Table 6.

Receiver operating characteristic (ROC) analysis of severity markers in patients with Plasmodium knowlesi malaria

Variable	AUC (95% CI)
Pigment-containing neutrophil count in cells/μl	0.8561 (0.7328 – 0.9794)
Parasite count in parasites/μl (thick film)	0.8261 (0.7075 – 0.9447)
Parasite count in % IRBC (thin film)	0.8476 (0.7536 – 0.9416)
Platelet count in x 103 platelets/μl†	0.7723 (0.6775 – 0.8671)

AUC area under ROC curve.

95% CI 95% confidence interval.

% IRBC % infected red blood cells.

NA not assessed.

^†This analysis was made on the inverse function of the platelet count.