Assessing the relationship between health utilities, quality of life, and health services use in Alzheimer's disease

Mapping racial and ethnic healthcare disparities for persons living with dementia: A scoping review

INTRODUCTION

We set out to map evidence of disparities in Alzheimer's disease and Alzheimer's disease related dementias healthcare, including issues of access, quality, and outcomes for racial/ethnic minoritized persons living with dementia (PLWD) and family caregivers.

METHODS

We conducted a scoping review of the literature published from 2000 to 2022 in PubMed, PsycINFO, and CINAHL. The inclusion criteria were: (1) focused on PLWD and/or family caregivers, (2) examined disparities or differences in healthcare, (3) were conducted in the United States, (4) compared two or more racial/ethnic groups, and (5) reported quantitative or qualitative findings.

RESULTS

Key findings include accumulating evidence that minoritized populations are less likely to receive an accurate and timely diagnosis, be prescribed anti-dementia medications, and use hospice care, and more likely to have a higher risk of hospitalization and receive more aggressive life-sustaining treatment at the end-of-life.

DISCUSSION

Future studies need to examine underlying processes and develop interventions to reduce disparities while also being more broadly inclusive of diverse populations.

Access to Health Services in Older Minority Ethnic Groups with Dementia: A Systematic Review

BACKGROUND/OBJECTIVES

While it is acknowledged that minority ethnic (ME) groups across international settings face barriers to accessing care for dementia, it is not clear whether ME groups access services less frequently as a result. The objective of this review is to examine whether ME groups have longer delays before accessing dementia/memory services, higher use of acute care and crisis services and lower use of routine care services based on existing literature. We also examined whether ME groups had higher dementia severity or lower cognition when presenting to memory services.

DESIGN

Systematic review with narrative synthesis.

SETTING

Nonresidential medical, psychiatric, memory, and emergency services.

PARTICIPANTS

Twenty studies totaling 94,431 older adults with dementia or mild cognitive impairment.

MEASUREMENTS

We searched Embase, Ovid MEDLINE, Global Health, and PsycINFO from inception to November 2018 for peer-reviewed observational studies which quantified ethnic minority differences in nonresidential health service use in people with dementia. Narrative synthesis was used to analyze findings.

RESULTS

Twenty studies were included, mostly from the U.S. (n = 13), as well as the UK (n = 4), Australia (n = 1), Belgium (n = 1), and the Netherlands (n = 1). There was little evidence that ME groups in any country accessed routine care at different rates than comparison groups, although studies may have been underpowered. There was strong evidence that African American/Black groups had higher use of hospital inpatient services versus U.S. comparison groups. Primary care and emergency services were less well studied. Study quality was mixed, and there was a large amount of variability in the way ethnicity and service use outcomes were ascertained and defined.

CONCLUSION

There is evidence that some ME groups, such as Black/African American groups in the U.S., may use more acute care services than comparison populations, but less evidence for differences in routine care use. Research is sparse, especially outside the U.S.

Caregiver burden, health utilities, and institutional service use in Alzheimer's disease

OBJECTIVE

This study examined the moderating effect of caregiver burden on the relationship between the health status of Alzheimer's disease (AD) patients and their use of institutional services (i.e., hospitalization, nursing home, and residential care).

METHODS

Data were obtained at baseline and at 3, 6, and 9 months following study entry on 421 community-dwelling patients with AD in the Clinical Antipsychotic Trials of Intervention Effectiveness for AD. The outcome variable includes use of any institutional services. Logistic regression was employed to estimate the interaction between Health Utility Index Mark III score (a general health status measure) and four concurrent caregiver burden measures at outcome. Marginal effects were calculated and plotted using random effects models for observations at multiple time points per individual. Average effects were calculated across all observations using models without random effects.

RESULTS

Random effects results suggest that caregiver burden weakens the inverse relationship between health utilities and institutional service use, leading to greater likelihood of institutional use than would be expected at a given level of health. This is indicated by positive and significant signs on the Health Utility Index Mark III*caregiver burden interaction when burden is measured using the Caregiver Distress Scale, Beck Depression Inventory, and Caregiver Assessment Survey (all p < 0.05). It is reinforced by positive and significant average effects deriving from Caregiver Distress and Beck Depression Inventory models without random effects (both p < 0.10). Results derived from the Burden Interview Scale, although positive, were non-significant and weak by comparison.

CONCLUSION

Caregiver support interventions should be offered to individuals caring for less-advanced AD patients. Otherwise, healthy patients may be at increased risk for institutionalization when caregivers experience high levels of burden.

Caregiver burden, health utilities, and institutional service costs among community-dwelling patients with Alzheimer disease

This study examined the moderating effect of caregiver burden on the relationship between patients' health status and institutional costs in Alzheimer disease (AD). Data were obtained on whether 421 community-dwelling patients with AD in the CATIE-AD trial received institutional services in the month preceding baseline and at 3-month, 6-month, and 9-month follow-up. All participants had a caregiver who lived with or visited them regularly. Outcome variables include hospital, nursing home, residential, and combined institutional costs. Mixed models were employed to estimate the interaction of Health Utility Index (HUI)-III scores (a health status measure) and 5 measures of caregiver burden. Wherever significant, results indicate that greater caregiver burden weakens the inverse relationship between health utilities and institutional costs, leading to greater costs than would be expected at a given level of health. Altogether 45.0% of the models (9/20) showed this effect (positive coefficient on the burden-HUI interaction term). Interventions to support caregivers should be based on caregiver burden, regardless of care recipient health status, for even seemingly manageable patients may be at heightened risk for institutionalization if caregivers experience sufficiently high levels of burden.