Elderly patients make up between 26% and 51% of patients who are admitted to ICUs. The proportion of individuals in North America aged > 65 is projected to increase to 20% of the population by 2026. As population demographics change, and as new technologies, pharmaceuticals, and interventions prolong lives, the proportion of elderly patients admitted to ICUs and surviving ICU stay will continue to increase. Studies that have examined only ICU or hospital survival as an outcome have had variable results. Few studies have demonstrated that elderly ICU patients experience higher mortality rates, while others have demonstrated that age alone, when adjusted for other factors, is not an important prognostic indicator among elderly patients admitted to the intensive care units (ICU). However, age is still used as an important criteria for admission to ICUs. Most studies reviewed have looked at patients sixty-five to ninety years old. To our knowledge only two studies to date have addressed this issue among patients older than 90 to an ICU, both were retrospective.