Table 3.

ROC curve analysis of MUAC cut-off values among adolescent for severe thinness

Age, y	Area under curve (95% CIa)	Cut-off value (cm)	Youden Index, J	Sensitivity (%)	Specificity (%)	PPV (%)	NPV (%)	Correctly classified (%)
Males
10	0.81 (0.76, 0.85)	16.4	0.61	75.7	85.4	23.8	98.3	84.9
11	0.81 (0.78, 0.84)	17.6	0.62	85.5	76.7	24.8	98.3	77.4
12	0.83 (0.80, 0.86)	18.1	0.66	87.6	78.1	27.8	98.5	78.9
13	0.85 (0.82, 0.88)	18.8	0.70	89.1	80.6	27.5	98.9	81.3
14	0.83 (0.79, 0.86)	19.9	0.67	86.5	78.9	24.3	98.7	79.5
15	0.82 (0.79, 0.86)	20.1	0.65	76.1	88.8	34.8	97.9	87.9
16	0.85 (0.81, 0.89)	20.9	0.70	82.9	87.3	27.3	98.9	87.0
17	0.86 (0.82, 0.90)	22.2	0.74	89.7	83.2	17.3	99.5	83.4
18	0.84 (0.79, 0.89)	22.6	0.69	83.8	84.3	17.7	99.2	84.3
19	0.77 (0.58, 0.97)	23.7	0.74	80.0	74.8	7.0	99.4	74.9
10-14	0.77 (0.75, 0.78)	18.4	0.54	82.1	71.6	19.0	98.0	72.4
15-19	0.82 (0.80, 0.84)	21.9	0.64	84.4	79.8	18.3	99.0	80.0
Females
10	0.77 (0.73, 0.82)	17.3	0.55	82.2	73.1	17.0	98.4	73.6
11	0.81 (0.77, 0.85)	17.2	0.64	76.1	86.7	29.2	98.1	85.9
12	0.84 (0.79, 0.89)	17.9	0.69	79.8	88.8	26.2	98.9	88.4
13	0.85 (0.81, 0.89)	18.9	0.71	84.6	85.6	21.9	99.1	85.5
14	0.86 (0.82, 0.91)	19.6	0.73	87.0	85.6	17.0	99.5	85.6
15	0.85 (0.79, 0.91)	19.8	0.70	81.4	88.9	14.9	99.5	88.8
16	0.82 (0.75, 0.89)	20.2	0.66	73.2	90.4	15.6	99.3	90.0
17	0.91 (0.83, 0.98)	20.0	0.82	88.9	93.1	13.2	99.9	93.0
18	0.84 (0.74, 0.93)	20.7	0.67	78.9	88.1	7.7	99.7	88.0
19	0.93 (0.90, 0.95)	20.7	0.85	1.00	85.2	11.4	100.0	85.5
10-14	0.79 (0.77, 0.81)	18.3	0.58	80.0	77.9	16.3	98.6	77.9
15-19	0.84 (0.80, 0.88)	20.2	0.68	78.4	89.8	12.4	99.6	89.6