Hello, i am seeing a note in my result

[dode]

i am using proc surveyreq because my data is survey data (complex survey design) i am using (health and retirement study data).

  The code is below but the problem is when i run the code, i can see a note in the result section that seems that something is wrong,

proc surveyreg data=transform;

class a4dl i4adl gender m4s yearsofedu i4ncome race h7ealth c7over h4osstay c4ondition d4ep l4iving;

model logc4omp= R7COGTOT R7AGEY_B gender m4s yearsofedu i4ncome race h7ealth c7over h4osstay c4ondition d4ep l4iving a4dl i4adl / solution adjrsq;/*putt all of the here cont and cata*/

cluster raehsamp;

strata raestrat;

weight r7wtresp;

output out=surveyreg r=r p=p;

/*proc gplot data= surveyreg; plot r*p;*/

run;

this is what i see, do i ignore it or i need to fix something ?

Note:

The denominator degrees of freedom for the t tests is 52. Matrix X'WX is singular and a generalized inverse was used to solve the normal equations. Estimates are not unique."

[Reeza]

You have too many variables and not enough observations.

Each categorical variable counts as Number of Categories -1 for the number of variables in the model. 

[dode]

so what should I do ? do I accept the results or I should remove some of the variables, or I should change the model? 

[Reeza]

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@dode wrote:

so what should I do ? do I accept the results or I should remove some of the variables, or I should change the model? 

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I don't know, it depends on the context of what you're doing. 

[Reeza]

http://support.sas.com/kb/22/585.html