Studies included in the systematic review of the effects of supplemental parenteral selenium treatment in critically ill patients.

ITT, intention to treatment; Se, selenium; ICU, intensive care unit; T, treatment group; C, control group; APACHE, acute physiology and chronic health evaluation; SOFA, sequential organ failure assessment; SIRS, systemic inflammatory response syndrome; ISS, injury severity score; SAPS, Simplified Acute Physiologic Score; CT, computed tomography; No., number; NA, not applicable.