Creating Graphics for Multiple Variables

[richaemi]

I need to create a graph showing values over time by treatment group. Say I am looking at Hemoglobin as my variable. If I have a variable for each Hemoglobin at Baseline, Hemoglobin at 24hrs, Hemoglobin at 48 hrs, and Hemoglobin at 72hrs, and a variable for Treatment ID (Treatment A or Treatment B), is it possible to graph all of these values over time by Treatment ID in SAS?

Thanks!

[ballardw]

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@richaemi wrote:

I need to create a graph showing values over time by treatment group. Say I am looking at Hemoglobin as my variable. If I have a variable for each Hemoglobin at Baseline, Hemoglobin at 24hrs, Hemoglobin at 48 hrs, and Hemoglobin at 72hrs, and a variable for Treatment ID (Treatment A or Treatment B), is it possible to graph all of these values over time by Treatment ID in SAS?

Thanks!

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Yes.

X axis value as the timepoint, Y axis variable as the measurement, Group by treatment. A number of different plot types may work.

data example;
   input time meas trt;
datalines;
0    22   1
24   21   1
48   24   1
72   25   1
0    15   2
24   15   2
48   18   2
72   17   2
0    8    3
24   9    3
48   10   3
72   11   3
0    24   1
24   24   1
48   25   1
72   27   1
0   18    2
24  17    2
48  18    2
72  19    2
0   10    3
24  11    3
48  11    3
72  13    3
;
run;

proc sgplot data=example;
   /* values*/
   scatter x=time y=meas/group=trt;
   /* fit straight line through with confidence bands for the mean*/
   reg x=time y=meas/group=trt clm;
run;

If you want to connect points that would be a series plot but you need more information to avoid having the right end of the graph try to connect back to the left end.