How to get time-varying coefficient line and CI to stand out over data points in proc phreg zph

dwhitney — Tue, 19 May 2026 17:38:44 GMT

I have the below model, which generates time-varying coefficient plots (fitted penalized B-spline curve) with 95% CI for each variable. Unfortunately, the two key variables that violated the PH assumption have such dense data points that you can't see the moving line and 95% CI (see image below).

I have tried saving the beta coefficients (see first line in model, out=diagnostics) and putting that in proc sgplot. This works great to get the curve, but the SE or CI are not in the diagnostics table, and thus, I can't also plot the 95% CI, which is crucial for this analysis.

Is there any way to reformat the proc phreg image to see the curve and 95% CI? Or perhaps, is there a way to save the 95% CI (or SE) to bring to sgplot?

proc phreg data=a   zph(out=diagnostics transform=identity);
class CSI_count_1yr (ref="0") ins us_reg2 year_surg;
model RCRo_2yr_days*RCRo_2yr_yn(0)=CSI_count_1yr age eci ins us_reg2 year_surg / ties=efron rl;
run;

Re: How to get time-varying coefficient line and CI to stand out over data points in proc phreg zph

Ksharp — Thu, 21 May 2026 08:31:57 GMT

Once you get the output graphic , you could save these data of graphic into a dataset by OUTPUT statement, and Replicate this graphic again latter.

Here is an example:

data Myeloma;
input Time VStatus LogBUN HGB Platelet Age LogWBC Frac
LogPBM Protein SCalc;
label Time='Survival Time'
VStatus='0=Alive 1=Dead';
datalines;
1.25 1 2.2175 9.4 1 67 3.6628 1 1.9542 12 10
1.25 1 1.9395 12.0 1 38 3.9868 1 1.9542 20 18
2.00 1 1.5185 9.8 1 81 3.8751 1 2.0000 2 15
2.00 1 1.7482 11.3 0 75 3.8062 1 1.2553 0 12
2.00 1 1.3010 5.1 0 57 3.7243 1 2.0000 3 9
3.00 1 1.5441 6.7 1 46 4.4757 0 1.9345 12 10
5.00 1 2.2355 10.1 1 50 4.9542 1 1.6628 4 9
5.00 1 1.6812 6.5 1 74 3.7324 0 1.7324 5 9
6.00 1 1.3617 9.0 1 77 3.5441 0 1.4624 1 8
6.00 1 2.1139 10.2 0 70 3.5441 1 1.3617 1 8
6.00 1 1.1139 9.7 1 60 3.5185 1 1.3979 0 10
6.00 1 1.4150 10.4 1 67 3.9294 1 1.6902 0 8
7.00 1 1.9777 9.5 1 48 3.3617 1 1.5682 5 10
7.00 1 1.0414 5.1 0 61 3.7324 1 2.0000 1 10
7.00 1 1.1761 11.4 1 53 3.7243 1 1.5185 1 13
9.00 1 1.7243 8.2 1 55 3.7993 1 1.7404 0 12
11.00 1 1.1139 14.0 1 61 3.8808 1 1.2788 0 10
11.00 1 1.2304 12.0 1 43 3.7709 1 1.1761 1 9
11.00 1 1.3010 13.2 1 65 3.7993 1 1.8195 1 10
11.00 1 1.5682 7.5 1 70 3.8865 0 1.6721 0 12
11.00 1 1.0792 9.6 1 51 3.5051 1 1.9031 0 9
13.00 1 0.7782 5.5 0 60 3.5798 1 1.3979 2 10
14.00 1 1.3979 14.6 1 66 3.7243 1 1.2553 2 10
15.00 1 1.6021 10.6 1 70 3.6902 1 1.4314 0 11
16.00 1 1.3424 9.0 1 48 3.9345 1 2.0000 0 10
16.00 1 1.3222 8.8 1 62 3.6990 1 0.6990 17 10
17.00 1 1.2304 10.0 1 53 3.8808 1 1.4472 4 9
17.00 1 1.5911 11.2 1 68 3.4314 0 1.6128 1 10
18.00 1 1.4472 7.5 1 65 3.5682 0 0.9031 7 8
19.00 1 1.0792 14.4 1 51 3.9191 1 2.0000 6 15
19.00 1 1.2553 7.5 0 60 3.7924 1 1.9294 5 9
24.00 1 1.3010 14.6 1 56 4.0899 1 0.4771 0 9
25.00 1 1.0000 12.4 1 67 3.8195 1 1.6435 0 10
26.00 1 1.2304 11.2 1 49 3.6021 1 2.0000 27 11
32.00 1 1.3222 10.6 1 46 3.6990 1 1.6335 1 9
35.00 1 1.1139 7.0 0 48 3.6532 1 1.1761 4 10
37.00 1 1.6021 11.0 1 63 3.9542 0 1.2041 7 9
41.00 1 1.0000 10.2 1 69 3.4771 1 1.4771 6 10
41.00 1 1.1461 5.0 1 70 3.5185 1 1.3424 0 9
51.00 1 1.5682 7.7 0 74 3.4150 1 1.0414 4 13
52.00 1 1.0000 10.1 1 60 3.8573 1 1.6532 4 10
54.00 1 1.2553 9.0 1 49 3.7243 1 1.6990 2 10
58.00 1 1.2041 12.1 1 42 3.6990 1 1.5798 22 10
66.00 1 1.4472 6.6 1 59 3.7853 1 1.8195 0 9
67.00 1 1.3222 12.8 1 52 3.6435 1 1.0414 1 10
88.00 1 1.1761 10.6 1 47 3.5563 0 1.7559 21 9
89.00 1 1.3222 14.0 1 63 3.6532 1 1.6232 1 9
92.00 1 1.4314 11.0 1 58 4.0755 1 1.4150 4 11
4.00 0 1.9542 10.2 1 59 4.0453 0 0.7782 12 10
4.00 0 1.9243 10.0 1 49 3.9590 0 1.6232 0 13
7.00 0 1.1139 12.4 1 48 3.7993 1 1.8573 0 10
7.00 0 1.5315 10.2 1 81 3.5911 0 1.8808 0 11
8.00 0 1.0792 9.9 1 57 3.8325 1 1.6532 0 8
12.00 0 1.1461 11.6 1 46 3.6435 0 1.1461 0 7
11.00 0 1.6128 14.0 1 60 3.7324 1 1.8451 3 9
12.00 0 1.3979 8.8 1 66 3.8388 1 1.3617 0 9
13.00 0 1.6628 4.9 0 71 3.6435 0 1.7924 0 9
16.00 0 1.1461 13.0 1 55 3.8573 0 0.9031 0 9
19.00 0 1.3222 13.0 1 59 3.7709 1 2.0000 1 10
19.00 0 1.3222 10.8 1 69 3.8808 1 1.5185 0 10
28.00 0 1.2304 7.3 1 82 3.7482 1 1.6721 0 9
41.00 0 1.7559 12.8 1 72 3.7243 1 1.4472 1 9
53.00 0 1.1139 12.0 1 66 3.6128 1 2.0000 1 11
57.00 0 1.2553 12.5 1 66 3.9685 0 1.9542 0 11
77.00 0 1.0792 14.0 1 60 3.6812 0 0.9542 0 12
;

ods output  zphPlot= zphPlot;  /*Save the data for the following plotting*/
proc phreg data=Myeloma zph(out=diagnostics transform=identity);;
model Time*VStatus(0)=LogBUN HGB Platelet Age LogWBC
Frac LogPBM Protein SCalc
/  ties=efron rl;
run;


/*customize this plot on your own*/
proc sgplot data=zphPlot(obs=201);
scatter x=time y=LogBUN
/markerattrs=(symbol=circlefilled color=gold) transparency=0.2;
band x=PBSPLINE_XVAR_YVAR_ALPHA_ALP___X 
     lower=PBSPLINE_XVAR_YVAR_ALPHA_ALP_MLL
	 upper=PBSPLINE_XVAR_YVAR_ALPHA_ALP_MLU/fillattrs=(color=navy) transparency=0.6;
series x=PBSPLINE_XVAR_YVAR_ALPHA_ALP___X y=PBSPLINE_XVAR_YVAR_ALPHA_ALP___Y/lineattrs=(color=red);
run;

V.S.

Re: How to get time-varying coefficient line and CI to stand out over data points in proc phreg zph

dwhitney — Thu, 21 May 2026 18:15:38 GMT

Ksharp, thank you, kindly! This worked perfectly and the figures are beautiful!

topic How to get time-varying coefficient line and CI to stand out over data points in proc phreg zph in SAS Programming

How to get time-varying coefficient line and CI to stand out over data points in proc phreg zph

Re: How to get time-varying coefficient line and CI to stand out over data points in proc phreg zph

Re: How to get time-varying coefficient line and CI to stand out over data points in proc phreg zph