TABLE 2.

Sensitivity and specificity of the ALS method in comparison with clinical diagnosis, the Kenneth Jones scoring chart, and the WHO scoring chart

Reference method and patient group	ALS method parametera (%)
	Sensitivity	Specificity	PPV	NPV
Clinical diagnosis
>5 yr	94	89	97	80
<5 yr	89	86	96	67
All children	91	87	96	74
KJSC
>5 yr	86	50	80	60
<5 yr	77	29	40	67
All children	83	36	62	63
WHO-SC
>5 yr	85	46	77	60
<5 yr	64	20	36	44
All children	78	30	58	53

^aPPV, positive predictive value, NPV, negative predictive value.