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Table 4 Accuracy of influenza self-test compared to reference specimen PCR

From: Evaluating an app-guided self-test for influenza: lessons learned for improving the feasibility of study designs to evaluate self-tests for respiratory viruses

 

True positive

False positive

True negative

False negative

Sensitivity (95%CI)

Specificity (95%CI)

PPV (95%CI)

NPV (95%CI)

Participant interpretation of self-test

6

68

603

37

0.14 (0.05, 0.28)

0.90 (0.87, 0.92)

0.08 (0.03, 0.17)

0.94 (0.92, 0.96)

Expert interpretation of image of self-test

5

7

637

38

0.12 (0.04, 0.25)

0.99 (0.98, 1.00)

0.42 (0.15, 0.25)

0.94 (0.92, 0.96)