Hi SAS users,
My current code only shows the adjust p-values with vis = 30 as the reference group. If I want to use vis = 20 as the reference group, how should I modify the code?
PROC SORT DATA = test ;
BY VIS;
RUN;
PROC GENMOD DATA = test;
CLASS VAL SUBNUM VIS (REF = "20" ) ;
MODEL VAL = VIS/DIST = BIN ;
REPEATED SUBJECT = SUBNUM/CORR = UNSTR CORRW;
LSMEANS VIS/PDIFF ADJUST = DUNNETT;
RUN;
Hi @superbibi,
I think the result from
LSMEANS VIS/PDIFF=control('20') ADJUST = DUNNETT;
looks promising (cf. documentation of the PDIFF option).
Hi @superbibi,
I think the result from
LSMEANS VIS/PDIFF=control('20') ADJUST = DUNNETT;
looks promising (cf. documentation of the PDIFF option).
Is there a way to calculate the overall p-value for vis using proc genmod? In the attached code, I got only the p-values for each paired comparison.
Do you mean the Wald chi-square test?
Wald Statistics For Type 3 GEE Analysis Chi- Source DF Square Pr > ChiSq VIS 7 37.94 <.0001
To obtain this, you need to add the TYPE3 and WALD options to the MODEL statement:
MODEL VAL = VIS/DIST = BIN type3 wald;
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