Here's one way to do it with SAS/Graph Proc Gchart, with a partial dataset I created (I'll leave it to the ODS Graphics experts to show how to do it with Proc SGplot) 🙂
data x;
infile datalines pad truncover dlm=':';
length trt01 $3 timepoint $15 grade $10;
input trt01 timepoint grade percent;
datalines;
a:day 1, 30 min:mild:34
a:day 1, 30 min:moderate:2
a:day 1, 30 min:severe:0
b:day 1, 30 min:mild:64
b:day 1, 30 min:moderate:0
b:day 1, 30 min:severe:0
c:day 1, 30 min:mild:15.0
c:day 1, 30 min:moderate:0
c:day 1, 30 min:severe:0
a:day 1, PM:mild:62
a:day 1, PM:moderate:14
a:day 1, PM:severe:0
b:day 1, PM:mild:45
b:day 1, PM:moderate:37
b:day 1, PM:severe:0
c:day 1, PM:mild:15.0
c:day 1, PM:moderate:5
c:day 1, PM:severe:0
a:day 2:mild:78
a:day 2:moderate:11
a:day 2:severe:4
b:day 2:mild:27
b:day 2:moderate:30
b:day 2:severe:0
c:day 2:mild:15.0
c:day 2:moderate:5
c:day 2:severe:0
run;
axis1 minor=none label=(angle=90 'Percentage of Subjects with Reactions');
axis2 label=none value=none;
axis3 label=none;
legend1 label=("GRADE") shape=bar(.15in,.15in) frame;
proc gchart data=x;
vbar trt01 / sumvar=percent subgroup=grade space=0
group=timepoint maxis=axis2 gaxis=axis3 legend=legend1
raxis=axis1;
run;
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