Background: Critical care survivors frequently suffer persistent morbidity and increased risk of mortality compared to the general population. However, there are no standardised tools to identify at-risk patients to target potential interventions. Our aim was to establish whether the “Sabadell score”, a simple tool applied upon critical care discharge, is an independent predictor of five-year mortality.Methods: Prospective observational cohort study of adults admitted to a mixed critical care unit at Aintree University Hospital NHS Foundation Trust, Liverpool, United Kingdom. Sabadell score applied to all patients from September 2011 to December 2017. Primary outcome: five-year mortality assessed using a multivariable flexible parametric survival analysis adjusted for demographics, and clinically relevant covariates. Primary outcome: Adults discharged alive following critical care admission. Results: There were 5954 patients with a minimum of 18 months follow-up. Mean age was 59.5 (SD±17) and 57.1% were male. Patients were categorised into Sabadell scores, zero (38.4%), one (47.9%), two (10.5%) and three (3.1%). Adjusted hazard ratios for mortality were 2.09 (C.I. 1.85–2.36), 3.95 (C.I. 3.39–4.60) and 21.04 (C.I. 17.24–25.68) respectively. Sabadell score three predicted 99.9%, 99.5%, 98.5% and 87.4% mortality at five years for patients ³80 (aHR 3.37), 60-79 (aHR 2.52), 40-59 (aHR 2.03) and 16-39 respectively. A Sabadell score of two predicted 71.0%, 52.7%, 44.8% and 23.7% mortality at five years for these age categories.Conclusions : Sabadell score is an independent predictor of five-year survival after critical care discharge. These findings could be used to guide provision of increased support for patients after critical care discharge and/or informed discussions with patients and relatives about dying to ascertain their future wishes.