Diagnostic Concordance between Random Upper Arm Circumference and Mid Upper Arm Circumference Measurements among Children Aged 6–59 Months in South Ethiopia: A Community-Based Cross-Sectional Study

Table 6

Validity tests on RUAC measurements at WHO cutoff (<12.5 cm) from Lanfro District, SNNPR, Southern Ethiopia, 2016 (n = 819).

Indicators		Sensitivity % (95% CI)	Specificity % (95% CI)	Positive likelihood ratio (95% CI)	Negative likelihood ratio (95% CI)	Youden index	PPV % (95% CI)	NPV % (95% CI)
Nutritional status	SAM	72 (55.8–84.9)	99 (98.2–99.6)	81.6 (37.9–175.7)	0.28 (0.18–0.48)	0.71	77.4 (60.2–87.6)	98 (97.8–99.4)
	MAM	76.8 (69.8–82.6)	95.8 (94–97.2)	18.6 (12.7–27.2)	0.24 (0.18–0.32)	0.73	82.4 (75.5–87.6)	94.3 (92.3–95.8)
	GAM	81 (75.4–86.1)	96.9 (95.2–98.2)	26.3 (16.8–41.2)	0.19 (0.14–0.25)	0.78	89.6 (84.4–93.3)	94 (91.9–95.5)
Age in months	6–23	79.9 (70.1–80.1)	91.6 (83.6–95.8)	9.9 (4.8–20.4)	0.17 (0.09–0.3)	0.75	88 (77.8–0.94)	88 (79–93.5)
	12–23	76.7 (66.7–84.4)	95 (91.5–98)	19 (8.6–42.2)	0.24 (0.16–0.35)	0.72	91 (81.9–96)	87.7 (81.8–91.9)
	24–35	93 (78.6–98)	99 (95.8–99.8)	125 (17.7–883.4)	0.07 (0.02–0.26)	0.92	96.5 (82.5–99.4)	98 (94.7–99.5)
	36–47	70.6 (46.8–86.7)	97.8 (93.7–99)	32 (10–102.8)	0.3 (0.14–0.63)	0.68	80 (54.8–92.9)	96.4 (91.8–98.4)
	48–59	85.7 (48.7–97.4)	98.5 (93.7–99.5)	48 (11.8–197.7)	0.15 (0.02–0.89)	0.84	75 (40.9–92.8)	98 (94.7–99.5)
	Combined	81.2 (75.4–86.1)	96.9 (95.2–98.2)	26.3 (16.8–41.2)	0.19 (0.14–0.25)	0.78	89.6 (84.4–93.3)	94 (91.9–95.5)
Sex	Female	81 (72.2–87.5)	97 (94.5–98.6)	28.9 (14.52–57.7)	0.20 (0.13–0.29)	0.78	91 (83.3–95.4)	93 (90.2–95.8)
	Male	81.5 (72.9–87.8)	97 (94.1–98.1)	24.5 (13.5–44.1)	0.19 (0.1–0.28)	0.79	88 (80.4–93.4)	94.4 (10.6–26.5)
	Combined	81.2 (75.4–86.1)	96.9 (95.2–98.2)	26.3 (16.8–41.2)	0.19 (0.14–0.25)	0.78	89.6 (84.4–93.3)	94 (91.9–95.5)

Youden index = (sensitivity + specificity) – 1. PPV: positive predictive value; NPV: negative predictive value.