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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)