Table 3.

Sensitivity and specificity of clinical diagnosis and clinical algorithm scores by season and age subgroups to detect malaria parasitemia

Characteristic	Sensitivity (%)	95% CIa	Specificity (%)	95% CI
General population (n = 8941; positive films = 1762)
Clinical diagnosis Scoreb	43	40–45	84	83–85
≥2.0	57	54–59	71	70–72
≥2.5	47	45–50	83	82–84
≥3.0	36	34–38	89	88–90
January–June (n = 4660; positive films = 738)
Clinical diagnosis Score	42	38–45	84	83–85
≥2.0	54	50–57	72	71–74
≥2.5	43	39–46	84	83–85
≥3.0	30	27–34	90	89–91
July–August (n = 2264; positive films = 375)
Clinical diagnosis Score	27	22–31	87	86–89
≥2.0	40	35–45	77	75–79
≥2.5	34	29–39	84	82–86
≥3.0	24	20–29	91	89–92
September–December (n = 2016; positive films = 649)
Clinical diagnosis Score	53	49–57	81	79–83
≥2.0	70	66–73	61	58–64
≥2.5	60	56–64	76	73–78
≥3.0	50	46–53	83	81–85
Less than 6 years old (n = 2791; positive films = 710)
Clinical diagnosis Score	40	36–43	84	83–86
≥2.0	59	55–62	66	64–68
≥2.5	49	45–53	79	77–80
≥3.0	34	31–38	89	87–90
Between 6 and 14 years old (n = 2614; positive films = 631)
Clinical diagnosis Score	47	43–51	79	77–80
≥2.0	58	54–62	65	63–67
≥2.5	51	47–54	76	74–78
≥3.0	41	37–45	84	82–86
More than 14 years old (n = 3536; positive films = 421)
Clinical diagnosis Score	42	37–47	88	86–89
≥2.0	51	46–55	79	78–81
≥2.5	40	35–45	89	88–90
≥3.0	32	27–36	93	92–94

^aCI: confidence interval.

^bScore composed as described in the text.