Salivary C-reactive protein and mean platelet volume as possible diagnostic markers for late-onset neonatal pneumonia

Table 5 Diagnostic validity (area under the curve, sensitivity, specificity) for salivary C-reactive protein to predict serum C-reactive protein > 6 (n = 31) from serum C-reactive protein ≤ 6 (n = 9) in the patient group (n = 40)

Parameter	AUC	95%CI	P value	Cut-off Value	Sensitivity	Specificity	PPV	NPV
sCRP	0.89	0.77-1.1	< 0.001a	> 3.2	91.3	71.4	91.3	71.4

^aP < 0.05.

AUC: Area under the curve; CI: Confidence interval; NPV: negative predictive value; PPV: Positive predictive value; sCRP: Salivary C-reactive protein.