Thanks for all the suggestions @SteveDenham. I'll look into it and read some more! ... View more

Many thanks for the response @SteveDenham  ... View more

Mediation involves intermediary variables and the response variables in RRR could be considered as intermediary and so I felt doing a mediation analysis could be a duplication, but I needed clarification of the eventual relationship with the outcome of interest as explained above. Similarly for method=pcr as well. Thanks ... View more

Thanks for your response @PaigeMiller  I beg to differ though! The question was re-titled, but it has everything to do with RRR. I wondered whether the methodology as we have it from RRR creates factors which can have independent and direct associations with the  outcome of interest or whether any eventual associations with the outcome of interest will always be indirect?   I also didn't think I could do mediation analysis with the derived factors for the same outcome, based on the methodology of RRR.   Thanks ... View more

Thanks @ChrisNZ. I'm not sure I understand your question, but I used proc pls method=rrr. ... View more

If I remove line 1413 together with the AT option I still get the same error message ... View more

1409 ODS graphics on; 1410 PROC logistic data= work;*Final model; 1411 class Primiparity(ref="Yes") Health (ref="2") bsex (ref="0")/param=ref; 1412 MODEL LGAc (event='1') = Health Primiparity bsex Health*bsex/noor; 1413 effectplot / at(bSex=all) noobs; 1414 effectplot slicefit(sliceby=bSex plotby=Health)/ noobs; 1415 RUN; NOTE: PROC LOGISTIC is modeling the probability that LGAc='1'. NOTE: Convergence criterion (GCONV=1E-8) satisfied. NOTE: Under full-rank parameterizations, Type 3 effect tests are replaced by joint tests. The joint test for an effect is a test that all the parameters associated with that effect are zero. Such joint tests might not be equivalent to Type 3 effect tests under GLM parameterization. ERROR: The specified plot type does not support the variable configuration. NOTE: The SAS System stopped processing this step because of errors. NOTE: There were 283 observations read from the data set TARGET.PATTERN_MORPH_LOG. NOTE: PROCEDURE LOGISTIC used (Total process time): real time 1.07 seconds cpu time 0.73 seconds ... View more

Is this any better? Thanks ... View more

NOTE: PROC LOGISTIC is modeling the probability that LGAc='1'. NOTE: Convergence criterion (GCONV=1E-8) satisfied. NOTE: Under full-rank parameterizations, Type 3 effect tests are replaced by joint tests. The joint test for an effect is a test that all the parameters associated with that effect are zero. Such joint tests might not be equivalent to Type 3 effect tests under GLM parameterization. ERROR: The specified plot type does not support the variable configuration. NOTE: The SAS System stopped processing this step because of errors. NOTE: There were 283 observations read from the data set TARGET.PATTERN_MORPH_LOG. NOTE: PROCEDURE LOGISTIC used (Total process time): real time 1.07 seconds cpu time 0.73 seconds ... View more

So I rerun the code again with interaction term as discussed and this is the log; NOTE: PROC LOGISTIC is modeling the probability that LGAc='1'. NOTE: Convergence criterion (GCONV=1E-8) satisfied. NOTE: Under full-rank parameterizations, Type 3 effect tests are replaced by joint tests. The joint test for an effect is a test that all the parameters associated with that effect are zero. Such joint tests might not be equivalent to Type 3 effect tests under GLM parameterization. ERROR: The specified plot type does not support the variable configuration. NOTE: The SAS System stopped processing this step because of errors. NOTE: There were 283 observations read from the data set TARGET.PATTERN_MORPH_LOG. NOTE: PROCEDURE LOGISTIC used (Total process time): real time 1.07 seconds cpu time 0.73 seconds ... View more

Thanks @PaigeMiller! It appears to have run without a problem. I'm not sure why I thought I had to create the variable first. I did run the same data with proc reg earlier on and this was the log: 1406 PROC reg data= work;*Final model; 1407 MODEL StdTotalsubcut_b_cond = StdHealth Primiparity bsex Health*bsex; - 22 200 NOTE: The previous statement has been deleted. ERROR 22-322: Syntax error, expecting one of the following: a name, ;, -, /, :, _ALL_, _CHARACTER_, _CHAR_, _NUMERIC_, {. ERROR 200-322: The symbol is not recognized and will be ignored. 1408 RUN; WARNING: No variables specified for an SSCP matrix. Execution terminating. NOTE: PROCEDURE REG used (Total process time): real time 0.00 seconds cpu time 0.00 seconds ... View more