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mikethejumper
mikethejumper
Level I

Plotting confidence intervals in parametric survival analysis(Weibull)

Created: Mar 11, 2014 02:20 PM  |  Last Modified: Oct 18, 2016 1:34 PM (4398 views)


Hi all,

I am doing a parametric survival analyses (Weibull), and I would like to plot a curve similar to the one below. I could plot the mean (blue trace below), as JMP gave me the formula for it, but I am not able to plot the confidence intervals as JMP wont give the formula. However I could see the plot (mean and CIs) in the "profiler" of the platform.

The formula to compute row wise mean quantiles that JMP gave me is below, where : Probability is a column with numbers from 0.001 to 1 by 0.001. Delta, Intercept and AGE are regression predictions.  Is it possible to compute row wise confidence intervals using the same formula, knowing standard errors?

Weibull Quantile( : Probability, 1 / Delta, Exp(Intercept+ AGE* :age )

Any suggestions are appreciated.

Thanks in advance.

5669_sample1.png

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1 REPLY 1
michael_jmp
Staff michael_jmp
Staff

Re: Plotting confidence intervals in parametric survival analysis(Weibull)

Created: Jan 26, 2015 10:48 AM  |  Last Modified: Oct 28, 2016 6:12 AM (4250 views)  |  Posted in reply to message from mikethejumper 03-11-2014

Hello,

Please see my response to Save formula for 95% CI in parametric survival analysis. In your example, you only have one X variable (AGE), so you might be able to use Fit Life by X.

Regards,

Michael

Michael Crotty
Principal Statistical Writer
Manager, Statistical Documentation
JMP Development