igb_centile2value | R Documentation |
Convert birth measurements to INTERGROWTH z-scores/centiles (generic)
igb_centile2value(gagebrth, p = 50, var = "lencm", sex = "Female")
igb_zscore2value(gagebrth, z = 0, var = "lencm", sex = "Female")
gagebrth |
gestational age at birth in days |
p |
centile(s) to convert (must be between 0 and 100) |
var |
the name of the measurement to convert ("lencm", "wtkg", "hcircm", "wlr") |
sex |
"Male" or "Female" |
z |
z-score(s) to convert |
For gestational ages between 24 and 33 weeks, the INTERGROWTH very early preterm standard is used.
International standards for newborn weight, length, and head circumference by gestational age and sex: the Newborn Cross-Sectional Study of the INTERGROWTH-21st Project Villar, José et al. The Lancet, Volume 384, Issue 9946, 857-868
INTERGROWTH-21st very preterm size at birth reference charts. Lancet 2016 doi.org/10.1016/S0140-6736(16) 00384-6. Villar, José et al.
# get 99th centile for Male birth weights across some gestational ages
igb_centile2value(232:300, 99, var = "wtkg", sex = "Male")
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