ds.igb_standards.RdConverts birth measurements to INTERGROWTH z-scores/centiles (generic)
ds.igb_standards(
gagebrth = NULL,
z = 0,
p = 50,
val = NULL,
var = NULL,
sex = NULL,
fun = "igb_value2zscore",
newobj = NULL,
datasources = NULL
)the name of the "gestational age at birth in days" variable.
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".
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".
the name of the anthropometric variable to convert.
the name of the measurement to convert ("lencm", "wtkg", "hcircm", "wlr").
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.
the name of the function to be used. This can be one of: "igb_centile2value", "igb_zscore2value", "igb_value2zscore" (default), "igb_value2centile".
a character string that provides the name for the output variable
that is stored on the data servers. Default name is set to igb.newobj.
a list of DSConnection-class objects obtained after login.
If the datasources argument is not specified the default set of connections will be
used: see datashield.connections_default.
assigns the converted measurement as a new object on the server-side
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.