The purpose of this paper is to develop a decision support system based on a process of knowledge extraction. This system allows the prediction of the empowerment of a patient with cancer treated by chemotherapy. The first part of this article outlines the process of empowerment of the patient. The second part explains the principle of decision support systems and the principle of the Knowledge Discovery from Databases (KDD), inspired by the data mining method. The third section describes the approach for the implementation of the system. The fourth section applies this approach to raw data of the different patients.

Empowerment, DSS, KDD, Holon

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