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  • Test post: Comparability score analysis - which weight to use

    I have received an example of comparability score analysis for SAS (see example below) and I need to reanalyze my data using this method. However, I am using Stata, version 12.0 for Mac, and I have never used weights, this new score method or SAS before. I have a simple logistic regression model, which I should weight by the comparability score (derived by certain criteria described in Vintzileos et al. The use of a comparability scoring system in reporting observational studies. Am J Obstet Gynecol. 2014; 210:112-116.).

    Can anyone help which weight in Stata would be the correct one to use in order to do the weighting in a similar way than it is done in the SAS example?

    Best regards,
    Johanna
    ----------------------------------------------------

    SAS example:

    DATA work.TWO;
    input EXP OUT WT;

    datalines;
    1 1 182
    1 2 478
    2 1 87
    2 2 319
    ;
    run;


    DATA work.TWO;
    set work.TWO;

    *WT is the weight from the comparability score;

    IF (EXP = 1) then WT = WT;
    else IF (EXP = 2) then WT = WT*6/12;

    run;

    PROC FREQ DATA = work.TWO;
    weight WT;
    table EXP*OUT / nocol nopercent cmh;
    exact PCHI OR;
    run;
    ---------------------------------------------------------------------
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