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. 2015 Jul 1;9(7):OC01–OC04. doi: 10.7860/JCDR/2015/12468.6147

[Table/Fig-6]:

Sensitivity, Specificity, Positive Predictive Value and Negative Predictive Value of Procalcitonin combined with each of the three scores

Severity Tool Mortality
Sensitivity Specificity PPV NPV
PCT ≥ 2 ng/ml + PSI(IV+V) 100 59.18 23.07 100
PCT ≥ 2 ng/ml + CURB-65 ≥ 3 100 69.38 28.57 100
PCT ≥ 2 ng/ml + CRB-65 ≥ 3 100 73.47 31.58 100