Hello SAS experts, I'm using a very large dataset of births that I want to separate into either rural or urban zip codes. There are about 500 zip codes total and are all in my data set under the variable Res_Zip. I believe I need to make two new variables, i.e. rural zip and urban zip and tell sas which codes go where? However, I also need to apply some exclusion criteria, for example, I want to exclude mothers with gestational diabetes and multiple births. Not sure where to start. Thanks, Kris
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