Measure Overall Influenza A Influenza B
True Positive 540 345 192
True Negative 1611 1910 2057
False Positive 47 15 41
False Negative 170 98 78
Sensitivity (95% CI) 76.1, (72.8-79.1) 77.9 (73.8-81.5) 71.1 (65.4-76.2)
Specificity (95% CI) 97.2 (96.2-97.9) 99.2 (98.7-99.5) 98.0 (97.4-98.6)
Positive predictive value (95% CI) 92.0 (89.5-93.9) 95.8 (93.2-97.5) 82.4 (77.0-86.8)
Negative predictive value (95% CI) 90.5 (89.0-91.7) 95.1 (94.1-96.0) 96.3 (95.5-97.1)