SAS PROC GLM with group effect [General Statistics]
Hello El Maestro
Many thanks for your input.
I will think about the practical significance about treatment by group interaction and share my thoughts.
Despite dealing quite well with phoenix, I really have difficulties to work on SAS. I use as reference the code that Helmut published in the White Paper to compare Phoenix and SAS procedures according to EMA Q&A position.
The other dataset I've been trying to have an output from SAS with group effect gave me another phenomenon:
SAS code
This time the output does not show values for the LSmeans for R and T as well as for the respective 90% confidence Limits. However, in the Least Squares Means for Effect form table, the Difference Between Means were calculated as well as the 90% Confidence Limits for the LSMean(i)-LSMean(j):
Difference Between Means = 0.046662
LSMean(i)-LSMean(j) = -0.026738 to 0.120061
Am I doing something wrong again?
Phoenix output is below:
Least squares means for Reference = 4.60219 (SE = 0.0737145)
Least squares means for Test = 4.64885 (SE=0.0737145)
Difference Between Means = -0.0466616
Lower CI = -0.1201 and Upper CI = 0.02674
Difference between means for SAS is positive and for Phoenix is negative and Confidence Limits are the opposite.
As the approved Statistical Analysis Plan refers that this SAS PROC model will be used, how can I solve this problem?
I deeply thanks in advance all the help and input.
Regards
Silva
Edit: Full quote removed. Please delete everything from the text of the original poster which is not necessary in understanding your answer; see also this post! [Helmut]
Many thanks for your input.
I will think about the practical significance about treatment by group interaction and share my thoughts.
Despite dealing quite well with phoenix, I really have difficulties to work on SAS. I use as reference the code that Helmut published in the White Paper to compare Phoenix and SAS procedures according to EMA Q&A position.
The other dataset I've been trying to have an output from SAS with group effect gave me another phenomenon:
SAS code
proc glm data=work._test2;
class subject form period sequence group;
model lnCMAX= group sequence form form*group period subject (sequence);
estimate "test-ref" form -1 +1;
test h=sequence e=subject(sequence)
lsmeans form / adjust=t pdiff=control("R") CL alpha=0.10;
run;
This time the output does not show values for the LSmeans for R and T as well as for the respective 90% confidence Limits. However, in the Least Squares Means for Effect form table, the Difference Between Means were calculated as well as the 90% Confidence Limits for the LSMean(i)-LSMean(j):
Difference Between Means = 0.046662
LSMean(i)-LSMean(j) = -0.026738 to 0.120061
Am I doing something wrong again?
Phoenix output is below:
Least squares means for Reference = 4.60219 (SE = 0.0737145)
Least squares means for Test = 4.64885 (SE=0.0737145)
Difference Between Means = -0.0466616
Lower CI = -0.1201 and Upper CI = 0.02674
Difference between means for SAS is positive and for Phoenix is negative and Confidence Limits are the opposite.
As the approved Statistical Analysis Plan refers that this SAS PROC model will be used, how can I solve this problem?
I deeply thanks in advance all the help and input.
Regards
Silva
Edit: Full quote removed. Please delete everything from the text of the original poster which is not necessary in understanding your answer; see also this post! [Helmut]
Complete thread:
- SAS PROC GLM with group effect Silva 2014-05-19 10:57 [General Statistics]
- SAS PROC GLM with group effect ElMaestro 2014-05-19 11:51
- SAS PROC GLM with group effectSilva 2014-05-22 12:01
- SAS PROC GLM with group effect d_labes 2014-05-22 14:11
- SAS PROC GLM with group effect Silva 2014-05-22 16:54
- SAS PROC GLM with group effect d_labes 2014-05-22 14:11
- SAS PROC GLM with group effectSilva 2014-05-22 12:01
- SAS PROC GLM with group effect d_labes 2014-05-19 13:02
- SAS PROC GLM with group effect Silva 2014-05-23 12:12
- SAS PROC GLM with group effect ElMaestro 2014-05-23 12:31
- Acceptability of software Helmut 2014-05-23 12:47
- Acceptability of software Lucas 2014-11-14 12:21
- Acceptability of software Helmut 2014-11-14 14:11
- Acceptability of software Lucas 2014-11-14 12:21
- SAS PROC GLM with group effect ElMaestro 2014-05-19 11:51