topic show exact date along x-axis in survival curve in Statistical Procedures

show exact date along x-axis in survival curve

yubaraj — Wed, 29 Jun 2022 20:13:25 GMT

Hi All

I am trying to create a cumulative incidence curve showing cumulative vaccine coverage in a fixed cohort.

The follow up starts at Nov 24 2017 and ends in May 23 2018.

I want to show dates (last of each months and 15th of each months. i.e Nov 30, Dec 15, Dec 31 and so on along the x-axis).

I am using %NEWSURV macro, but could not figure out any customization to insert dates along x-axis.

I was wondering if this is possible at all. Is it possible to add manual labels or some alternate ways.

I am using SAS 9.4.

Thanks a lot

Yuba

Re: show exact date along x-axis in survival curve

Reeza — Wed, 29 Jun 2022 20:27:45 GMT

According to the docs for X axis:

X-axis can be transformed into other time units (days to months, etc.)

So I think this would require customizing the code directly.

Look for the XAXIS options in the code to apply a format along with a custom format.

Note that this would require that you have everyone start on the exact same date.

For cumulative vaccine coverage, would that be any different than using a Cumulative Distribution function in this case? Not sure censoring matters here unless you have dropouts.