Journal article

The influence of different error estimates in the detection of post-operative cognitive dysfunction using reliable change indices with correction for practice effects

Matthew S Lewis, Paul Maruff, Brendan S Silbert, Lis A Evered, David A Scott

ARCHIVES OF CLINICAL NEUROPSYCHOLOGY | PERGAMON-ELSEVIER SCIENCE LTD | Published : 2006

Abstract

The reliable change index (RCI) expresses change relative to its associated error, and is useful in the identification of post-operative cognitive dysfunction (POCD). This paper examines four common RCIs that each account for error in different ways. Three rules incorporate a constant correction for practice effects and are contrasted with the standard RCI that had no correction for practice. These rules are applied to 160 patients undergoing coronary artery bypass graft (CABG) surgery who completed neuropsychological assessments preoperatively and 1 week post-operatively using error and reliability data from a comparable healthy non-surgical control group. The rules all identify POCD in a s..

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