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lipids
2007 Jun 05
1
lme vs. SAS proc mixed. Point estimates and SEs are the same, DFs are different
...with output from R. The point estimates and the SEs are the same, however the DFs and the p values are different. I am clearly doing something wrong in my R code. I would appreciate any suggestions of how I can change the R code to get the same DFs as are provided by SAS.
SAS code:
proc mixed data=lipids2;
model ldl=jweek/solution;
random int jweek/type=un subject=patient;
where lastvisit ge 4;
run;
SAS output:
Solution for Fixed Effects
Standard
Effect Estimate Error DF t Value Pr > |t|
Intercept 113.48 7.4539...