Relationship of severity of dementia to caregiving stressors

The dyadic interaction of relationships and disability type on informal carer subjective well-being

PURPOSE

Care-related factors have frequently been associated with elevated levels of distress and diminished subjective well-being. However, these variables have traditionally been considered independently. The objectives of this study were to explore the subjective well-being of informal carers in Australia and to specifically examine the effect of the dyadic interaction between the caring relationship and type of disability on the subjective well-being of informal carers.

METHODS

Informal carers (n = 4,096) completed the Personal Wellbeing Index (PWI) and Depression and Stress Scales. Analysis of covariance was used to compare the subjective well-being of carers to the general population while controlling for socio-demographic factors. To examine the dyadic relationship, a multivariate analysis of covariance was employed.

RESULTS

After socio-demographic variables were controlled, informal carers reported significantly lower PWI scores compared to the general population. The results of the multivariate analysis of covariance revealed a significant interaction between the caring relationship and the type of disability being managed on subjective well-being. No differences were found for symptoms of depression and stress.

CONCLUSIONS

The findings of this study imply that the detrimental effect of caring on subjective well-being is magnified for carers who support a child with a mental illness or multiple types of disabilities. These carers displayed the lowest levels of subjective well-being, highlighting the dyadic effects of care-related variables. Consideration of these factors is essential to target effective intervention programs for those most at risk of diminished well-being.

The 3-phase-model of dyadic adaptation to dementia: why it might sometimes be better to be worse

In the next years and decades, the number of old spousal dyads having to deal with the onset and progression of dementia in one partner will increase significantly. Existing research indicates that caregiving for an ill spouse is related to decreased caregiver well-being and high levels of caregiver stress. In this theoretical paper, we argue that three aspects deserve additional theoretical and empirical attention: (a) Some spousal caregivers seem to exhibit stable pattern of individual well-being, (b) dyads may be able to adapt their ways of supporting each other to maintain a maximum of dyadic autonomy, and (c) the progression of the dementia increasingly compromising the individual autonomy is likely to require different behaviors and skills of the dyad to achieve high levels of dyadic well-being. We suggest a 3-phase-model of dyadic adaptation to dementia-related losses of patients' individual autonomy and discuss adaptive processes in three phases of dementia that may allow stable levels of well-being in caregivers over time. Thereby, our model can integrate existing findings and theories and allows deriving areas of future research.

IDE Gene Polymorphism Influences on BPSD in Mild Dementia of Alzheimer's Type

Insulin degrading enzyme (IDE) degrades amyloid beta (Abeta), which may inhibit the accumulation of Abeta in a brain affected with dementia of Alzheimer's type (DAT). A decrease in the activity of IDE results in changes in glucose utilization in the brain, which could affect the cognitive and psychiatric symptoms of DAT. We investigated a possible association of IDE gene polymorphism and the behavioral and psychological symptoms of dementia (BPSD) in mild DAT. The genotyping for IDE and apolipoprotein E (ApoE) was determined in 207 patients with mild DAT and 215 controls. The occurrence of BPSD was demonstrated using the Behavioral Pathology in Alzheimer's Disease Rating Scale (BEHAVE-AD). IDE gene polymorphism is unlikely to play a substantial role in conferring susceptibility to DAT, but it may be involved in the development of affective disturbance through the course of mild DAT, regardless of the presence of an ApoE epsilon4 allele. The present data could be the result of a small sample size. Further investigations using larger samples are thus required to clarify the correlation between IDE gene polymorphism, susceptibility to DAT, and emergence of BPSD.

Burden of delayed admission to psychogeriatric nursing homes on patients and their informal caregivers

OBJECTIVE

To assess the deleterious effects of waiting for admission to a nursing home on the state of health of patients and their informal caregivers, and on the burden of caring.

DESIGN AND PARTICIPANTS

Prospective longitudinal study consisting of interviews with informal caregivers during the period on the waiting list and after admission of the patient to a nursing home. Analysis of patients' files on diagnosis, date of registration on the waiting list, and date of admission to nursing home.

SETTING

Ninety three patients registered on waiting lists for admission to a psychogeriatric nursing home in two regions of Amsterdam.

RESULTS

Seventy eight of the 93 patients were admitted to a nursing home. The burden on the caregivers declined after admission of the patient but depressive symptoms did not. After 6 months a subgroup of 19 caregivers whose relatives were still waiting to be admitted were interviewed. The health of these patients remained stable during this waiting period and only problems in activities of daily living increased. The burden on these 19 informal caregivers and their state of health remained stable during the waiting period.

CONCLUSIONS

A decline in the state of health and a rise in the burden on caregivers during the waiting period did not occur. However, a decrease in the burden and an improvement in mental health could have started earlier if patients had been admitted earlier.

The mental health of informal caregivers in Ontario: an epidemiological survey

OBJECTIVES

This study describes the mental health status, disability, physical health, and mental health service utilization of informal care-givers under the age of 65 in the province of Ontario.

METHODS

The study analyzed data collected in the 1991 province-wide, population-based mental health supplement to the Ontario Health Survey. Diagnoses from the Diagnostic and Statistical Manual of Mental Disorders, 3rd edition, revised, were generated on the basis of a structured diagnostic interview. Caregivers and noncaregivers are compared here on past-year prevalence of psychiatric disorder, physical illness, disability, and utilization of mental health services. The possible confounding effects of age, sex, employment status, and economic disadvantage are explored.

RESULTS

Informal caregivers (n = 1219) constituted 15.0% of the sample. Caregivers had higher rates of affective (6.3% vs 4.2%) and anxiety (17.5% vs 10.9%) disorders than noncaregivers and used health services for mental health problems at nearly twice the rate.

CONCLUSIONS

Documentation of the prevalence of caregiving and the increased prevalence of psychiatric disorders, disability, and service utilization among caregivers is of critical importance as governments continue to move toward community-based care. To accomplish this goal, the needs of caregivers must be acknowledged and met by the establishment of appropriate and readily accessible support services.

Stability and change in psychosocial resources during caregiving and bereavement in partners of men with AIDS

This study examines the effects of caregiving and bereavement on psychosocial resources in HIV+ and HIV- caregivers of men with AIDS. We explored three hypotheses regarding these effects: the "wear and tear" hypothesis, which asserts that the chronic stress of caregiving and bereavement diminishes resources; the "enhancement" hypothesis, which asserts that caregiver resources may increase in response to increased demands; and the "personality" hypothesis, which asserts that psychosocial resources reflect stable personality characteristics. We addressed four questions: (a) What are the effects of caregiving on resources? (b) How do these resources vary by the imminence of the partner's death? (c) What is the effect of the partner's death on these resources? and (d) How does the caregivers' HIV serostatus influence the effects of caregiving and bereavement on resources? Support for the personality hypothesis predominated, with some support for the wear and tear hypothesis, depending on the resource in question. In general, HIV seropositivity did not put people at additional risk for resource depletion.

Dementia and subnormal levels of vitamin B12: effects of replacement therapy on dementia

Routine determination of serum vitamin B12 levels is generally recommended as part of the screening of demented patients, based on the notion that vitamin B12 deficiency is one of the causes of reversible dementia. We studied the effects of vitamin B12 replacement therapy in a prospective longitudinal study at a memory clinic, with special emphasis on assessment of severity of dementia: not only cognitive deterioration, but also disability in the activities of daily life, behavioural problems, and the burden experienced by the caregiver were examined using instruments of proven validity. In a series of 170 consecutive patients with dementia, subnormal serum vitamin B12 levels were found in 26 cases (15%); all but one fulfilled diagnostic criteria for possible Alzheimer's disease. Cobalamin supplementation was given to all patients and the effect was evaluated after 6 months. When the size and pattern of individual change scores, and the mean change scores on all instruments were taken into account, functioning after replacement therapy was not improved. When change scores of treated patients were compared with those of patients with Alzheimer's disease (n = 69), vitamin B12 replacement did not result in slowing of the progression of dementia. Contrary to widely accepted beliefs, subnormal serum vitamin B12 levels are not a (quantitatively) important cause of reversible dementia.