Table 2 Contingency matrices for the test set of the (A) research assay and (B) InSignia assay, defining the true positive, true negative, false positive, and false negative rates for detecting viral infection, with reference to the clinical respiratory pathogen panel as the ‘gold standard’ (n = 38).

From: Evaluating the InSignia IFI27 expression assay for detecting viral respiratory infection compared to a traditional gene normalisation assay

(A)

Respiratory pathogen panel

(B)

Respiratory pathogen panel

Research assay

Viral

Non-viral

Total

InSignia

assay

Viral

Non-viral

Total

Viral

22 (TP)

0 (FP)

22

Viral

27 (TP)

0 (FP)

27

Non-viral

7 (FN)

9 (TN)

16

Non-viral

2 (FN)

9 (TN)

11

Total

29

9

38

Total

29

9

38

  1. TP = True Positive; FP = False Positive; FN = False Negative; TN = True Negative