topic Re: selecting controls in SAS in SAS Programming

selecting controls in SAS

chenyiwen1717 — Thu, 10 May 2018 04:04:44 GMT

Hi,

I have a dataset with cases and potential controls. I would like to select controls by matching age, race, sex and birth weight in 1:10. I used to select controls by creating index, for example, concatenate age|race|sex , and then use proc surveyselect. However, this method cannot satisfy my need since I need to matching birth weight in certain range, such as +/- 50 g. How can I select controls by matching exact variables and variables in a range? Thanks.

Re: selecting controls in SAS

kiranv_ — Thu, 10 May 2018 04:28:23 GMT

please show some input and output data, so that someone cal help you

Re: selecting controls in SAS

Doc_Duke — Thu, 10 May 2018 14:31:23 GMT

Try a Google search for

SAS marching macro

There are a number of macros out there that will do tolerance matching on continuous variables.

Alternatively, you might consider propensity score matching. That often performs better than the simple case-control approach you posited.