Role of Clinical Presentations and Routine CSF Analysis in the Rapid Diagnosis of Acute Bacterial Meningitis in Cases of Negative Gram Stained Smears

Table 6

Validation of CSF and blood parameters in detecting bacterial meningitis.

Parameters	Sensitivity (%)	Specificity (%)	Accuracy (%)	PPV (%)	NPV (%)
CSF protein	88	52	78	84	60
CSF glucose	47	84	57	89	37
CSF neutrophil	69	77	71	89	48
Serum CRP	74	84	77	93	54
Peripheral WBC	48	76	55	85	35

PPV: positive predictive value; NPV: negative predictive value.