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Table 4 Inter-assay test variability for different test samples in different dilution steps using patient samples

From: Clinical analysis on diagnostic accuracy of Bosch Vivalytic SARS-CoV-2 point-of-care test and evaluation of cycle threshold at admission for COVID-19 risk assessment

Sample dilution factor

CT-value

CT-value

CT-value

Mean

SD*

CV** (%)

1:2

29.2

28.5

29.3

29

0.44

1.5

1:1

30.3

27.5

32.1

29.97

2.32

7.74

1:100

27.8

31.3

28.5

29.2

1.85

6.34

1:1000

29

31.9

35.5

32.13

3.26

10.13

  1. *SD = Standard Deviation; **Coefficient of Variation