Cognitive intra-individual variability in breast cancer survivors: A systematic review.

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.

Interventions for Cognitive Deficits in Breast Cancer Survivors Treated With Chemotherapy.

BACKGROUND: Cognitive deficits are distressing adverse effects of chemotherapy that have a negative effect on quality of life in breast cancer survivors (BCSs). Cognitive deficits in cancer survivors are a top research and clinical practice priority. OBJECTIVE: The aims of this study were to describe cognitive deficits that occur after chemotherapy, describe deficits in BCSs treated with chemotherapy within a framework of cognitive reserve and neuroplasticity, and discuss cognitive interventions (ie, cognitive training interventions, compensatory strategies with cognitive training interventions, pharmacological interventions, and complementary and integrative medicine interventions). METHODS: PubMed search yielded 21 intervention studies of cognitive deficits in BCSs. RESULTS: Cognitive training interventions and compensatory strategies with cognitive training resulted in improvement of cognitive deficits. Methylphenidate did not result in cognitive improvement. Modafinil showed improvement in attention. Some complementary and integrative medicine interventions are promising. CONCLUSIONS: Cognitive training has been most beneficial. Effectiveness of pharmacologic and complementary and integrative medicine interventions has not yet been established. IMPLICATIONS FOR PRACTICE: While limited evidence is available to guide clinical management of cognitive deficits in BCSs, validating patients' symptom experience and evaluating co-occurring symptom clusters such as fatigue, sleep, and depression, are suggested.

Cognitive Deficits in Breast Cancer Survivors After Chemotherapy and Hormonal Therapy.

Adjuvant treatments, specifically chemotherapy and hormonal therapy, have dramatically increased breast cancer survival, resulting in increased attention to the residual effects of treatment. Breast cancer survivors (BCS) frequently report that cognitive deficits are a particular source of distress, interfering with many aspects of quality of life. The literature on neuropsychological performance measures in BCS supports the reality of subtle cognitive deficits after both chemotherapy and hormonal therapy. This premise is supported by recent imaging studies, which reveal anatomical changes after chemotherapy as well as changes in patterns of neural activation while performing cognitive tasks. This review suggests that, even when performance on neuropsychological performance measures is within normal limits, BCS may be using increased cognitive resources in the face of reduced cognitive reserve. Potential interventions for cognitive deficits after adjuvant therapy include prescriptions for healthy living, pharmacotherapy, complementary therapy, and cognitive remediation therapy directed toward specific cognitive deficits or a combination of several strategies.

Information at the Point of Care: An Informational Application for Cancer Resources.

The purpose of this project was to design, develop, and modify a cancer resource application (app) that providers, patients, and caregivers could use to locate local and national cancer resources. The project design used a modified version of the Questionnaire for User Interaction Survey 7.0 to gather information from a convenience sample of nurses and community participants regarding their perception of the app. These data helped to identify gaps in resources and modifications needed to make the app more user-friendly. The current cancer care system is complex, and patients often complain of uncoordinated care, lack of information, and insufficient psychosocial support. Cancer centers are working to meet the American College of Surgeons 2015 recommendation of psychosocial assessment and referrals; the Cancer Resource APP described here provides the resources to meet this need. Prototypes of the app were tested in practice and community settings, then solicited feedback guided needed technology modifications. The resulting Cancer Resource APP provides the healthcare community with information to make timely and consistent referrals for patients and caregivers.

Attention and memory deficits in breast cancer survivors: implications for nursing practice and research.

Breast cancer survivors (BCSs) commonly report deficits in attention and memory, cognitive functions crucial for daily optimal functioning. Perceived deficits are reported before, during, and after adjuvant therapy and affect quality of life throughout survivorship. Deficits of attention and memory are particularly disruptive for BCSs working or attending school who report that subtle impairment diminishes their confidence and their performance at all levels of occupation. Chemotherapy and endocrine therapy contribute to attention and memory deficits, but research findings have not fully established the extent or timing of that influence. Fortunately, potential interventions for attention and memory deficits in BCSs are promising. These include cognitive remediation therapies aimed at training for specific areas of deficit, cognitive behavioral therapies aimed at developing compensatory strategies for areas of deficit, complementary therapies, and pharmacologic therapies.