Age is not a risk factor in survival of severely ill patients with co-morbidities in a medical intensive care unit.

Background: The individuals over 65 years old constitute an important patient population of medical intensive care units (ICUs).

Aim: To evaluate the risk factors for mortality in a medical ICU consisting a group of patients with a large number of co-morbidities.

Methods: This is a retrospective study involving patients who were followed for more than 48 h.