Table 3—

Diagnostic value of serum levels of procalcitonin and C-reactive protein (CRP), and the Clinical Pulmonary Infection Score (CPIS)

Optimal cut-offAUCSensitivitySpecificityNPVPPV
CRP≥19.69 mg·dL−10.71456918962.5
Procalcitonin≥2.99 ng·mL−10.87078979487.5
CPIS≥60.87378809350
Procalcitonin + CPIS#0.9616710092100
  • Data are presented as %, unless otherwise stated. AUC: area under the receiver-operating-characteristic curve; NPV: negative predictive value; PPV: positive predictive value. #: for values of both procalcitonin and CPIS above their optimal cut-off.