Package used to calculate c-index

Hi, I want to ask what packages will be used to calculate the survival concordance (c-index)? It seems lifeline, pysurvival and scikit-survival are commonly used to calculate c-index. Thanks, Yang

Created by Yang Liu KateYLiu
Dear @KateYLiu , I revisited this question and I think you might have been getting at the fact that survial::concordance() assess concordance between time to event a prediction of survival while survcomp::concordance.index() assess predicted risk of event (relapse or death) with actually time to event. We have asked the participant provide predicted response to Nivolumab with is positively associated with survival. We actually pass $$ -1 \times predicted Nivo response $$ to the survcomp::concordance.index() function. I hope this helps! Mike
Thank you, @Michael.Mason, for the quick reply. This helps a lot! Yang
Hi @KateYLiu , The concordance index is computed using default parameters from the R package, [survcomp concordance.index() function](https://www.rdocumentation.org/packages/survcomp/versions/1.22.0/topics/concordance.index). Hope this helps, Mike

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Hi, I want to ask what packages will be used to calculate the survival concordance (c-index)? It seems lifeline, pysurvival and scikit-survival are commonly used to calculate c-index. Thanks, Yang

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