Birth weight z scores for gestational age using Canadian reference charts

[Shiraz El Adam]

Hello Statalist,

I am new to Stata and this is my first post, so I hope you can help me.
I am trying to find the syntax to create small for gestational age birth outcomes (a sex-specific birth weight below the 10th percentile for gestational age, according to Canadian reference values). To do so I need to create z scores using my the sex specific Canadian reference charts by gestational age.
I realize the 'zanthro' command does that, but uses other imbedded reference charts by the WHO and the CDC.
Is there a way to use the Canadian reference chart instead with this command or any other syntax that you recommend?

Syntax

egen [type] newvar = zanthro(varname,chart,version) [if] [in], xvar(
varname) gender(varname) gencode(male=code, female=code)
[ageunit(unit) gestage(varname) nocutoff]

egen [type] newvar = zbmicat(varname) [if] [in], xvar(varname)
gender(varname) gencode(male=code, female=code)
[ageunit(unit)]


Thanks for your help,

Shiraz

[Roman Mostazir]

I don't think `zanthro' supports Canadian reference data. According to the help file, WHO, CDC-USA and British-UK reference data are supported.

[Phil Bromiley]

You'll increase your chances of a helpful answer by following the FAQ on asking questions - provide Stata code in code delimiters, readable Stata output, and sample data using dataex.

Roman appears to understand zanthro, but most of us probably have no idea what you're talking about. If you can express your problem precisely in statistical terms and make a real effort to solve it yourself first, folks on this listserve will be happy to help.