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  • 1.  Case control matching

    Posted Fri July 21, 2023 02:56 PM

    Hello,

    I am wondering if anyone can help me problem solve why my case control matching is not working. I have tried with dummy data and every time I fail to get any matches. I have attached the dummy dataset and the output I get, along with a screenshot of my configuration.

    Any assistance would be greatly appreciated.

    Gavin



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    Gavin Roffe
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    Attachment(s)

    sav
    Test case control matching input.sav   869 B 1 version


  • 2.  RE: Case control matching

    Posted Fri July 21, 2023 04:57 PM
    Well, you have specified a zero tolerance for matches, so only controls with the exact matching variable(s) are eligible for pairing.  You only show ten cases, 5/5 so I expect that this not like your real data.

    The biggest problem I see, though, is that your grouping variable is coded incorrectly, so there are no cases to match.  From the help...

    Group Indicator Specify the variable that distinguishes demander and supplier cases. A value of 1 indicates a demander case, and a value of 0 indicates a supplier. Any other values, including missing, will cause the case to be ignored.

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    Original Message


  • 3.  RE: Case control matching

    Posted Wed July 26, 2023 09:56 AM

    Super helpful thank you, managed to get it sorted now thanks to your help. Much appreciated.



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    Gavin Roffe
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    Original Message