Cognitive dysfunction prevalence and associated factors in older breast cancer survivors

Subjective and Objective Cancer-Related Cognitive Impairments Among Systemic and Radiation Therapy-Naïve Female Cancer Patients

BACKGROUND

Cancer-related cognitive impairment (CRCI) is a frequent and burdensome problem that is still insufficiently understood and managed. We investigated subjective and objective measures of CRCI, as recommended by the International Cancer and Cognition Task Force (ICCTF) in cancer patients prior to systemic or radiation therapy with respect to potential influencing or associated psychosocial, demographic, or lifestyle factors.

METHODS

Female patients with breast or gynecological tumors (n = 239, mean age = 55.5, SD = 11.6) prior to any systemic or radiation therapy completed validated subjective (FACT-Cog: perceived cognitive impairment [PCI], perceived cognitive ability [PCA], impact on quality of life [IQoL]) and objective measures of CRCI (Trail Making Test [TMT-A and -B], Controlled Oral Word Association Test [COWA], and Hopkins Verbal Learning Test-Revised [HVLT-R]). Association with cross-sectionally assessed age, body mass index, education, smoking, alcohol intake, sleep problems, social support, anxiety, and pain was investigated using multiple linear regression models.

RESULTS

A quarter (25.1%) of patients showed indication for CRCI based on the PCI score. Subjective and objective CRCI measures showed no or only weak correlations, also when adjusting for age and education (partial Spearman correlations with each other, all |r| ≤ 0.21). Anxiety, sleep problems, and pain were significantly associated with low subjective cognitive function (PCI, PCA, and IQoL). Poor objective cognitive values (TMT, COWA, and HVLT-R) were mainly determined by higher age and lower education.

CONCLUSIONS

Cancer-related cognitive impairment is not solely (chemo-)therapy-induced but may be triggered or influenced by anxiety, sleep problems, and pain. Addressing these issues early in the treatment phase could potentially alleviate perceived CRCI. The ICCTF-recommended neuropsychological tests do not adequately capture this CRCI prior to systemic or radiation therapy, but could serve as complementary tools to monitor cognitive changes over time, independent of psychosocial influences.

Altered Mental Status in Cancer

Patients with cancer experience high rates of alterations in mental status. The mechanisms for altered mental status (AMS) in this population are manifold. The cancer itself may cause AMS through direct invasion of the central nervous system or as metastatic leptomeningeal spread. However, cancer patients are also vulnerable to tumor-associated complications such as seizures, cerebral edema, strokes, or cancer treatment-related complications such as infections, direct neural injury from radiation or chemotherapy, edema, or dysregulated autoimmune response from immunotherapies. Both during treatment and as sequelae, patients may suffer neurocognitive complications from chemotherapy and radiation, medications or opportunistic infections, as well as toxic-metabolic, nutritional, and endocrine complications. In this review, we describe a clinical approach to the cancer patient presenting with AMS and discuss the differential drivers of AMS in this patient population. While common etiologies of AMS in noncancer patients (toxic-metabolic or infectious encephalopathy, delirium) are also applicable to cancer patients, we additionally provide a cancer-specific differential diagnosis that warrants special consideration in the cancer patient with AMS.

Systematic review of associations between anxiety, depression, and functional/biological aging among cancer survivors

BACKGROUND

Evidence suggests a mind-body component to aging through which psychological distress from anxiety and depression drives molecular changes that promote early decline (ie, accelerated aging). Cancer survivors experience particularly high rates of anxiety and depression. Some survivors also have accelerated aging, though the relationships between anxiety and depression and aging are not clear. A synthesis of evidence is needed to understand the state of the science and impending priorities.

METHODS

PubMed, Embase, CINAHL, Web of Science, and PsycNet databases were searched for studies that measured associations between depression, anxiety, and nonchronological aging in cancer survivors (2012-2022). Data were methodologically evaluated.

RESULTS

Survivorship studies were included if they were peer reviewed, published in English from 2012 to 2022, and measured associations between anxiety and depression and aging. In total, 51 studies were included. Just over half were cross-sectional (53%). Foci included functional (n = 35 [69%]) and biological (n = 16 [31%]). Functional aging measures included frailty, sarcopenia, geriatric assessment, and cognition. Biological aging measures included telomere length, telomerase, age-related inflammatory blood-based biomarkers, renal insufficiency, anemia, and DNA methylation. We tested 223 associations. Associations between anxiety, depression, and aging were generally positive, though with varying strengths. Most compelling were associations between functional aging and depression. There were concerns for selection and measurement biases.

CONCLUSIONS

Findings suggest positive associations between anxiety, depression, and aging among cancer survivors. Future work is needed to clarify temporality, develop a consensus on the measurement of aging, and diversify cohorts.

Psychological resilience and post-traumatic stress disorder as chain mediators between personality traits and cognitive functioning in patients with breast cancer

BACKGROUND

Personality is a unique behavioral trait; cognition is how an individual knows and understands things. It is essential for everyday daily living. In patients with breast cancer, despite the growing body of research on personality and cognitive functioning, exploration of the underlying mechanisms is still relatively scarce. Therefore, this study aimed to investigate the impact of Big Five personality traits on cognitive functioning and the mediating role of psychological resilience and post-traumatic stress disorder(PTSD) between personality traits and cognitive functioning in patients with breast cancer.

METHODS

Convenience sampling was used, and a cross-sectional survey of 288 patients clinically diagnosed with breast cancer was conducted in the Department of Breast Surgery of the First Hospital of Jinzhou Medical University. The general information questionnaire, the Ten-Item Personality Inventory in China, the 10-item Connor-Davidson Resilience Scale, the Post-traumatic Stress Disorder Checklist-Civilian Version, and the Montreal Cognitive Assessment were used to measure the patient's general condition, personality traits, psychological resilience, PTSD, and cognitive function, respectively. Descriptive and correlation analyses were performed using SPSS 26.0 software, and mediation effect tests using SPSS PROCESS macro 3.3 software.

RESULTS

(1) Psychological resilience, PTSD, Big Five personality traits, and cognitive functioning were significantly correlated. (2) The effects of the Big Five personality traits (extraversion, conscientiousness, agreeableness, emotional stability, and openness) on cognitive functioning can be mediated through three indirect pathways: the separate mediating effects of psychological resilience and PTSD and the chain mediating effects of psychological resilience and PTSD, with a chain mediation effect of 0.014, 0.018, 0.014, 0.018, and 0.014, respectively. None of the 95% CI contained 0.

CONCLUSION

Personality traits can indirectly influence cognitive functioning in patients with breast cancer through the separate mediating roles of psychological resilience and PTSD and their chained mediating roles. This result suggests we pay more comprehensive attention to patients' cognitive function. Workers can be guided to assess patients' personality, psychological, and spiritual characteristics promptly in their work and adopt personalized care to safeguard good cognitive functioning.

Longitudinal Trajectories of Self-Reported Cognitive Function and Associated Factors Among Older Cancer Survivors

BACKGROUND

Cancer-associated cognitive decline may result in difficulties in maintaining daily life activities for older patients with cancer. It is, therefore, critical to identify changes in cognitive function throughout illness trajectories.

AIM

To determine the longitudinal patterns and factors associated with cognitive function among older cancer survivors.

METHODS

A secondary analysis was conducted using data from the 2012 to 2020 Korean Longitudinal Study of Aging database. A total of 207 cancer survivors aged 60 years and above were included in the analysis. Latent class growth modeling was employed to identify the trajectories of self-reported cognitive function, and logistic regression analysis was used to identify factors associated with these trajectories.

RESULTS

The cognitive function of older adults with cancer was divided into 2 distinct trajectories, characterized by differences in intercept (8) and slope (0.7): the "low and declining class" and the "high and sustainable class." The proportion of individuals belonging to the "high and sustainable class" (n = 153, 73.9%) was significantly and considerably higher than those in the "low and declining class" (n = 54, 26.1%). Individuals with low and declining cognitive function were more likely to be older, have a lower education level, live in rural areas, have poor handgrip strength, experience depression, and have lower social participation compared to those with high and sustainable cognitive function.

CONCLUSIONS

Our findings can help health care professionals develop tailored interventions for older cancer survivors with low cognitive function based on their physical and mental health status, as well as their environmental backgrounds.

Comparative effectiveness of interventions for cancer treatment-related cognitive impairment in adult cancer survivors: protocol for a systematic review

BACKGROUND

Cancer treatment-related cognitive impairment (CTRCI) can substantially reduce the quality of life of cancer survivors. Many treatments of CTRCI have been evaluated in randomized controlled trials (RCTs), including psychological interventions, pharmacologic interventions, and other therapies. There is a pressing need to establish the benefits and harms of previously studied CTRCI treatments. The proposed systematic review and network meta-analyses will assess the relative efficacy and safety of competing interventions for the management of CTRCI.

METHODS

In consultation with the review team, an experienced medical information specialist will draft electronic search strategies for MEDLINE®, Embase, CINAHL, PsycINFO, and the Cochrane Trials Registry. We will seek RCTs of interventions for the treatment of CTRCI in adults with any cancer, except cancers/metastases of the central nervous system. Due to the anticipated high search yields, dual independent screening of citations will be expedited by use of an artificial intelligence/machine learning tool. The co-primary outcomes of interest will be subjective and objective cognitive function. Secondary outcomes of interest will include measures of quality of life, mental and physical health symptoms, adherence to treatment, and harms (overall and treatment-related harms and harms associated with study withdrawal), where feasible, random-effects meta-analyses and network meta-analyses will be pursued. We will address the anticipated high clinical and methodological heterogeneity through meta-regressions, subgroup analyses, and/or sensitivity analyses.

DISCUSSION

The proposed systematic review will deliver a robust comparative evaluation of the efficacy and safety of existing therapies for the management of CTRCI. These findings will inform clinical decisions, identify evidence gaps, and identify promising therapies for future evaluation in RCTs.

Association between Cognitive Function and Physical Function, Frailty, and Quality of Life in Older Breast Cancer Survivors

BACKGROUND

Older cancer survivors in general are at greater risk for cancer-related cognitive impairment (CRCI), yet few studies have explored its association with health outcomes. This study examined the association between subjective and objective measures of cognitive function and physical function, frailty, and quality of life (QoL) among older breast cancer survivors.

MATERIALS AND METHODS

Older breast cancer survivors who reported cognitive concerns completed surveys on patient-reported cognitive function, physical function, frailty, and QoL as well as objective tests of visuospatial working memory and sustained attention. Data were analyzed using descriptive statistics and separate linear regression models.

RESULTS

A total of 219 female breast cancer survivors completed the study. Perceived cognitive abilities were associated with better physical function, frailty, and QoL (p ≤ 0.001) while cognitive concerns were negatively related with these metrics (p ≤ 0.001). Poorer visuospatial working memory and sustained attention were linked to increased frailty (p ≤ 0.001-0.01), whereas poorer sustained attention was associated with poorer physical function (p < 0.01).

CONCLUSIONS

Older breast cancer survivors with perceived cognitive impairment and poorer cognitive performance reported poorer physical functioning, increased frailty, and poorer QoL. These findings underscore the importance of assessing cognitive concerns and their associated outcomes in older breast cancer survivors.

Prevalence and associated factors of chemotherapy-related cognitive impairment in older breast cancer survivors

AIMS

To examine the prevalence and associated factors of chemotherapy-related cognitive impairment (CRCI) in older breast cancer survivors (BCS).

DESIGN

Systematic review.

DATA SOURCES

We searched EMBASE, PubMed, PsychInfo, CINAHL, Cochrance Library, Web of Science, CNKI and SinoMed, without language restrictions, for studies published from the establishment of the database to September 2022.

REVIEW METHODS

Two researchers independently examined the full texts, data extraction and quality assessment, and any discrepancies were resolved through discussion with a third reviewer. Quality of evidence was assessed using the Newcastle-Ottawa Scale and the Agency for Healthcare Research and Quality Scale.

RESULTS

The seven included studies showed that the estimated prevalence of CRCI in older BCS ranged from 18.6% to 27% on objective neuropsychological tests and from 7.6% to 49% on subjective cognitive assessments. The areas most affected were attention, memory, executive functioning and processing speed. CRCI was associated with 10 factors in six categories, including sociodemographic (e.g. age, education level), physiological (e.g. sleep disorders, fatigue and comorbidities), psychological (e.g. anxiety, depression), treatment modalities (e.g. chemotherapy cycles, chemotherapy regimens), genetic (e.g. APOE2, APOE4) and lifestyle factor (e.g. physical inactivity).

CONCLUSION

CRCI is multifactorial and has a relatively high prevalence. However, the results of subjective and objective cognitive examinations were inconsistent, possibly due to variations in tools used to evaluate different definitions of CRCI. Nevertheless, as there are few published studies of older BCS, this conclusion still require verification by well-designed studies in the future.

IMPACT

We found that the prevalence of CRCI in older adults is relatively high and multifactorial, providing evidence for further health care for this population.

NO PATIENT OR PUBLIC CONTRIBUTION

There was no patient or public involvement.

Memory Impairments and Wellbeing in Breast Cancer Patients: A Systematic Review

Breast cancer is one of the most diagnosed cancers among women. Its effects on the cognitive and wellbeing domains have been widely reported in the literature, although with inconsistent results. The central goal of this review was to identify, in women with breast cancer, the main memory impairments, as measured by objective and subjective tools and their relationship with wellbeing outcomes. The systematic literature search was conducted in the PubMed, Scopus, and ProQuest databases. The selected studies included 9 longitudinal and 10 cross-sectional studies. Although some studies included participants undergoing multimodal cancer therapies, most focused on chemotherapy's effects (57.89%; n = 11). The pattern of results was mixed. However, studies suggested more consistently working memory deficits in breast cancer patients undergoing chemotherapy. In addition, some associations have been identified between objective memory outcomes (verbal memory) and wellbeing indicators, particularly depression and anxiety. The inconsistencies in the results could be justified by the heterogeneity of the research designs, objective and subjective measures, and sample characteristics. This review confirms that more empirical evidence is needed to understand memory impairments in women with breast cancer. An effort to increase the homogeneity of study methods should be made in future studies.

Association Between Cardiovascular Disease and Cognitive Dysfunction in Breast Cancer Survivors

BACKGROUND

Breast cancer survivors (BCSs) may have a greater risk for cardiovascular disease (congestive heart failure and hypertension), which in turn, can affect cognitive dysfunction, a frequent, bothersome, and potentially debilitating symptom.

OBJECTIVE

The purpose of this study was to examine the relationship of cardiovascular disease on cognitive function in BCSs.

METHODS

Baseline data from a double-blind randomized controlled trial for cognitive training of BCSs were examined. Early-stage BCS (stages I-IIIA) who were 21 years or older, completed adjuvant therapy (≥6 months), and reported cognitive concerns completed questionnaires and a brief neuropsychological assessment, including tests of memory, attention and working memory, speed of processing, and verbal fluency. Descriptive statistics, Pearson correlation coefficient, and separate linear regression models for each cognitive domain were conducted.

RESULTS

Forty-seven BCSs, who were on average 57.3 (SD, 8.1) years old, were 58% White, and had some college education (75%), completed the study. Furthermore, 44.7% of the BCS had cardiovascular disease (congestive heart failure or hypertension). In linear regression models, cardiovascular disease was significantly related to immediate and delayed memory and attention and working memory ( P < .01-.05).

CONCLUSION

Breast cancer survivors who have cardiovascular disease may also be at a greater risk for cognitive dysfunction post treatment. Results from this study inform both clinical practice and future research, specifically by examining the intersection between cancer, cardiovascular disease (cardiotoxicity), and cognition.

IMPLICATIONS FOR PRACTICE

Nurses should be aware that BCSs with co-occurring cardiovascular disease are at a higher risk for cognitive dysfunction and work within the multidisciplinary team to optimize BCS health and function.

Pre-Surgery Demographic, Clinical, and Symptom Characteristics Associated with Different Self-Reported Cognitive Processes in Patients with Breast Cancer

Cancer related cognitive impairment (CRCI) is a common and persistent symptom in breast cancer patients. The Attentional Function Index (AFI) is a self-report measure that assesses CRCI. AFI includes three subscales, namely effective action, attentional lapses, and interpersonal effectiveness, that are based on working memory, inhibitory control, and cognitive flexibility. Previously, we identified three classes of patients with distinct CRCI profiles using the AFI total scores. The purpose of this study was to expand our previous work using latent class growth analysis (LCGA), to identify distinct cognitive profiles for each of the AFI subscales in the same sample (i.e., 397 women who were assessed seven times from prior to through to 6 months following breast cancer surgery). For each subscale, parametric and non-parametric statistics were used to determine differences in demographic, clinical, and pre-surgical psychological and physical symptoms among the subgroups. Three-, four-, and two-classes were identified for the effective action, attentional lapses, and interpersonal effectiveness subscales, respectively. Across all three subscales, lower functional status, higher levels of anxiety, depression, fatigue, and sleep disturbance, and worse decrements in energy were associated with worse cognitive performance. These and other modifiable characteristics may be potential targets for personalized interventions for CRCI.