Regular physical activity moderates cardiometabolic risk in Alzheimer's caregivers

Factors Associated With Physical Activity in Alzheimer's Disease: A Cross-Sectional Study of Individuals and Their Caregivers

INTRODUCTION

Physical activity (PA) is associated with better outcomes in individuals living with Alzheimer's and related dementia (ADRD). We examined environmental, intra-, and interpersonal correlates of PA for persons living with ADRD.

METHODS

PA (accelerometry), cognitive function, physical function, and sociodemographic factors were collected in adults with ADRD and their caregivers. Spearman's correlations and generalized linear models were used to evaluate factors associated with PA of persons living with ADRD.

RESULTS

Valid data were obtained from 65 pairs of adults living with ADRD (73.6 ± 8.4 years, 39.4% female) and caregivers (69.4 ± 9.4 years, 69.2% female, 93.8% spouse). Moderate-to-vigorous PA (MVPA) and light PA of persons living with ADRD were correlated with upper and lower body strength, aerobic fitness, and agility. MVPA and sedentary time of persons living with ADRD were associated with that of their caregiver.

CONCLUSION

Physical function and caregiver PA may be targets for interventions in those living with ADRD.

Physical activity and its relationship to burden and health concerns in family caregivers of people with dementia

BACKGROUND

Caring for people with dementia (PwD) usually triggers stress and leads to mental and somatic health complaints (SHCs). Physical activity (PA) can provide burden relief in PwD caregivers, but it is not clear whether PA habits would contribute to reducing SHCs. This study aims to analyze the effect of PA on the relationship between burden and SHCs in a sample of family caregivers of PwD.

METHODS

One hundred and fifty-seven caregivers of PwD reported their PA habits, and completed the Giessen's Subjective Health Complaints Questionnaire (GBB-8) and the Zarit Burden Interview (ZBI). The relationship between PA habits, burden of care (ZBI), and SHCs (B-GBB-8 scale) was examined. Subsequently, the moderating effect of PA habits on the relationship between burden and SHCs was tested.

RESULTS

PA habit was inversely associated with ZBI (rbp  = -0.242) and GBB-8 scores (rbp (Gastrointestinal) = -0.174; rbp (Musculoskeletal) = -0.195; rbp (Exhaustion) = -0.247; rbp (Cardiovascular) = -0.250; and rbp (Overall) = -0.257, respectively), whereas moderate positive correlations were found between ZBI and GBB-8 scores (r (Gastrointestinal) = 0.483; r (Musculoskeletal) = 0.536; r (Exhaustion) = 0.542; r (Cardiovascular) = 0.438; and r (Overall) = 0.598, respectively). The interaction effect of PA habit and burden was significant for the overall SHCs (b = -0.11; P < 0.05) and cardiovascular complaints (b = -0.06; P < 0.05). However, the association between burden and SHCs was significant (P < 0.001) only for sedentary caregivers.

CONCLUSION

These findings indicate that maintaining an active lifestyle through regular PA could potentially help alleviate the adverse effects of caregiver burden on somatic health among caregivers of PwD. Encouraging and endorsing PA interventions for informal caregivers might yield substantial advantages for their health and general well-being.

Understanding the health effects of caregiving stress: New directions in molecular aging

Dementia caregiving has been linked to multiple health risks, including infectious illness, depression, anxiety, immune dysregulation, weakened vaccine responses, slow wound healing, hypertension, cardiovascular disease, metabolic syndrome, diabetes, frailty, cognitive decline, and reduced structural and functional integrity of the brain. The sustained overproduction of proinflammatory cytokines is a key pathway behind many of these risks. However, contrasting findings suggest that some forms of caregiving may have beneficial effects, such as maintaining caregivers' health and providing a sense of meaning and purpose which, in turn, may contribute to lower rates of functional decline and mortality. The current review synthesizes these disparate literatures, identifies methodological sources of discrepancy, and integrates caregiver research with work on aging biomarkers to propose a research agenda that traces the mechanistic pathways of caregivers' health trajectories with a focus on the unique stressors facing spousal caregivers as compared to other informal caregivers. Combined with a focus on psychosocial moderators and mechanisms, studies using state-of-the-art molecular aging biomarkers such as telomere length, p16INK4a, and epigenetic age could help to reconcile mixed literature on caregiving's sequelae by determining whether and under what conditions caregiving-related experiences contribute to faster aging, in part through inflammatory biology. The biomarkers predict morbidity and mortality, and each contributes non-redundant information about age-related molecular changes -together painting a more complete picture of biological aging. Indeed, assessing changes in these biopsychosocial mechanisms over time would help to clarify the dynamic relationships between caregiving experiences, psychological states, immune function, and aging.

Associations between pleasant events, activity restriction, stressors, and blood pressure in caregivers of persons with dementia

OBJECTIVES

Caring for a relative with dementia is associated with adverse consequences for cardiovascular health. Cognitive and behavioral factors, such as high perceived activity restriction and low frequency of pleasant events have been found to be associated with higher levels of blood pressure, but the role these variables play in the stress and coping process remains understudied. The objective of this study is to analyze the associations between behavioral and psychological symptoms of dementia, activity restriction, frequency of pleasant events, and mean arterial pressure.

DESIGN

Face-to-face interviews and cross-sectional analyses.

SETTING

Social services, healthcare centers, and adult day services of Comunidad de Madrid, Spain.

PARTICIPANTS

One hundred and two family caregivers of a spouse or parent with dementia.

MEASUREMENTS

Apart from various sociodemographic and health-related variables, behavioral and psychological symptoms of dementia, activity restriction, and frequency of leisure activities were assessed. In addition, measurement of blood pressure levels was conducted through an electronic sphygmomanometer.

RESULTS

The obtained model suggests that there is a significant indirect association between behavioral and psychological symptoms of dementia and mean arterial pressure through activity restriction and frequency of pleasant events.

CONCLUSIONS

The findings of this study provide preliminary support for a potential indirect effect between behavioral and psychological symptoms of dementia and blood pressure, through the effects of behavioral and psychological symptoms of dementia on the caregivers' levels of activity restriction and frequency of pleasant activities. Our manuscript provides additional support for the pleasant events and activity restriction model (Mausbach et al., 2011; Chattillion et al., 2013), by highlighting the importance of considering caregiving stressors as a source of caregivers' activity restriction in the theoretical framework of the model.

Cardiovascular Disease Incidence and Risk in Family Caregivers of Adults With Chronic Conditions: A Systematic Review

BACKGROUND

Family caregivers experience psychological distress or physical strain that may lead to an increased risk of cardiovascular disease (CVD) morbidity and mortality.

OBJECTIVE

This systematic review aimed to describe the current evidence and gaps in the literature on measures used to assess CVD outcomes in family caregivers, the association of caregiving with CVD incidence/risk outcomes, and associated factors in family caregivers of patients with chronic disease.

METHODS

Medline, PubMed, CINAHL, Web of Science, and Google Scholar were searched for English-language, peer-reviewed studies published from 2008 to 2020 that examined CVD incidence and risk among family caregivers of adults with chronic conditions.

RESULTS

Forty-one studies were included in this review. The measures used to assess CVD risk were categorized into biochemical, subclinical markers, components of metabolic syndrome, and global risk scores. Compared with noncaregivers, caregivers were more likely to have higher CVD incidence rates and objectively measured risk. Cardiovascular disease risks were also increased by their caregiving experience, including hours/duration of caregiving, caregivers' poor sleep status, psychological symptoms, poor engagement in physical/leisure activities, and care recipient's disease severity.

CONCLUSIONS

Although there were limited longitudinal studies in caregivers of patients with diverse health conditions, we found evidence that caregivers are at high risk of CVD. Further research for various caregiver groups using robust methods of measuring CVD risk is needed. Caregiver factors should be considered in developing interventions aimed at reducing CVD risk for caregivers.

COMT Val158Met Polymorphism, Cardiometabolic Risk, and Nadir CD4 Synergistically Increase Risk of Neurocognitive Impairment in Men Living With HIV

OBJECTIVE

The Val allele of the Val158Met single-nucleotide polymorphism of the catechol-o-methyltransferase gene (COMT) results in faster metabolism and reduced bioavailability of dopamine (DA). Among persons living with HIV, Val carriers display neurocognitive deficits relative to Met carriers, presumably due to exacerbation of HIV-related depletion of DA. COMT may also impact neurocognition by modulating cardiometabolic function, which is often dysregulated among persons living with HIV. We examined the interaction of COMT, cardiometabolic risk, and nadir CD4 on neurocognitive impairment (NCI) among HIV+ men.

METHODS

Three hundred twenty-nine HIV+ men underwent COMT genotyping and neurocognitive and neuromedical assessments. Cohort-standardized z scores for body mass index, systolic blood pressure, glucose, triglycerides, and high-density lipoprotein cholesterol were averaged to derive a cardiometabolic risk score (CMRS). NCI was defined as demographically adjusted global deficit score of ≥0.5. Logistic regression modeled NCI as a function of COMT, CMRS, and their interaction, covarying for estimated premorbid function, race/ethnicity, and HIV-specific characteristics. Follow-up analysis included the 3-way interaction of COMT, CMRS, and nadir CD4.

RESULTS

Genotypes were 81 (24.6%) Met/Met, 147 (44.7%) Val/Met, and 101 (30.7%) Val/Val. COMT interacted with CMRS (P = 0.02) such that higher CMRS increased risk of NCI among Val/Val [odds ratio (OR) = 2.13, P < 0.01], but not Val/Met (OR = 0.93, P > 0.05) or Met/Met (OR = 0.92, P > 0.05) carriers. Among Val/Val, nadir CD4 moderated the effect of CMRS (P < 0.01) such that higher CMRS increased likelihood of NCI only when nadir CD4 <180.

DISCUSSION

Results suggest a tripartite model by which genetically driven low DA reserve, cardiometabolic dysfunction, and historical immunosuppression synergistically enhance risk of NCI among HIV+ men, possibly due to neuroinflammation and oxidative stress.

Factors associated with the risk of cardiovascular disease in family caregivers of people with dementia: a systematic review

Objective

This study aimed to systematically review studies that reported factors associated with the risk of cardiovascular disease (CVD) in family caregivers of people with dementia (PWD).

Methods

Literature was searched in PubMed, Medline, CINAHL, and PsycINFO using keywords generated from the terms “dementia”, “caregiver”, and “cardiovascular disease”. We included studies that examined factors associated with CVD risk in family caregivers of PWD, those with longitudinal or cross-sectional study designs, and those published in English.

Results

A total of 34 studies were included in this review. Stress and depressive symptoms, pleasant leisure activity, coping self-efficacy and coping strategy, physical activity, and social support were the main modifiable associated factors of CVD risk in family caregivers of PWD. However, the association between sleep and CVD risk was unclear. Caregiving status, the duration of caregiving, genes, and race, were the main non-modifiable associated factors of CVD risk in family caregivers.

Conclusion

This review showed seven modifiable factors of CVD risk. In particular, leisure activities, physical activity, and social support were significantly negatively associated with the risk of CVD. Researchers and clinical professionals are recommended to consider these risk factors when they develop interventions to reduce CVD risk in family caregivers of PWD.

Caregiver Psychological Distress: Longitudinal Relationships With Physical Activity and Diet

Given limited longitudinal research with caregivers (CGs, n = 122) of spouses with Alzheimer disease, and demographically matched noncaregivers (NCGs, n = 117), we compared these groups on psychological distress (anxiety, depression), burden, and health behaviors over 2 years. Analyses examined group differences in relationships of micronutrient recommended daily allowances (RDAs) and physical activity considering hours of care, psychological distress, and burden. Participants were measured and assessed on whether they met micronutrient intake and physical activity totaled over an average week. Regression analyses showed a total effect whereby NCGs had greater increases in meeting micronutrient allowances (RDAs) than CGs (b = 10.91, standard error [SE] = 4.74, 95% confidence interval [CI]: 1.56-20.26). Additionally, over time, NCGs had greater increases in physical activity, which was mediated by hours of care (b = 0.149, SE = 0.060, 95% CI: 0.034-0.270). These results suggest CGs may lack proper nutrients, and care hours may influence their health behaviors.

Prevalence of Physical Inactivity and Associated Factors Among Older Caregivers of Older Adults

OBJECTIVE

The aim of this study is to analyze the prevalence of physical inactivity (PI) and associated factors in older caregivers of older adults.

METHOD

A cross-sectional study was conducted including 312 older caregivers. Sociodemographic, clinical, and care-related characteristics were considered the independent variables for the determination of associated factors with PI in the logistic regression model.

RESULTS

The prevalence of PI was 75.3% (95% confidence interval [CI] = [70.1%, 80.0%]). The following factors were associated with PI: being female (odds ratio [OR] = 2.8, 95% CI = [1.3, 5.9]), being older than 75 years of age (OR = 7.1, 95% CI = [2.2, 22.9]), not having a marital life (OR = 4.2, 95% CI = [1.1, 15.8]), being prefrail (OR = 6.2, 95% CI = [1.7, 21.9]), and being frail (OR = 14.8, 95% CI = [3.8, 57.7]).

DISCUSSION

The prevalence of PI was high and associated with the female sex, an advanced age, and not being married. Specific public policies considering these results should be created for older caregivers.

[Dependent relative: Effects on family health]

OBJETIVES

The purpose of this work is to analyse the effects on informal caregiver's health and lifestyle when living with a dependent person at home. A comparison will be made between this situation and other situations involving commitment of time and energy, taking into account gender and age differences in each stage of the life cycle.

DESIGN

Cross-sectional study analysing secondary data.

SETTING

The method used for collecting information is the computer assisted personal interview carried out in selected homes by the Ministry of Health, Social Services and Equality.

PARTICIPANTS

The study included 19,351 participants aged over 25 years who completed the 2011-2012 Spanish National Health Survey.

MAIN MEASUREMENTS

This research is based on demographic information obtained from a Spanish National Health Survey (2011/12). Using an empirical framework, the Logit model was select and the data reported as odds ratio. The estimations were repeated independently by sub-groups of age and gender.

RESULTS

The study showed that the health of people who share their lives with a dependent person is worse than those who do not have any dependent person at home (they are 5 times at higher risk of developing health problems). The study found that being a woman, advance age, low educational level and does not work, also has an influence. Being a caregiver reduces the likelihood of maintaining a healthy lifestyle through physical exercise, relaxation, or eating a balanced diet.

CONCLUSIONS

Living with a dependent person reduces the likelihood of maintaining healthy lifestyles and worsens the state of health of family members. Significant differences in gender and age were found.

Comparing the Effect of a Moderate Physical Activity Intervention on the Mental Health Outcomes of African American and Caucasian Dementia Family Caregivers: A Secondary Data Analysis

Increased attention to the effects of the stressful demands of caregiving on the mental health of dementia caregivers has resulted in the development of numerous interventions. The current study is a secondary analysis of a randomized controlled trial that tested a 12-month moderate physical activity intervention with dementia caregivers. Our secondary data analysis examined racial differences in caregiver mental health outcomes including subjective burden, depressive symptoms, and positive affect, as well as differences in physical activity. A total of 211 community-dwelling dementia family caregivers were randomly assigned to a 12-month Enhanced Physical Activity (treatment) Intervention (EPAI) or a Caregiver Skill Building (control) Intervention (CSBI). Of these, 34 African American and 80 Caucasian caregivers completed the study. At baseline, race was associated with subjective burden and positive affect, but not with depressive symptoms. Post intervention (12 months), there were no racial differences in subjective burden or depressive symptoms. However, race was significantly associated with decreased positive affect (p = 0.003) and decreased total minutes of physical activity (p = 0.012). Findings suggest that the mental health needs of African American caregivers warrant additional exploration, where physical activity may be of benefit. These findings provide a cultural perspective to consider during intervention development for future nurse-driven research.

A systematic review of the psychobiological burden of informal caregiving for patients with dementia: Focus on cognitive and biological markers of chronic stress

As the physiological impact of chronic stress is difficult to study in humans, naturalistic stressors are invaluable sources of information in this area. This review systematically evaluates the research literature examining biomarkers of chronic stress, including neurocognition, in informal dementia caregivers. We identified 151 papers for inclusion in the final review, including papers examining differences between caregivers and controls as well as interventions aimed at counteracting the biological burden of chronic caregiving stress. Results indicate that cortisol was increased in caregivers in a majority of studies examining this biomarker. There was mixed evidence for differences in epinephrine, norepinephrine and other cardiovascular markers. There was a high level of heterogeneity in immune system measures. Caregivers performed more poorly on attention and executive functioning tests. There was mixed evidence for memory performance. Interventions to reduce stress improved cognition but had mixed effects on cortisol. Risk of bias was generally low to moderate. Given the rising need for family caregivers worldwide, the implications of these findings can no longer be neglected.

Grau de sobrecarga dos cuidadores de idosos atendidos em domicílio pela Estratégia Saúde da Família

RESUMO Objetivou-se conhecer as características sociodemográficas, de saúde e o grau de sobrecarga dos cuidadores de idosos atendidos em domicílio pela Estratégia Saúde da Família de Sobral (CE). Pesquisa de abordagem quantitativa do tipo descritiva, foram entrevistados 60 cuidadores de idosos e utilizou-se a escala de Zarit. Os cuidadores são de todas as idades, inclusive tendo mais de 60 anos (26,7%); do sexo feminino (90%); portadores de hipertensão (33,3%) e diabetes (16,7%); e apresentam sobrecarga leve (81,7%). Identificou-se a existência de idosos cuidando de idosos e fragilidade nas ações de apoio às famílias, necessitando de novas estratégias de cuidado e do direcionamento de políticas.

Effect of Moderate to Vigorous Physical Activity Intervention on Improving Dementia Family Caregiver Physical Function: A Randomized Controlled Trial

OBJECTIVE

Alzheimer's disease and related dementias (ADRD) affect more than five million Americans and their family caregivers. Caregiving creates challenges, may contribute to decreased caregiver health and is associated with $9.7 billion of caregiver health care costs. The purpose of this 12 month randomized clinical trial (RCT) was to examine if the Enhancing Physical Activity Intervention (EPAI), a moderate to vigorous physical activity (MVPA) treatment group, versus the Caregiver Skill Building Intervention (CSBI) control, would have greater: (1) MVPA adherence; and (2) physical function.

METHODS

Caregivers were randomly assigned to EPAI or CSBI (N=211). MVPA was assessed using a self-report measure; and physical function was objectively assessed using two measures. Intention-to-treat analyses used descriptive, categorical and generalized estimating equations (GEE), with an exchangeable working correlation matrix and a log link, to examine main effects and interactions in change of MVPA and physical function over time.

RESULTS

At 12 months, EPAI significantly increased MVPA (p=<0.001) and number of steps (p=< .01); maintained stable caregiving hours and use of formal services; while CSBI increased hours of caregiving (p=<0.001) and used more formal services (p=<0.02). Qualitative physical function data indicated that approximately 50% of caregivers had difficulties completing physical function tests.

CONCLUSION

The EPAI had a stronger 12 month effect on caregiver MVPA and physical function, as well as maintaining stability of caregiving hours and formal service use; while CSBI increased caregiving hours and use of formal services. A study limitation included greater EPAI versus CSBI attrition. Future directions are proposed for dementia family caregiver physical activity research.

A Nonrandomized Trial of Progressive Resistance Training Intervention in Women With Polycystic Ovary Syndrome and Its Implications in Telomere Content

BACKGROUND

Physical activity is known to relieve the metabolic complications of polycystic ovary syndrome (PCOS), and exercise is also associated with telomere biology. We investigated the changes induced by progressive resistance training (PRT) in telomere content and metabolic disorder in women with PCOS and controls.

PARTICIPANTS AND METHODS

Forty-five women with PCOS and 52 healthy women aged 18 to 37 years were submitted to PRT. A linear periodization of PRT was prepared based on a trend of decreasing volume and intensity throughout the training period. The volunteers performed PRT 3 times a week for 4 months. The participants' physical characteristics and hormonal concentrations were measured before and after PRT, as telomere content that was measured using quantitative real-time polymerase chain reaction.

RESULTS

Briefly, Progressive resistance training reduced waist circumference, body fat percentage, plasma testosterone and sex hormone-binding globulin concentrations, glycemia, and free androgen index. Fasting insulin and insulin resistance index were greater in women with PCOS. Androstenedione and homocysteine increased after PRT. There were no differences in telomere content between controls (0.96 ± 0.3 before vs 0.85 ± 0.21 after) and women with PCOS (0.94 ± 0.33 before vs 0.88 ± 0.39 after). Adjusted analysis showed telomere shortening after PRT in all women (0.95 ± 0.31 before vs 0.86 ± 0.31 after; P = .03). In women with PCOS, increased homocysteine levels were related to telomere reduction and increased androstenedione was positively correlated with telomere content after PRT.

CONCLUSIONS

Progressive resistance training had positive effects on the hormonal and physical characteristics of women with PCOS and controls, but telomere content was reduced and homocysteine level increased in all participants.

Does physical activity reduce burden in carers of people with dementia? A literature review

OBJECTIVES

Physical exercise has been associated with a range of positive outcomes including improvements in psychological well-being. The aim of the present study was to review current evidence on the effects of physical activity interventions for carers of people with dementia.

METHODS

Systematic review. We searched electronic databases and key articles of studies that have evaluated the effectiveness of physical activity interventions in improving psychological well-being in carers of people with dementia. Relevant papers were scored according to established criteria set by the Cochrane Review Group. Selection criteria for studies were a randomized controlled trial (RCT) design, and comparing physical activity with a control group receiving no specific physical activity intervention. Two reviewers worked independently to select trials, extract data, and assess risk of bias.

RESULTS

A total of four RCTs met the inclusion criteria. Studies evaluated home-based supervised physical activity of low to moderate intensity, which included either aerobic exercise, or endurance training.Pooled data showed that physical activity reduced subjective caregiver burden in carers, standardized mean difference -0.43; 95% confidence interval (CI) -0.81 to -0.04, in comparison to a control group of usual care.

CONCLUSIONS

There is evidence from two RCTs that physical activity reduces subjective caregiver burden for carers of people with dementia. Although statistically significant, the observed benefits should be interpreted with caution as the studies conducted so far have limitations. Further high-quality trials are needed for evaluating the effectiveness of physical activity in improving psychological well-being in carers of people with dementia.

Physiological and functional consequences of caregiving for relatives with dementia

BACKGROUND

Chronic stress negatively affects health and well-being. A growing population of informal dementia caregivers experience chronic stress associated with extraordinary demands of caring for a relative with dementia. This review summarizes physiological and functional changes due to chronic dementia caregiver stress.

METHODS

A literature search for papers assessing effects of dementia caregiving was conducted focusing on publications evaluating differences between caregivers and non-caregivers in objective measures of health and cognition.

RESULTS

The review identified 37 studies describing data from 4,145 participants including 749 dementia caregivers and 3,396 non-caregiver peers. Objective outcome measures affected in dementia caregivers included markers of dyscoagulation, inflammation, and cell aging as well as measures of immune function, sleep, and cognition. Though diverse in designs, samples, and study quality, the majority of the studies indicated increased vulnerability of dementia caregivers to detrimental changes in health and cognition. Demographic and personality characteristics moderating or mediating effects of chronic stress in caregivers were also reviewed.

CONCLUSIONS

There is accumulating evidence that chronic dementia caregiver stress increases their vulnerability to disease and diminishes their ability to provide optimal care. Clinicians and society need to appreciate the extent of deleterious effects of chronic stress on dementia caregiver health.

Physical activity program for patients with dementia and their relative caregivers: randomized clinical trial in Primary Health Care (AFISDEMyF study)

BACKGROUND

The aging of the population has led to the increase of chronic diseases, especially dementia and cardiovascular diseases, and it has become necessary for their relatives to dedicate more time in caregiving.The objective in the first phase of this study is to evaluate the effectiveness of a Primary Health Care procedure to increase the physical activity of people with dementia and their relative caregivers. Also the effect on the cognitive state and cardiovascular risk will be assessed.

METHODS/DESIGN

DESIGN

Clinical, multicentric and randomized trial. A simple random sampling to select 134 patients diagnosed with dementia will be carried out. After contacting their relatives, his/her participation in the trial will be requested. A basal assessment will be made and the participants will be asigned to control or intervention group (1:1).

VARIABLES

The main measure will be the assessment of physical activity (podometer and 7-PAR) in patients and caregivers. In patients with dementia: ADAS-cog, functional degree and cardiovascular risk. In caregivers: cardiovascular risk, general health and quality of life.

INTERVENTION

For 3 months, participants will receive instructions to do physical activity with an adapted program. This program will be designed and applied by Primary Health Care professionals in patients with dementia and their caregivers. The control group will receive regular care.

ANALYSIS

An intention-to-treat analysis will be carried out by comparing the observed differences between basal, 6 and 12 months measures. Change in the mean of daily steps assessed with the podometer and 7-PAR will be the main result.

DISCUSSION

If the main hypothesis is confirmed, it could be useful to improve the cognitive state of patients with dementia, as well as the cardiovascular risk of all of them. The results can be good to improve technical features of the devices that register the physical activity in the patients with dementia, and it could facilitate its commercialization.

TRIAL REGISTRATION

Clinical Trials.gov Identifier: NCT02044887.

Physical activity and psychosocial and mental health of older caregivers and non-caregivers

Few studies have been conducted on physical activity (PA) in older caregivers, a population at risk for mental and physical decline. To assess and compare PA, PA preferences, psychosocial determinants of PA, and mental health indicators between older non-exercising caregivers and non-caregivers. Caregivers (N = 24) and non-caregivers (N = 48) completed questionnaires and wore an accelerometer for 7 consecutive days. Few significant differences were noted in objectively measured or subjectively reported PA between caregivers and non-caregivers. Non-caregivers reported greater social support to exercise from family members. Caregivers reported significantly greater anxiety, depression, stress, and negative health symptoms. Caregivers were significantly more likely to prefer exercise in 10-min bouts. Caregivers are in need of interventions to increase PA and health. Efforts to help caregivers participate in multiple shorter bouts of exercise during the day could be more effective than recommending one continuous 30-minute bout.

Effect of chronic dementia caregiving and major transitions in the caregiving situation on kidney function: a longitudinal study

OBJECTIVE

To estimate the glomerular filtration rate (GFR) in relation to the chronic stress of dementia caregiving and major transitions in the caregiving situation.

METHODS

We longitudinally assessed 119 people serving as caregivers for their spouses with Alzheimer's disease and 58 noncaregiving controls for a period of up to 3 years (mean of 2.8 assessments per participant). At baseline, the mean (standard deviation [SD]) age of all participants was 74.5 (7.5) years. Random regression models with fixed and time-variant effects for psychosocial factors, risk factors of chronic kidney disease, and caregiving transitions were used to evaluate changes over time in estimated GFR.

RESULTS

The change in GFR did not differ between caregivers and controls during follow-up (p = .77). Further analyses revealed that GFR declined disproportionately after placement of the spouse in a nursing home at 3 months after placement (-4.9 [2.2] mL/min per 1.73 m(2); p = .03). Post hoc analyses showed that this effect was stronger in caregivers with hypertension compared with those without hypertension (-5.7 [3.1] versus -2.4 [3.4] mL/min per 1.73 m(2)), as well as in caregivers with diastolic blood pressure (BP) levels at 1 SD above the mean than in those with diastolic BP levels at 1 SD below the mean (-8.3 [2.9] versus -1.4 [2.7] mL/min per 1.73 m(2)).

CONCLUSIONS

Kidney function did not differ between caregivers and controls over time. However, GFR had impaired at 3 months after a major caregiving transition. Because the effect of placement of the spouse with Alzheimer's disease on the decline in GFR was moderated by BP, it might be confined to caregivers who experience increased sympathetic activation after placement.

Effect of Alzheimer caregiving on circulating levels of C-reactive protein and other biomarkers relevant to cardiovascular disease risk: a longitudinal study

BACKGROUND

Providing care to a spouse with Alzheimer's disease (AD) may contribute to cardiovascular disease (CVD). The acute phase reactant C-reactive protein (CRP) is a well-established biomarker of an increased CVD risk.

OBJECTIVE

To investigate the hypothesis that dementia caregiving is associated with elevated circulating levels of CRP and possibly other biomarkers of CVD risk.

METHODS

We examined 118 elderly spousal Alzheimer caregivers and 51 noncaregiving controls about once a year for up to 3 years. Random regression models with fixed and time-variant effects for a range of covariates known to affect biomarker levels were used to evaluate changes in CRP and in 12 additional measures of inflammation, cellular adhesion, endothelial function, and hemostasis in relation to caregiving status, years of caregiving, and major transitions in the caregiving situation.

RESULTS

During the study period, longer duration of caregiving was associated with elevated CRP levels (p = 0.040) and caregivers showed greater tumor necrosis factor (TNF)-α levels than controls (p = 0.048). Additionally, 3 months after the death of the AD spouse, caregivers showed a significant drop in CRP levels (p = 0.003) and levels of soluble intercellular adhesion molecule (sICAM)-1 (p = 0.008).

CONCLUSION

Duration of caregiving and being a caregiver per se were both associated with chronic low-grade inflammation as indicated by elevated CRP and TNF-α levels, respectively. Conversely, death of the AD spouse was associated with lower CRP and sICAM-1 levels. The findings indicate that chronic caregiving of those with dementia may result in increased inflammation and, thereby, possibly increased CVD risk.

Cardiometabolic effects in caregivers of nursing home placement and death of their spouse with Alzheimer's disease

OBJECTIVES

To test the hypothesis that cardiometabolic risk is attenuated when caregivers are relieved of caregiving stress when the caregiving recipient transitions out of the home.

DESIGN

Longitudinal.

SETTING

Participants' homes.

PARTICIPANTS

One hundred nineteen spousal caregivers of a patient with Alzheimer's disease (AD) and 55 noncaregiving controls (mean age of entire sample 75 ± 8, 68% women).

MEASUREMENTS

Participants underwent up to three yearly assessments of metabolic syndrome (MetS) factors related to adiposity, dyslipidemia, hypertension, and hyperglycemia. Changes in the total number of MetS factors (range: 0-5) 3 months after caregiver transitions were evaluated using random regression models with fixed and time-variant effects for sociodemographic and health-related covariates.

RESULTS

Caregivers had a greater number of MetS factors over time than noncaregivers (1.78 ± 0.13 vs 1.36 ± 0.18, P = .008), which, after the death of the spouse, dropped by 0.46 ± 0.16 (P = .003) being no longer different from those of noncaregivers; this effect was most prominently related to decreases in triglycerides (-22.2 ± 11.0 mg/dL, P = .03), systolic blood pressure (-6.2 ± 2.6 mmHg, P = .02), and diastolic blood pressure (-3.4 ± 1.5 mmHg, P = .03). Placement of the spouse decreased the number of MetS factors only in caregivers with lower levels of depressive symptoms (-0.48 ± 0.18, P = .01) and sleeping difficulties (-0.42 ± 0.18, P = .02) but not in caregivers with higher levels in these measures at postplacement.

CONCLUSION

High cardiometabolic risk in caregivers decreased to the level of that of noncaregivers within 3 months of death of the spouse with AD, although placement, a transition in the course of dementia caregiving, did not benefit cardiovascular health in highly distressed caregivers.