How do I get proc lifetest to output a graph where I want to start at a time different of zero
You can start at a different time by specifing the axes options.
Below is a modification of a Proc Lifetest example found on UCLA's website (halfway down the page):
http://www.ats.ucla.edu/stat/sas/examples/asa/asa2_may_2006.htm
I changed the x-axis to start at 10 rather than 0
proc lifetest data=hmohiv noprint;
time time *censor(0);
survival out=Out1 confband=hw;
run;
symbol i=join v=circle r=5 ;
axis1 order = (0 to 1 by .2) label=(a=90 "Survival Probability") minor=none;
axis2 order = (10 to 60 by 10) label = ("Survival Time (Months)") minor=none;
legend label=none value=(h=2 font=swiss 'Kaplan-Meyer' 'HW lower' 'HW upper'
'Pointwise lower' 'Pointwise upper')
position=(top right inside) mode=share cborder=black;
proc gplot data = out1;
plot (survival hw_lcl hw_ucl sdf_lcl sdf_ucl)*time
/legend=legend1 vaxis=axis1 haxis=axis2 overlay;
run;
quit;
You can start at a different time by specifing the axes options.
Below is a modification of a Proc Lifetest example found on UCLA's website (halfway down the page):
http://www.ats.ucla.edu/stat/sas/examples/asa/asa2_may_2006.htm
I changed the x-axis to start at 10 rather than 0
proc lifetest data=hmohiv noprint;
time time *censor(0);
survival out=Out1 confband=hw;
run;
symbol i=join v=circle r=5 ;
axis1 order = (0 to 1 by .2) label=(a=90 "Survival Probability") minor=none;
axis2 order = (10 to 60 by 10) label = ("Survival Time (Months)") minor=none;
legend label=none value=(h=2 font=swiss 'Kaplan-Meyer' 'HW lower' 'HW upper'
'Pointwise lower' 'Pointwise upper')
position=(top right inside) mode=share cborder=black;
proc gplot data = out1;
plot (survival hw_lcl hw_ucl sdf_lcl sdf_ucl)*time
/legend=legend1 vaxis=axis1 haxis=axis2 overlay;
run;
quit;
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