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Vance DE, Collette C, Frank JS, Billings R, Deaver J, Del Bene VA, Fazeli PL, Bail JR, Li W, Triebel K, Von Ah D, Wang HL. Cognitive intra-individual variability in breast cancer survivors: A systematic review. APPLIED NEUROPSYCHOLOGY. ADULT 2023:1-15. [PMID: 37878814 PMCID: PMC11043212 DOI: 10.1080/23279095.2023.2270097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2023]
Abstract
Subjective and objective cognitive impairments in Breast Cancer Survivors (BCS) often do not correlate. One important contribution to the reported disparities may be the reliance on mean-based cognitive performance. Cognitive intra-individual variability (IIV) may provide important insights into these reported disparities. Cognitive IIV refers to the fluctuation in performance for an individual on either one cognitive task across a trial or dispersed across tasks within a neuropsychological test battery. The purpose of this systematic review was to search for and examine the literature on cognitive IIV in BCS. The PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) approach was used to search for all articles related to cognitive IIV in BCS. MEDLINE (via PubMed), Embase, and Scopus databases were searched using detailed search terms and strategies. Initially, 164 articles were retrieved but only 4 articles met the criteria for this systematic review. BCS differed from healthy controls in similar ways across the four studies, generally demonstrating similar performance but showing increased cognitive IIV for the more difficult tasks. Differences were enhanced later during chemotherapy. The four studies provide support for cognitive IIV as a useful measure to detect the subtle objective cognitive change often reported by BCS but frequently not detected by standard normed-based cognitive testing. Unexpectedly, measures of cognitive IIV were not consistently associated with self-reported measures of cognition.
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Affiliation(s)
- David E Vance
- School of Nursing, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Christopher Collette
- Department of Neurology, University of Alabama at Birmingham, Birmingham, AL, USA
| | | | - Rebecca Billings
- School of Nursing, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Jill Deaver
- UAB Libraries, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Victor A Del Bene
- UAB Libraries, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Pariya L Fazeli
- School of Nursing, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Jennifer R Bail
- College of Nursing, The University of Alabama in Huntsville, Huntsville, AL, USA
| | - Wei Li
- Department of Clinical and Diagnostic Sciences, School of Health Professions, University of Alabama at Birmingham, Birmingham, AL, USA
| | | | - Diane Von Ah
- College of Nursing, Ohio State University, Columbus, OH, USA
| | - Hsiao-Lan Wang
- School of Nursing, University of Alabama at Birmingham, Birmingham, AL, USA
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