E) Ct cut-off=38, (F) Ct cut-off= 40. The dotted horizontal bar represents the median and the error bars represent the interquartile range. (G) Association between the average number of 18S RNA copies and Ct value, and (H) average number of CCR5 copies and Ct value. Dataset for the average number of 18S copies was transformed and then comparison was made using an unpaired t-test (Welch's t-test). Comparison of the average number of CCR5 copies was made using the Mann–Whitney U test. Associations were made using a Spearman correlation. ns, p>0.05, ∗p<0.01.