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Re: multiple ROC curves, logistic regression
Posted: Mon Feb 12, 2024 2:30 am
by seol
Hi anagrammarian
Yesterday, In psychoPDA > Test ROC module, I noticed that the deLong Test does not resolve the missing value and gives an error, so I am adding a deLong Test that resolves the missing value issue to snowCluster > ROC Analysis.
I hope this will help you.
Best Regards
Seol
Re: multiple ROC curves, logistic regression
Posted: Tue Apr 09, 2024 1:01 pm
by elifol
Hi Seol,
I just posted a Q in the help section, and you seem to be the right person to answer, Im not sure how to best tag you in this conversation..
The question is what the cut-off value is based on, which method used. And what is the significance of Ir.eta, see picture
Thanks in advance for your time!
best,
Re: multiple ROC curves, logistic regression
Posted: Wed Apr 10, 2024 12:01 am
by seol
Hi elifol
With the following example,
The optimal cutoff value for Height can be found by substituting the value of lr.eta (0.545 ) into the above formula outcome, substituting the slope and intercept values for Height, and solving the equation.
Best
Seol
Re: multiple ROC curves, logistic regression
Posted: Wed Apr 10, 2024 12:11 am
by seol
Hi elifol
Compare the above results with Binomial Logistic Regression in jamovi below:
Best
Seol
Re: multiple ROC curves, logistic regression
Posted: Wed Apr 10, 2024 12:22 am
by seol
you will get the same results with the following analysis.
Best
Seol
Re: multiple ROC curves, logistic regression
Posted: Thu Apr 11, 2024 6:50 pm
by elifol
Thank you!
I am more familiar with using Youden Index cut-off or closest topleft criterion, but this is another way of calculating the same thing? In my example the result is Yes or No (diagnosing a disease) and not a continous variable.
best,
Elin
Re: multiple ROC curves, logistic regression
Posted: Fri Apr 12, 2024 1:40 am
by seol
Hi
The main ROC analysis in snowCluster module is based on multipleROC R package.
For more information about multipleROC R package, see the following link:
https://github.com/cardiomoon/multipleROC
Kind Regards
Seol