Total n = 96, of which SIRS = 36, bacterial sepsis = 49, and viral sepsis = 11. (A) Breakdown of infected patients by organism type. (B and C) ROC curves for the SMS and the bacterial/viral metascore. (D) Distribution of scores and cutoffs for IADM. (E) Confusion matrix for IADM. Bacterial infection sensitivity, 89.7%; bacterial infection specificity, 70.0%; viral infection sensitivity, 54.5%; viral infection specificity, 96.5%.