Predictive Model for Mortality in Older People With Critical Illness

Inclusion Criteria: * Men and women aged 75 or older. * Admission to an ICU from the Emergency Department. * Availability of or possibility to contact a participant's informant. * Informed consent for participation in the study, either by the participant or a valid legal representative. Exclusion Criteria: Participants meeting any of the following exclusion criteria will not be included in the study: * Patients transferred to the Emergency Department from a hospital ward. * Patients who die within the first 24 hours of ICU admission. * Patients admitted to Step-Down Units. * Patients requiring ICU admission for any of the following reasons: Orotracheal intubation or advanced cardiopulmonary resuscitation performed prior to arrival at the Emergency Department. AV block awaiting pacemaker implantation. Activation of the STEMI or Stroke care pathway. Post-cardiac catheterization for acute coronary syndrome. * Participation in another clinical study involving an intervention, procedure, or visit schedule that is incompatible with the present study.