Programming the statistical procedures from SAS

Paired T-test & ANCOVA

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Paired T-test & ANCOVA

Using the dataset shown below, I have calculated means and changes from baseline using the following codes:

sas1.png

 

 

proc means data = asas.ttest

       N MEAN STDERR STD;

       var RESULT;

       class TRT PARAMCD VISIT;

       title 'Mean BMI and HR';

run;

sas2.png

 

proc means data = asas.ttest

       N MEAN STDERR STD;

       var CHG;

       class TRT PARAMCD VISIT;

       title 'Change from Baseline of BMI and HR';

run;

sas3.png

 

I am now trying to perform Paired t-tests for Changes from Baseline (CHG) at two different time points (Week 6 & Week12), for the two different parameters (BMI & HR) for the two separate treatment groups (A & B) independently; That is, I want to analyze the effects (change from baseline) of the two treatments independently.

Secondly, I am trying to perform an ANCOVA to compare the changes from baseline between the two treatment groups, at the two time points, for the two different parameters, with the Baseline value as the covariate; That is, I want to compare the treatments.

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