Table 3. Test characteristics of clinical scales for predicting severe disease using best cut-points.

Clinical scale (and cut-point)	Sensitivity (%)	Specificity (%)	Positive Likelihood Ratio	Negative Likelihood Ratio
WHO Severe Scale: ≥2 points (95% confidence interval)	67 (40-93)	68 (60-76)	2.1 (1.3-3.4)	0.49 (0.2-1.1)
CDC Scale: ≥10 points (95% confidence interval)	83 (62-100)	58 (50-67)	2.0 (1.4-2.8)	0.29 (0.1-1.0)
Clinical Dehydration Scale: ≥4 points (95% confidence interval)	100 (74-100)	54 (45-62)	2.2 (1.8-2.6)	0.0 (NC)