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Table 2 Inter-test variability for different test samples in different dilution steps using inactivated whole pathogen sample

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

31.9

31

33

31.97

1.00

3.1

1:1

30.5

31.8

31.9

31.4

0.78

2.5

1:100

31.7

34.9

31.5

32.7

1.91

5.8

1:1000

33.7

38.3

36.7

36.23

2.33

6.4

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