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Using Electronic Health Record (EHR) is difficult because most of the time the true characteristic of the patient is not available. Instead we can retrieve the International Classification of Disease code related to the disease of interest or we can count the occurrence of the Unified Medical Language System. None of them is the true phenotype which needs chart review to identify. However chart review is time consuming and costly. PheVis is an algorithm which is phenotyping (i.e identify a characteristic) at the visit level in an unsupervised fashion. It can be used for chronic or acute diseases.

An example of how to use PheVis is available in the vignette. Basically there are two functions that are to be used: train_phevis which trains the algorithm and test_phevis which get the predicted probabilities.

The detailed method is available in the paper preprint proposed by Ferté et al (2020).

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.