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Can one of the participants on this list point us to a good discussion on the proper 'framing' of NNT in the context of a continuous outcome measure. For example, a rather bright fellow has posed this question to me: Treatment "X" shortens the hospital stay for disease "Z" by 0.50 hospital days. Is there a relevant way to present this that is roughly equivalent to a NNT? I thought, off hand, that this would be somewhat equivalent to suggesting that 2 children would have to be treated to 'save' one hospital day. Fundamentally this appears overly simplistic, but I would be interested in hearing how others might have dealt with this before. Thanks in advance, Robert L. Davis, MD, MPH Pediatric Evidence Based Program Department of Pediatrics University of Washington Seattle, WA , USA %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%