1 Clinical Fellow, Department of Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA 2 Assistant Professor, Department of Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA 3 Professor, Departments of Critical Care Medicine and Surgery, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylv...

The article by Seely et al. in this issue of Critical Care highlights that variability portend prognosis. Numerous parameters interact to modify variability in intensive care. The commentary discusses why variability can nevertheless accurately estimate prognosis and how easily this can be implemented in the critically ill.

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In two areas of moral theology, the Catholic tradition has had an asset in its flexibility: the responsibility to sustain individual human lives, and the just distribution of the material and social resources which contribute to the "common good." Moral analysis in the former area is newly tested by medical technology which prolongs life in four related instances: seriously abnormal newborns; a...