I was wrong when I said that you could use the TRANSFORM= option in PROC PHREG.
However, you can create an output data set from any table or graph that SAS produces. Please see
Thus the easiest way to accomplish your task is to write the cumulative hazard values to a data set and then simply tell PROC SGPLOT to use a log axis, like this:
proc phreg data=kidney plots=cumhaz ;
model time*cens(0)=age / rl ;
ods output CumHazPlot=CHPlot;
run;
title "log10(cumulative hazard) for Age=49.39";
proc sgplot data=CHPlot;
where CumHaz>0;
step y=CumHaz x=Time;
yaxis type=log logbase=10 logstyle=logexpand;
run;
Alternatively, you can use the DATA step to log-transform the cumulative hazard, and then use a regular (linear) scale on the axis:
data logCumHaz;
set CHPlot;
if cumHaz=0 then logCumHaz=.;
else logCumHaz= log10(cumHaz);
label logCumHaz = "log10(cumulative hazard)";
run;
title "log10(cumulative hazard) for Age=49.39";
proc sgplot data=logCumHaz;
step y=logCumHaz x=Time;
run;
