Introduction. The measurement of severity scores in adult and pediatric resuscitation provides a tool for evaluating the clinical performance of resuscitation services. No pediatric studies have investigated the association between current procedure and diagnostic cost indices with pediatric ICU patient severity and mortality.

Objectives. The main objective of this project in real-life situations, in 14 French pediatric intensive care units, is to validate the recently available PIM3 and PRISM IV severity scores, which take into account the clinical dimension of performance in pediatric intensive care.

This project is a French multicenter prospective observational research project involving 14 French pediatric intensive care units belonging to the Groupe Francophone de Réanimation et Urgences Pédiatriques (GFRUP). All patients under 18 years of age admitted to the 14 pediatric intensive care units affiliated with the GFRUP and voluntarily participating in the project will be included in the study.

Expected outcomes are: Validation of PIM3 and PRISM IV scores in a French population to assess clinical performance. To develop a predictive model of mortality and a predictive model of cost in French pediatric intensive care units.

Inclusion Criteria:

• All patients under 18 years of age admitted to the 14 pediatric intensive care units and voluntarily participating in the project will be included in the study.

Exclusion Criteria:

- Children of age of reason or parents/legal guardians of children refusing participation in this project will be excluded from the study.

14 French pediatric intensive care units belonging to the Groupe Francophone de Réanimation et Urgences Pédiatriques (GFRUP)