are the test samples keeping the balance between positive and negative cases?

Hi When you split the validation data for the different rounds and submissions do you make the random split in such a way that the ratio of positive to negative cases is constant and similar to the balance in the training set? thanks DA

Created by exquirentibus veritatem exquirentibus
Dear DA, The Split is truly random without regard to the ratio f high risk to low risk or censoring. However I have checked and it roughly balanced. As we discussed in the webinar, participants should not expect the outcome distributions of the validation cohorts to necessarily match those of the training cohorts.

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Hi When you split the validation data for the different rounds and submissions do you make the random split in such a way that the ratio of positive to negative cases is constant and similar to the balance in the training set? thanks DA

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