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I'm trying to get the 'number at risk' (n in my code below) using xaxistable on my sgplot figure. However, I was expecting the 'n' to be aligned with the x axis timepoints (0, 6, 12, 18, 24, 30, and 36). Instead, the n is showing up at every timepoint where there is an actual change. So there are many more 'n' on the figure than needed - and not the ones I want. Does anyone know how to get the 'n' for your predefined x axis timepoints? My code is below. Figure is attached.
proc sgplot data=b11 ;
step x=fuptime y=s/group=trivex name='s' ;
xaxistable n / x=fuptime class=trivex location=outside colorgroup=trivex separator
;
styleattrs
datacontrastcolors=(black gray)
datalinepatterns=(solid);
format trivex trivex.;
yaxis values=(0.5 to 1.0 by 0.1);
xaxis values=(0 to 36 by 6);
yaxis label="Proportion of Patients with No Ulcer Recurrence (%)";
label fuptime=Length of Follow-Up (Months);
label trivex=Phlebectomy;
keylegend 's';
run;
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You could edit your dataset to delete n content when timepoint is not in your list.
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Yes, I would recommend editing the data. Use timelist option in proc lifetest to limit data.
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Suggestions by Reeza and Rodriguez are in the right direction. See the SAS 9.4 (last) example in the Survival Plot article. While the Step plot uses X=TIME, the xaxistable uses the optional X=TATRISK. See the data set shown in the article. TATRISK has non-missing values only at 0, 500, 1000 and so on, so the ATRISK values are shown only where TATRISK is non-missing. Full program is provided in a link at the bottom of the article.
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Thanks everyone! Huge help.
All the best,
Corey