The aim of the study is to demonstrate that "frail" patients, defined as having a CFS score greater than or equal to 5, and "severely" frail patients, defined as having a CFS score between [6-7] as defined by Bagshaw et al (14), constitute an independent risk factor (RF) for mortality.

In the same way, as an exploratory study, we will try to find out whether clinical frailty constitutes a risk factor for extending the length of hospital stay, the risk of short/medium-term readmission, as has already been demonstrated for patients admitted to intensive care from all causes (15), or for impaired quality of life.

The objective is to have a better understanding of the implications and outcomes associated with pre-hospital frailty in young critically ill patients.

This analysis will also help to clarify prognoses and contribute to better decision-making on the intensity and proportionality of care, as well as providing better information and helping to manage the expectations of patients and their families in terms of survival prognosis and subsequent quality of life.

Recent studies show the impact of frailty in a middle-aged or even young population of patients admitted to critical care in terms of mortality (13), and the persistent risk of impairment of physical and mental capacities after resuscitation (14). To date, few studies have looked at clinical frailty as a risk factor for mortality in a middle-aged or young population, more specifically those suffering from septic shock, which is already known to be a major factor in morbidity and mortality (15,16), with repercussions on long-term quality of life.

The aim of the study is to demonstrate that "frail" patients, defined as having a CFS score greater than or equal to 5, and "severely" frail patients, defined as having a CFS score between [6-7] as defined by Bagshaw et al (14), constitute an independent risk factor (RF) for mortality.

In the same way, as an exploratory study, we will try to find out whether clinical frailty constitutes a risk factor for extending the length of hospital stay, the risk of short/medium-term readmission, as has already been demonstrated for patients admitted to intensive care from all causes (15), or for impaired quality of life.

The objective is to have a better understanding of the implications and outcomes associated with pre-hospital frailty in young critically ill patients.

This analysis will also help to clarify prognoses and contribute to better decision-making on the intensity and proportionality of care, as well as providing better information and helping to manage the expectations of patients and their families in terms of survival prognosis and subsequent quality of life.

Inclusion Criteria:

• Patients aged ≥18 years and ≤ 65 years
• Patient admitted to intensive care - resuscitation
• Patient admitted for suspected or documented type 3 sepsis
• Presence of vasopressor amines to maintain MAP > 65mmHg despite filling
• Lactatemia ≥ 2 mmol/L on admission.

Exclusion Criteria:

• Patient moribund on admission
• Patients with severe pre-existing dementia and/or cognitive decline, suffering from severe neurodegenerative diseases that prevent the patient from living independently at baseline, including mental illness requiring institutionalisation, including acquired or congenital mental retardation, etc.
• Pregnant women or women in labour
• Patients under guardianship or curatorship
• Patients deprived of their liberty
• Patient and/or family unable to speak or understand French.

All patients admitted to intensive care will be studied for this study. Patients meeting the inclusion criteria and with no non-inclusion criteria will be included in the study after obtaining the patient's or relative's, if applicable, non-objection.