Assessment of Clinical Diagnosis, Microscopy, Rapid Diagnostic Tests, and Polymerase Chain Reaction in the Diagnosis of Plasmodium falciparum in Nigeria

Table 2

Sensitivity, specificity, and predictive values of the three diagnostic methods.

Diagnostic methods	Parameter for assessment
	TP; (no)	FP; (no)	TN; (no)	FN; (no)	Sensitivity (%)	Specificity (%)	PPV (%)	NPV (%)
TFM	71	35	90	21	77.2	72	67	81.1
RDT	71	13	90	43	62.3	87.4	84.5	67.7
PCR	71	54	90	2	97.3	62.5	56.8	97.8
Composite reference	71	0	90	0	100	100	100	100

TP: true positive; FP: false positive; TN: true negative; FN: false negative; TFM: thick film microscopy;
RDT: rapid diagnostic test; PCR: polymerase chain reaction; no: number; %: percent.