Converts birth measurements to intergrowth z-scores/centiles

Converts birth measurements to INTERGROWTH z-scores/centiles (generic)

igb_standardsDS(
  gagebrth = gagebrth,
  z = z,
  p = p,
  val = val,
  var = var,
  sex = sex,
  fun = fun
)

Arguments

gagebrth

the name of the "gestational age at birth in days" variable.

z

z-score(s) to convert (must be between 0 and 1). Default value is 0. This value is used only if fun is set to "igb_zscore2value".

p

centile(s) to convert (must be between 0 and 100). Default value is p=50. This value is used only if fun is set to "igb_centile2value".

val

the name of the anthropometric variable to convert.

var

the name of the measurement to convert ("lencm", "wtkg", "hcircm", "wlr")

sex

the name of the sex factor variable. The variable should be coded as Male/Female. If it is coded differently (e.g. 0/1), then you can use the ds.recodeValues function to recode the categories to Male/Female before the use of ds.igb_standards

fun

the name of the function to be used. This can be one of: "igb_centile2value", "igb_zscore2value", "igb_value2zscore" (default), "igb_value2centile".

Value

assigns the converted measurement as a new object on the server-side

Note

For gestational ages between 24 and 33 weeks, the INTERGROWTH very early preterm standard is used.

Author

Demetris Avraam for DataSHIELD Development Team