Key result
Different reliable change indices detect post-CABG cognitive dysfunction at similar rates.
Why the study?
Different reliable change indices (RCIs) use varying error estimates and corrections for practice effects in detecting postoperative cognitive dysfunction (POCD), requiring evaluation of their influence.
Does the choice of reliable change index (RCI) error estimate affect the detection of postoperative cognitive dysfunction in patients undergoing CABG?
Population
160 patients undergoing CABG surgery
Comparison
Three RCI rules with constant correction for practice effects vs standard RCI without correction
Design
Observational study applying different RCI methods
Follow-up
1 week postoperatively
Authors
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Different RCIs detect similar POCD rates after CABG; leaves open which error estimate best predicts clinical outcomes.
Observational (n=160)
Does the choice of reliable change index (RCI) error estimate affect the detection of postoperative cognitive dysfunction in patients undergoing CABG?
Different reliable change indices identify similar proportions of postoperative cognitive dysfunction in CABG patients, but using within-subject standard deviation is theoretically more appropriate when correcting for practice effects.
LEWIS et al. (2007) conducted an observational in Patients undergoing coronary artery bypass graft (CABG) surgery (n=160). Reliable change indices (RCIs) with correction for practice effects vs. Standard RCI with no correction for practice was evaluated on Identification of postoperative cognitive dysfunction (POCD). Four different reliable change indices identified postoperative cognitive dysfunction in a similar proportion of CABG patients, with the within-subject standard deviation being a theoretically appropriate denominator.
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