topic How I could get the correlation between the mortality and the clusters? in SAS Procedures

How I could get the correlation between the mortality and the clusters?

Ana — Thu, 29 Oct 2015 11:32:45 GMT

Dear All,

I'm new to this area and I need your help!

In order to study the relation between mortality [ 0 (survived) or 1 (died)] that 68 strains produced and the test (I to X), I have applied an univariable logistic regression analysis with proc genmod. So far so good.

proc genmod data=data descend;
   class Strain Test;
   model Mortality= Strain Test/ dist= binomial link= logit type3 noint aggregate;
   lsmeans Strain Test/diff;
run;

Now, I need help with the following. I want to assess the associations between the mortality with the ERIC-PCR results (clusters for each strain, from 1 to 7) and one sequence type (ST) of the strains (binomial variable; 0 = absence and 1=presence).

How I could get the correlation between the mortality and the clusters?

To the association between mortality and the sequence type (ST), I have attempted using the next procedures, and I have achieved the same result, but I am not sure if it is right:

proc genmod data=data descend;
   class ST;
   model Mortality= ST / dist= binomial link= logit type3 noint aggregate;
   lsmeans ST /diff;
run;

proc anova data=data plots(maxpoints=none);
   class ST82;
   model porcent*=St82;
   means ST82/ Bon;
run;
* porcent = number of subjects dead/number of subjects used per strain (in porcent)

proc ttest data=data;
   class ST;
   var porcent;
run;

I would appreciate some help with the correct syntax for this question...

Thanks in advance!

Ana

Re: How I could get the correlation between the mortality and the clusters?

pearsoninst — Tue, 03 Nov 2015 08:21:29 GMT

Use

proc genmod data=data CORR descend;

Re: How I could get the correlation between the mortality and the clusters?

Ana — Tue, 03 Nov 2015 14:06:39 GMT

Dear pearsoninst,

Thank you very much for your help.

Unfortunately, CORR is considered a syntax error and therefore it is ignored.

Do you have any other suggestions or idea?

Re: How I could get the correlation between the mortality and the clusters?

pearsoninst — Tue, 03 Nov 2015 14:33:35 GMT

I am very sorry , i did not realize you are are using genmod . I i thought it is Proc REG . Corr works for that ..I have not idea on Genmod. Very sorry

Re: How I could get the correlation between the mortality and the clusters?

Ana — Tue, 03 Nov 2015 14:42:28 GMT

Thank you all the same!
If you know, how I could get the correlation between the mortality (binary variable) and the clusters with the Proc REG is also well received.

Re: How I could get the correlation between the mortality and the clusters?

pearsoninst — Wed, 04 Nov 2015 12:05:40 GMT

proc surveyreg data=newdata total=10;
   cluster Clustervariable;
   model yvariable=xvariable;
run;

and to find only the correlation use CORR Procedure.

Re: How I could get the correlation between the mortality and the clusters?

Ana — Wed, 04 Nov 2015 13:32:48 GMT

Thank you for your suggestion dear pearsoninst!

I don't know the proc surveyreg but I will prove it!
About proc CORR, what would be the best correlation coefficient to analyze my data?

Thank you in advance!