Table 3.

Predictors of malaria and HIV seropositivity in study population and their sensitivity and specificity

Clinical variable	Sensitivity% (90% CI)	Specificity% (90% CI)	PPV% (90% CI)	NPV% (90% CI)
Prolonged diarrhoea	26.8 (15.2–36.8)	95.3 (89.7–98.2)	65.3 (42.4–78.6)	85.6 (69.8–79.1)
Chronic cough	42.4 (30.3–55.1)	89.7 (92.2–93.5)	80.2 (60.6–90.1)	83.1 (78.2–88.2)
Prolonged fever	45.6 (35.4–59.1)	90.3 (88.6–93.6)	67.8 (58.6–85.6)	84.3 (77.3–86.2)
Sensitivities and specificities of a clinical algorithm consist of above variables.

CI, confidence interval; PPV, positive predictive value; NPV, negative predictive value.