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Table 3 SARS-CoV-2 RT-PCR results in presumptive positive and negative specimens

From: Clinical and epidemiologic characteristics of inconclusive results in SARS-CoV-2 RT-PCR assays

Presumptive results

RT-PCR results

Allplex (re-test)

Real-Q

BioCore

DiaPlexQ

Fleiss’ κ

Specimens from confirmed cases \((n=124)\)

 Presumptive positive (45/124, 36.3%)

Positive

16 (35.6%)

40 (88.9%)

9 (20%)

43 (95.6%)

 − 0.176

Inconclusive

28 (62.2%)

5 (11.1%)

29 (64.4%)

2 (4.4%)

 

Negative

1 (2.2%)

0 (0%)

7 (15.6%)

0 (0%)

 

 Presumptive negative (79/124, 63.7%)

Positive

2 (2.5%)

4 (5.1%)

1 (1.3%)

28 (35.4%)

 − 0.001

Inconclusive

49 (62.0%)

21 (26.6%)

59 (74.7%)

23 (29.2%)

 

Negative

28 (35.5%)

54 (68.3%)

19 (24.0%)

28 (35.4%)

 

Specimens from screening cases \((n=36)\)

 Presumptive negative (36/36, 100%)

Positive

0 (0%)

0 (0%)

0 (0%)

0 (0%)

 − 0.001

Inconclusive

15 (41.7%)

3 (8.3%)

2 (5.6%)

0 (0%)

 

Negative

21 (58.3%)

33 (91.7%)

34 (94.4%)

36 (100%)

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