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July 21, 2006Archives of Clinical Neuropsychology

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

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Why the study?

Does the use of different reliable change indices (RCIs) with correction for practice effects alter the detection of post-operative cognitive dysfunction in patients undergoing CABG compared to standard RCI?

Population

160 patients undergoing coronary artery bypass graft surgery, and a comparable healthy non-surgical control…

Comparison

Three reliable change index rules incorporating… vs Standard RCI with no correction for practice

Design

Cohort

Follow-up

1 week post-operatively

Authors

MLM LEWISLa Trobe UniversityPMPaul MaruffEdith Cowan UniversityBSB SILBERTThe Alfred Hospital

Discussion

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Implication

Similar POCD rates across RCIs post-CABG; supports within-subject SD preference but leaves open need for prospective validation before practice change.

Structured PICO

Does the use of different reliable change indices (RCIs) with correction for practice effects alter the detection of post-operative cognitive dysfunction in patients undergoing CABG compared to standard RCI?

P
Population
160 patients undergoing coronary artery bypass graft (CABG) surgery, and a comparable healthy non-surgical control group
I
Intervention
Three reliable change index (RCI) rules incorporating a constant correction for practice effects
C
Comparator
Standard RCI with no correction for practice
O
Outcome
Identification of post-operative cognitive dysfunction (POCD) at 1 week post-operativelysurrogate

Different reliable change indices identify post-operative cognitive dysfunction in a similar proportion of CABG patients, though using within-subject standard deviation is theoretically more appropriate when correcting for practice effects.

Cite This Study

LEWIS et al. (2006) studied this question.

synapsesocial.com/papers/6a7661c6aecdb601a7475474https://doi.org/10.1016/j.acn.2006.05.004
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Impairment of cerebral function following cardiac and other major surgery1989 · 71 citations
  2. 2Perception of cognitive function in older adults following coronary artery bypass surgery.1999 · 52 citations
  3. 3The sensitivity and specificity of three common statistical rules for the classification of post‐operative cognitive dysfunction following coronary artery bypass graft surgery2005 · 61 citations
  4. 4Cognitive performance after coronary artery bypass grafting: A follow-up study2002 · 76 citations
  5. 5Clinical significance: A statistical approach to defining meaningful change in psychotherapy research.1991 · 7,959 citations