A visual approach of care pathways from the French nationwide SNDS database - from population to individual records: the ePEPS toolbox.

Secondary use of medical and administrative databases has become a powerful tool for epidemiological studies. In that respect, the recent access opening of French nationwide health record database or Système National des Données de Santé is a great opportunity to carry out comprehensive health studies at the country level. However, using this database is far from being straightforward for nonexpert data scientists; so, dedicated tools needed to be developed. Our contribution is focused on data management and visualization tools able to query and cope with the complexity of care pathways of patients. The scope of the toolbox presented below goes from interactive tools for building groups of patients to timeline representations of individual patient healthcare trajectories.