https://communities.sas.com/t5/Statistical-Procedures/How-to-analyze-the-continuous-covariate-between-two-groups-which/m-p/826634#M40943 <P>Dear all,<BR />We plan to conduct a research for exploring the risk factors for a cardiovascular disease by a case-control study.<BR />The covariates are expected to be balanced between case and control groups by the Propensity Score Matching.<BR />We will compare the difference of covariates between case and control groups before and after matched by PSM. <BR />We could compare them by paired samples t-test.</P> <P>However, if we matched the samples between case and control groups as the ratio 1:2 or 1:3 or 1:4，how to compared the difference of covariates before and after matched by PSM ?<BR />If the covariates are categorical variable, we might analyze them by Conditional Logistic Regression Analysis.</P> <P>But if the covariates are continuous variable, which method could we conduct to analyze them between case and control groups（that is , the ratio is 1:2 or 1:3 or 1:4 between case and control groups）？</P> <P>Thanks !</P> <P>&nbsp;</P> <P>Dennis</P> Tue, 02 Aug 2022 14:11:26 GMT Dennisky 2022-08-02T14:11:26Z https://communities.sas.com/t5/Statistical-Procedures/How-to-analyze-the-continuous-covariate-between-two-groups-which/m-p/826634#M40943 <P>Dear all,<BR />We plan to conduct a research for exploring the risk factors for a cardiovascular disease by a case-control study.<BR />The covariates are expected to be balanced between case and control groups by the Propensity Score Matching.<BR />We will compare the difference of covariates between case and control groups before and after matched by PSM. <BR />We could compare them by paired samples t-test.</P> <P>However, if we matched the samples between case and control groups as the ratio 1:2 or 1:3 or 1:4，how to compared the difference of covariates before and after matched by PSM ?<BR />If the covariates are categorical variable, we might analyze them by Conditional Logistic Regression Analysis.</P> <P>But if the covariates are continuous variable, which method could we conduct to analyze them between case and control groups（that is , the ratio is 1:2 or 1:3 or 1:4 between case and control groups）？</P> <P>Thanks !</P> <P>&nbsp;</P> <P>Dennis</P> Tue, 02 Aug 2022 14:11:26 GMT https://communities.sas.com/t5/Statistical-Procedures/How-to-analyze-the-continuous-covariate-between-two-groups-which/m-p/826634#M40943 Dennisky 2022-08-02T14:11:26Z