Table 3 Data accuracy by each BIV method and age group
Data accuracyTotalAccurateInaccurate
NN%95% CIN%95% CI
Published cut-offs19229,841
Height229,30899.8(99.8–99.8)5330.2(0.2–0.3)
Weight229,22399.7(99.7–99.8)6180.3(0.3–0.3)
WHO BIV rules
0–4 years169,430
Height/Length <-6 or >+6167,20398.7(98.6–98.7)22271.3(1.3–1.4)
Weight <−6 or >+5167,12698.6(98.6–98.7)23041.4(1.3–1.4)
BMI <−5 or >+5165,56097.7(97.6–97.8)38702.3(2.2–2.4)
5–19 years60,411
Height <−6 or >+659,21198.0(97.9–98.1)12002.0(1.9–2.1)
Weight* <−6 or >+532,75932,25798.5(98.3–98.6)4991.5(1.4–1.7)
BMI <−5 or >+558,62097.3(96.9–97.2)17913.0(2.8–3.1)
Invalid inlier rule196,327
zBMI196,24199.9(99.9–99.9)860.04(0.04–0.05)
  • * Only calculated for children <10 years