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. 2021 May 22;21:168. doi: 10.1186/s12911-021-01531-9

Table 2.

Influenza diagnosis status versus laboratory test results

Influenza diagnosis Laboratory results
PCR+ PCR− Total
ICD10+ 2381 146 2527
ICD10− 378 13,534 13,912
Total 2759 13,680 16,439
Accuracy measures (95% CI)
 Sensitivity 86.3 (85.0–87.6)
 Specificity 98.9 (98.7–99.1)
 PPV 94.3 (93.2–95.1)
 NPV 97.3 (97.0–97.5)

PPV positive predictive value, NPV negative predictive value