Table 4.

Sensitivity and specificity for detecting cases of WaSt at thresholds for WAZ and MUAC found using ROC analysis and Youden’s Index

Case-definitiona	Sensitivity (%)b	Specificity (%)b
WAZ < − 2.6	98.47 [98.39, 98.56]	91.07 [91.03, 91.11]
MUAC < 133 mm	81.03 [80.76, 81.30]	79.52 [79.46, 79.58]

^aThe case-definitions found using ROC analysis and Youden’s Index

^bIntervals (ranges) are expressed in ISO 31–11 form. The form [a,b] expresses the interval a ≤ x ≤ b. For example, [98.39, 98.56] is used to represent a 95% confidence interval that ranges between 98.39 and 98.56%