b'CARES 2023 Annual ReportSurvival OutcomesPatient OutcomesBased on local EMS agency protocols, 42.9% of patients were pronounced on scene after resuscitative efforts were terminated in the pre-hospital setting (Figure 16). The success of resuscitation efforts in the field is often measured by a patients return of spontaneous circulation (ROSC). In 2023, sustained ROSC (defined as 20 consecutive minutes of ROSC, or its presence at transfer of care to a receiving hospital) was achieved by 27.1% of CARES patients.The rate of survival to hospital admission was 26.1% (ED outcome missing for 302 cases; 0.2%), and the rate of survival to hospital discharge was 10.2% (hospital outcome missing for 332 cases; 0.2%). Among patients discharged alive, the majority had a neurologically favorable outcome, indicated by a Cerebral Performance Category (CPC) score of 1 or 2 (Table 3).50%42.9% Pre-hospital survival In-hospital survival40%31.0%30% 26.1%20%10.2%10% 8.1%0%Efforts ceasedRescuscitation terminated inAdmitted Survived toDischarged with on scene ED to hospital hospital discharge CPC 1 or 2Figure 16. Unadjusted pre-hospital and in-hospital OHCA patient outcomes.Table 3. Cerebral Performance Category (CPC) ScoresCPC Score DescriptionCPC 1 Good Cerebral PerformanceConscious, alert, able to work and lead a normal life.Moderate Cerebral DisabilityCPC 2 Conscious and able to function independently (dress, travel, prepare food), but may have hemiplegia, seizures, or permanent memory or mental changes.Severe Cerebral DisabilityCPC 3 Conscious, dependent on others for daily support because of impaired brain function (in an institution or at home with exceptional family effort).Coma, Vegetative StateCPC 4 Not conscious. Unaware of surroundings, no cognition. No verbal or psychological interactions with environment.CPC 5 Death40 41'