[Feature Request]: Youden's J point

[aboyle57]

Description

Functionality to calculate Youden's J point in data to identify the optimal value of a biomarker to predict a binary outcome

Purpose

No response

Use-case

Evaluating biomarker performance (as a threshold) in predicting mortality

Is your feature request related to a problem?

No response

Is your feature request related to a JASP module?

Learn Bayes

Describe the solution you would like

An option to automatically calculate Youden's J point

Describe alternatives that you have considered

No response

Additional context

No response

[tomtomme]

@aboyle57
thx for the request. Is this something for the logistic regression or binomial test (binary outcome)? Can you add details / papers / R-Packages?

[aboyle57]

@tomtomme Thanks Thomas.
The package that's been used in R is pROC. https://cran.r-project.org/web/packages/pROC/pROC.pdf

Does that help? It has script for Youden index within it.

[tomtomme]

@aboyle57
Thx. I see, this is then for the binary classification module, as you requested. The paper is certainly helpful.

[aboyle57]

@tomtomme Great. Do you think it's something that could be incorporated? It would be a neat addition to the ROC curve section.

I tried to run the R script in the R module within JASP but I couldn't get it to work, presumably because that functionality doesn't exist!

[tomtomme]

@aboyle57
yeah sometimes not all needed R-packages are there. Or you need to select a different jasp module from within the R-terminal of JASP beforehand.
either way, I can give no timeline, but it is now on the list