Differences in early, intermediate, and long-term mortality among elderly patients admitted to the ICU: results of a retrospective observational study.

Background: Few studies have investigated both short- and long-term prognostic factors, and the differences between chronic and acute conditions in the very old critically ill patient. Our study aims to shed light in this field and to provide useful prognostic factors that may support clinical decisions in the management of the elderly.

Methods: Six ICUs collected data concerning 80-year-old (or more) patients admitted in 2015 and 2016 and followed-up until May 2018.