Table 3.

Sensitivity, Specificity, AUC, PLR, NLR, PPV, and NPV of Combinations of Symptoms and Signs for Distinguishing Pandemic H1N1/09

KCDC, Korea Centers for Disease Control and Prevention; AUC, area under the ROC curve; PLR, positive likelihood ratio; NLR, negative likelihood ratio; PPV, positive predictive value; NPV, negative predictive value; CI, confidence interval; NC, not calculated.

The KCDC criteria for suspicion of pandemic H1N1/09 infection were cases in which patients suffered from an unexplained fever (defined as an ear temperature ≥37.8℃ or antipyretics within 12 hours before hospital visit) within seven days before hospital visit and displayed symptoms such as a cough, sore throat, rhinorrhea, or nasal obstruction.