Convert INTERGROWTH z-scores/centiles to fetal ultrasound measurements (generic)

Source: R/standard_igfet.R

Convert INTERGROWTH z-scores/centiles to fetal ultrasound measurements (generic)

igfet_zscore2value(gagedays, z = 0, var = c("hccm", "bpdcm", "ofdcm",
  "accm", "flcm"))

igfet_centile2value(gagedays, p = 50, var = c("hccm", "bpdcm", "ofdcm",
  "accm", "flcm"))

Arguments

gagedays

gestational age in days
z

z-score(s) to convert
var

the name of the measurement to convert ("hccm", "bpdcm", "ofdcm", "accm", "flcm")
p

centile(s) to convert (must be between 0 and 100)

References

International standards for fetal growth based on serial ultrasound measurements: the Fetal Growth Longitudinal Study of the INTERGROWTH-21st Project Papageorghiou, Aris T et al. The Lancet, Volume 384, Issue 9946, 869-879

Examples

# get value for median head circumference for child at 100 gestational days
igfet_centile2value(100, 50, var = "hccm")
#> [1] 10.14404