Kaplan Meier

[#1]

Hi everyone,

I was wondering if someone has experience in designing a Kaplan Meier survival curve. I´m going to start to develop this kind of report that seems quite complex and was hoping somenone could guide me.

Thank you.

Cheers,

Pablo T.

[fernandotoledo]

hI,

Never heard about this kind of analisys.

I´ll follow this topic and share everything I find about it!

best regard,

Fernando

[#3]

Hi Fernando,

Thanks for your quick answer. In order to inform a little more what the Kaplan Meier method is you can follow the next link:

http://www.cancerguide.org/scurve_km.html

It's a statistical tool to graph the probability of a patient of surviving as time passes by. I´ll be using it in relation to transplants, where my databases have the information of the day of the trasplant and the date of the deaths of the patients.

Any help will be appreciated.

Bye,

Pablo T.

[Anonymous]

Hi

I've done Kaplan Meier time to event and 1-KM time to drop out with 95% Confidence Intervals around. I have done it by coding each line + 2 CI lines in one object and overlayed a few of these. The dimension in the first object takes the first treatment, the second the second and so on. Never got to fit in all treatments/arms in a single QV object.

If you know how to calculate the number at risk, fialures, proportion surviving and cumulative survival in Excel or so, you can do it in QV as well.

It is fully functional and looks great. Lines are color coded with treatment color (throughout the application) and CI are stipulated + color coded in my version. It was done on a multi study SAS dd dw. It is fast and dynamic: choose study (or studies) + parameter + misc selections to reduce the population, 1 second, and boom. You have a KM with CI. Also added a show hide CI button.

I realize it is an old post and that you might want an example (which I can not provide).

Best of luck.

Best regards

Nicolai

[#5]

Hi Nicolai,

Is it possible for you to provide an example of just the objects with no data being loaded?  I am hoping I could load some dummy data. I am currently scoping the potential to use Qlikview for a medical research database and it would be great to be able to demonstrate Qlikview can do this analysis.

Great timing that you posted this two days ago especially on such an old post so thank you so much for that.

Kind regards,

Dan

[Anonymous]

Hi

Sorry, at this point I can't. I started development of KM as part of a project, and recently refined it alot and cannot share the application.

The reason I posted to Pablo's request in the first place was to let him know that it is in fact possible.

I am afraid you will have to do the work yourself, but if you approach it like you would if you were to do all the calculations manually (e.g. in excel and not SAS proc lifetest), I am sure you will figure out how to do it in QlikView.

Depending on your level of knowledge about KM, consider reading "How to Build the Kaplan-Meier Curve from the Ground Up" by David Franklin which is a good start. CI are a bit more triggier.

Best regards

Nicolai

[Lee_Matthews]

Here is an example of how to create the Kaplan Meier Curve

http://community.qlik.com/message/401280#