Health-care use and cost for multimorbid persons with dementia in the National Health and Aging Trends Study

Trends in prevalence of multimorbidity for chronic diseases in China: serial cross-sectional surveys from 2009 to 2018

BACKGROUND

Multimorbidity, individuals suffering from two or more chronic diseases, has become a major health challenge worldwide, especially in populous and prosperous cities, where studies of this phenomenon in China are limited. We examined the prevalence, trends, patterns, and associated factors of multimorbidity from 2009 to 2018 among community-dwelling adults in Guangzhou, China.

METHODS

We conducted serial cross-sectional surveys for chronic diseases in Guangzhou, China, in 2009, 2013, and 2018. General and stratified prevalence were standardized using demographic data. Multivariable logistic regression and hierarchical cluster analysis were applied to identify associated factors and to assess the correlations and patterns of multimorbidity, respectively.

RESULTS

This study included 23,284 adults aged 18 and over in 2009, 18,551 in 2013, and 15,727 in 2018. The standardized prevalence of multimorbidity increased substantially, with 12.69% (95% CI: 10.45-15.33) in 2009, 25.44% (95% CI: 23.47-27.52) in 2013, and 35.13% (95% CI:32.64-37.70) in 2018 (P for trend <0.001). The highest bi- and triple-conditions of multimorbidity were dyslipidemia (DP) and overweight or obesity (OO) (12.54%, 95% CI: 11.68-13.46), and DP, OO, and Hypertension (HT) (3.99%, 95% CI: 3.47-4.58) in 2018. From 2009 to 2018, (1) The majority of multimorbidity patterns showed a high prevalence; (2) The percentage of participants with only one chronic condition was found lower, while the percentage with multiple conditions was higher.

CONCLUSIONS

The prevalence of chronic disease multimorbidity in Guangzhou China, has increased substantially among adults. Effective policies targeting multimorbidity are urgently needed, especially for the health management of primary medical institutions.

Unraveling the multiple chronic conditions patterns among people with Alzheimer's disease and related dementia: A machine learning approach to incorporate synergistic interactions

INTRODUCTION

Most people with Alzheimer's disease and related dementia (ADRD) also suffer from two or more chronic conditions, known as multiple chronic conditions (MCC). While many studies have investigated the MCC patterns, few studies have considered the synergistic interactions with other factors (called the syndemic factors) specifically for people with ADRD.

METHODS

We included 40,290 visits and identified 18 MCC from the National Alzheimer's Coordinating Center. Then, we utilized a multi-label XGBoost model to predict developing MCC based on existing MCC patterns and individualized syndemic factors.

RESULTS

Our model achieved an overall arithmetic mean of 0.710 AUROC (SD = 0.100) in predicting 18 developing MCC. While existing MCC patterns have enough predictive power, syndemic factors related to dementia, social behaviors, mental and physical health can improve model performance further.

DISCUSSION

Our study demonstrated that the MCC patterns among people with ADRD can be learned using a machine-learning approach with syndemic framework adjustments.

HIGHLIGHTS

Machine learning models can learn the MCC patterns for people with ADRD. The learned MCC patterns should be adjusted and individualized by syndemic factors. The model can predict which disease is developing based on existing MCC patterns. As a result, this model enables early specific MCC identification and prevention.

Association of Comorbidity With Healthcare Utilization in People Living With Dementia, 2010-2019: A Population-Based Cohort Study

Evidence on the healthcare utilization associated with comorbidity in people with dementia is lacking in Chinese societies. This study aimed to quantify healthcare utilization associated with comorbidity that is common in people living with dementia. We conducted a cohort study using population-based data from Hong Kong public hospitals. Individuals aged 35+ with a dementia diagnosis between 2010 and 2019 were included. Among 88,151 participants, people with at least two comorbidities accounted for 81.2%. Estimates from negative binomial regressions showed that compared to those with one or no comorbid condition other than dementia, adjusted rate ratios of hospitalizations among individuals with six or seven and eight or more conditions were 1.97 [98.75% CI, 1.89-2.05] and 2.74 [2.63-2.86], respectively; adjusted rate ratios of Accident and Emergency department visits among individuals with six or seven and eight or more conditions were 1.53 [1.44-1.63] and 1.92 [1.80-2.05], respectively. Comorbid chronic kidney diseases were associated with the highest adjusted rate ratios of hospitalizations (1.81 [1.74-1.89]), whereas comorbid chronic ulcer of the skin was associated with the highest adjusted rate ratios of Accident and Emergency department visits (1.73 [1.61-1.85]). Healthcare utilization for individuals with dementia differed substantially by both the number of comorbid chronic conditions and the presence of some specific comorbid conditions. These findings further highlight the importance of taking account of multiple long-term conditions in tailoring the care approach and developing healthcare plans for people with dementia.

U.S. dementia care spending by state: 2010-2019

INTRODUCTION

Dementia is the fourth largest cause of death for individuals 70 years of age and older in the United States, and it is tremendously costly. Existing estimates of the indirect costs of dementia are dated and do not report on differences across the United States.

METHODS

We used data from multiple surveys to create cost estimates and projections for informal dementia caregiving at the U.S. state level from 2010 through 2050.

RESULTS

In 2019, the annual replacement cost of informal caregiving was $42,422 per prevalent case, and the forgone wage cost was $10,677 per prevalent case. In 2019, it would have cost $230 billion to hire home health aides to provide all this care. If past trends persist, this cost is expected to grow to $404 billion per year in 2050.

DISCUSSION

The cost of informal care varied substantially by state and is expected to grow through at least 2050.

HIGHLIGHTS

In the United States in 2019, foregone wages due to informal dementia care was $58 billion. Replacing informal dementia care with health aides would have cost $230 billion. These costs vary dramatically by state, even when assessed per prevalent case. These costs are expected to nearly double by 2050.

Multimorbidity and mortality among older patients with coronary heart disease in Shenzhen, China

BACKGROUND

The current understanding of the magnitude and consequences of multimorbidity in Chinese older adults with coronary heart disease (CHD) is insufficient. We aimed to assess the association and population-attributable fractions (PAFs) between multimorbidity and mortality among hospitalized older patients who were diagnosed with CHD in Shenzhen, China.

METHODS

We conducted a retrospective cohort study of older Chinese patients (aged ≥ 65 years) who were diagnosed with CHD. Cox proportional hazards models were used to estimate the associations between multimorbidity and all-cause and cardiovascular disease (CVD) mortality. We also calculated the PAFs.

RESULTS

The study comprised 76,455 older hospitalized patients who were diagnosed with CHD between January 1, 2016, and August 31, 2022. Among them, 70,217 (91.9%) had multimorbidity, defined as the presence of at least one of the predefined 14 chronic conditions. Those with cancer, hemorrhagic stroke and chronic liver disease had the worst overall death risk, with adjusted HRs (95% CIs) of 4.05 (3.77, 4.38), 2.22 (1.94, 2.53), and 1.85 (1.63, 2.11), respectively. For CVD mortality, the highest risk was observed for hemorrhagic stroke, ischemic stroke, and chronic kidney disease; the corresponding adjusted HRs (95% CIs) were 3.24 (2.77, 3.79), 1.91 (1.79, 2.04), and 1.81 (1.64, 1.99), respectively. All-cause mortality was mostly attributable to cancer, heart failure and ischemic stroke, with PAFs of 11.8, 10.2, and 9.1, respectively. As for CVD mortality, the leading PAFs were heart failure, ischemic stroke and diabetes; the corresponding PAFs were 18.0, 15.7, and 6.1, respectively.

CONCLUSIONS

Multimorbidity was common and had a significant impact on mortality among older patients with CHD in Shenzhen, China. Cancer, heart failure, ischemic stroke and diabetes are the primary contributors to PAFs. Therefore, prioritizing improved treatment and management of these comorbidities is essential for the survival prognosis of CHD patients from a holistic public health perspective.

A Systematic Review on Navigation Programs for Persons Living With Dementia and Their Caregivers

BACKGROUND AND OBJECTIVES

System navigation programs are becoming more available to meet the needs of patients with complex care needs. The aim of this review was to systematically assess the outcomes of navigation programs for persons with dementia and their family caregivers.

RESEARCH DESIGN AND METHODS

A systematic review methodology was employed. Ten databases were searched for all relevant articles published until October 30, 2021. English-language full-text articles were included if they focused on implemented navigation program(s) that primarily supported persons with dementia who were aged 50 or older. Methodological quality was assessed by 2 independent raters using the Physiotherapy Evidence Database Scale, the STrengthening the Reporting of OBservational studies in Epidemiology checklist, and the Mixed Methods Appraisal Tool.

RESULTS

Fourteen articles were included in the review. There was Level 1 evidence for the benefits of system navigation programs on delaying institutionalization, wherein benefits appeared to be specific to interventions that had an in-person component. There was Level 1 (n = 4) and Level 3 (n = 1) evidence on service use from time of diagnosis to continued management of dementia. Finally, Level 1 to Level 5 evidence indicated a number of benefits on caregiver outcomes.

DISCUSSION AND IMPLICATIONS

There is strong evidence on the benefits of system navigation for people with dementia on delaying institutionalization and caregiver outcomes, but outcomes across other domains (i.e., functional independence) are less clear, which may be due to the varied approaches within system navigation models of care.

Influence of Care Network Characteristics on Physician Visit Experiences for Black, White, and Hispanic Older Adults With Dementia

OBJECTIVES

Most older adults with dementia are assisted by multiple caregivers, but the relationship of care network structure with health care access and quality is underexamined. We sought to test the associations of care network characteristics with the physician visit experience for older adults with dementia across diverse racial/ethnic groups.

METHODS

We used data on Medicare beneficiaries (aged 65+) with dementia from the National Health and Aging Trends Study (2015-2019) to fit logistic regression models to test associations between physician visit outcomes and (a) size of the potential care network and (b) proportion of potential care network members (PCNMs) currently helping with daily functioning tasks. We also tested for modifications by race/ethnicity.

RESULTS

Hispanic respondents had the largest potential care networks (M = 6.89, standard deviation [SD] = 3.58) and the smallest proportion of PCNMs providing help with daily functioning (M = 29.89%, SD = 22.29). In models adjusted for demographics and dementia classification, both network size and proportional involvement of PCNMs were positively associated with the presence of a PCNM and assistance during the visit. Associations remained significant at 4-year follow-up for the presence of PCNM at the visit and were robust to further adjustments for insurance type, income, and health factors. Associations were not modified by race/ethnicity.

DISCUSSION

Larger networks and a higher proportion of PCNMs providing assistance predicted caregiver presence and assistance at the physician visit but not access to care. Findings suggest that strengthening care networks early in the disease may support improved health care outcomes for persons with dementia across diverse populations.

Association of dementia comorbidities with caregivers' physical, psychological, social, and financial burden

BACKGROUND

Informal caregivers of older adults with dementia may experience substantial burdens during their caregiving process, especially when caring for older adults with other comorbid conditions. This study evaluated whether and how comorbidity burden for persons with dementia (PWD) was associated with caregivers' physical, psychological, social, and financial burden as well as caregiving gain.

METHODS

Data were from 1,065 community-dwelling older adults living with dementia and their primary caregivers in the National Health and Aging Trends Study and the National Study of Caregiving. PWD's comorbidity burden was measured by the count of chronic conditions and the pattern of comorbidity identified by the latent class analysis (LCA). We considered four domains of caregiving burden-physical, psychological, social, and financial burden. We used linear regressions to identify the unadjusted and adjusted associations between PWD's comorbidity burden and caregiving burden and gain.

RESULTS

Of 1,065 PWD, 13.5% had 0-1 and 24.9% had 5 or more number of comorbid chronic conditions, respectively. After multivariable adjustment, an additional chronic condition is associated with an 0.11- and 0.36-point increase in caregivers' physical and psychological burden, respectively. Caregivers of PWD with 5 or more chronic conditions had a 0.64- and 2.22-point higher score of physical and psychological burden, respectively, than those caring for PWD with 0 or 1 comorbid condition. LCA divided PWD into two classes, a high comorbidity class (69.0%) and a low comorbidity class (31.0%). Caregivers of PWD in the high comorbidity burden class had a 0.46-point higher score of physical caregiving burden than those in the low comorbidity burden class. No significant association was found between care recipients' comorbidity burden and their caregivers' social and financial burden or caregiving gain.

CONCLUSIONS

The comorbidity burden of PWD was associated with their caregivers' physical and psychological caregiving burden. Relevant interventions to manage the comorbid conditions of people living with dementia and support their caregivers are crucial to improving their physical health and psychological wellbeing.

Costs of multimorbidity: a systematic review and meta-analyses

BACKGROUND

Multimorbidity is a rising global phenomenon, placing strains on countries' population health and finances. This systematic review provides insight into the costs of multimorbidity through addressing the following primary and secondary research questions: What evidence exists on the costs of multimorbidity? How do costs of specific disease combinations vary across countries? How do multimorbidity costs vary across disease combinations? What "cost ingredients" are most commonly included in these multimorbidity studies?

METHODS

We conducted a systematic review (PROSPERO: CRD42020204871) of studies published from January 2010 to January 2022, which reported on costs associated with combinations of at least two specified conditions. Systematic string-based searches were conducted in MEDLINE, The Cochrane Library, SCOPUS, Global Health, Web of Science, and Business Source Complete. We explored the association between costs of multimorbidity and country Gross Domestic Product (GDP) per capita using a linear mixed model with random intercept. Annual mean direct medical costs per capita were pooled in fixed-effects meta-analyses for each of the frequently reported dyads. Costs are reported in 2021 International Dollars (I$).

RESULTS

Fifty-nine studies were included in the review, the majority of which were from high-income countries, particularly the United States. (1) Reported annual costs of multimorbidity per person ranged from I$800 to I$150,000, depending on disease combination, country, cost ingredients, and other study characteristics. (2) Our results further demonstrated that increased country GDP per capita was associated with higher costs of multimorbidity. (3) Meta-analyses of 15 studies showed that on average, dyads which featured Hypertension were among the least expensive to manage, with the most expensive dyads being Respiratory and Mental Health condition (I$36,840), Diabetes and Heart/vascular condition (I$37,090), and Cancer and Mental Health condition in the first year after cancer diagnosis (I$85,820). (4) Most studies reported only direct medical costs, such as costs of hospitalization, outpatient care, emergency care, and drugs.

CONCLUSIONS

Multimorbidity imposes a large economic burden on both the health system and society, most notably for patients with cancer and mental health condition in the first year after cancer diagnosis. Whether the cost of a disease combination is more or less than the additive costs of the component diseases needs to be further explored. Multimorbidity costing studies typically consider only a limited number of disease combinations, and few have been conducted in low- and middle-income countries and Europe. Rigorous and standardized methods of data collection and costing for multimorbidity should be developed to provide more comprehensive and comparable evidence for the costs of multimorbidity.

Understanding How Older Adults with Communication Difficulties Access Health Services: What We Can Learn from the National Health and Aging Trends Study (NHATS)

People with communication disorders face barriers to accessing safe and respectful healthcare. These barriers result in increased healthcare complications and inefficiencies, both of which contribute to increased healthcare costs. One obstacle to advocating for accommodations that could improve healthcare for this population is the absence of cost effectiveness studies of such accommodations specifically, as well as a paucity of data defining the needs of this population in general. The purpose of this study was to explore how people with communication and swallowing difficulties are characterized in the National Health and Aging Trends Study (NHATS), a nationally representative survey of Medicare beneficiaries aged 65 and older, and how they manage their healthcare. Cross-sectional data from the NHATS rounds 5 to 9 (2015-2019) resulted in 8,038 unique respondents, 3,243 of who reported speech, memory, hearing, and/or swallowing difficulties. More than 90% of respondents with communication difficulties reported having a regular doctor. Less than 60% of respondents with communication difficulties had a family member or caregiver go to medical appointments with them, and around 70% of that subset of participants received help from that caregiver with communication during appointments. Fewer than 15% of respondents with communication difficulties used the internet for healthcare communication or information. Less than 5% of respondents across all communication difficulty categories had received rehabilitation services for communication in the year prior to their survey responses. While the information gleaned from NHATS points to likely gaps between the needs people with communication disorders may have for safe and accessible healthcare, and the support available, future research is needed to improve and clarify how communication disorders are defined and characterized in large-scale surveys to generate more interpretable data. These stronger empirical foundations are needed to support cost-effectiveness analyses to advocate for better communication accessibility of healthcare settings.

Cardiovascular disease and the risk of dementia: a survival analysis using administrative data from Manitoba

OBJECTIVES

Recent research has shown that cardiovascular disease (CVD) raises the risk of dementia and other forms of cognitive decline. Generally, these studies are unable to model the time of diagnosis of CVD in their analyses and treat CVD as a time-fixed variable. Our objective was to assess the risk of being diagnosed with dementia for individuals diagnosed with CVD when CVD is time-dependent.

METHODS

We performed a retrospective cohort study using administrative health datasets from the Manitoba Population Research Data Repository in Canada. We constructed a longitudinal dataset to track individuals enrolled in the Manitoba Health Insurance Registry between April 1, 1997 and March 31, 2015. The study population consisted of 496,192 individuals 30 years of age or older who were not diagnosed with CVD or dementia prior to April 1, 1997. Diagnoses of CVD and dementia were based on diagnosis codes from medical claims and hospitalizations and the use of prescription medications. Hazard ratios were then computed using adjusted Cox-proportional hazards analyses.

RESULTS

Among the CVD subgroups considered, atrial fibrillation, ischemic heart disease, and stroke increased the risk of developing dementia, with stroke doubling one's risk of being diagnosed with the disease (hazard ratio: 1.95; 95% confidence interval: 1.9, 2.01). Age, lower socioeconomic status, and worsening comorbidities also increased the risk of being diagnosed with dementia.

CONCLUSION

A diagnosis of CVD is associated with an increased risk of a future diagnosis of dementia. Promoting good cardiovascular health may serve as an effective measure for preventing dementia.

Individual Heterogeneity in the Probability of Hospitalization, Skilled Nursing Facility Admission, and Mortality

BACKGROUND

Multimorbidity is common in adults aged 65 and older and is associated with health care utilization and mortality, but most methods ignore the interrelationship among concurrent outcome nor provide person-specific probabilities.

METHOD

A longitudinal cohort of 5300 older Americans from the 2011-2015 rounds of the National Health and Aging Study was linked to Center for Medicare and Medicaid Services claims. Odds ratios for 15 chronic conditions adjusted for sociodemographic factors were estimated using a joint model of hospitalization, skilled nursing facility (SNF) admission, and mortality. Additionally, we estimated the person-specific probability of an outcome while currently at risk for other outcomes for different chronic disease combinations demonstrating the heterogeneity across persons with identical chronic conditions.

RESULTS

During the 4-year follow-up period, 2867 (54.1%) individuals were hospitalized, 1029 (19.4%) were admitted to a SNF, and 1237 (23.3%) died. Chronic kidney disease, dementia, heart failure, and chronic obstructive pulmonary disease had significant increased odds for all 3 outcomes. By incorporating a person-specific random intercept, there was considerable range of person-specific probabilities for individuals with hypertension, diabetes, and depression with dementia, (hospitalization: 0.14-0.61; SNF admission: 0.04-0.28) and without dementia (hospitalization: 0.07-0.44; SNF admission: 0.02-0.15). Such heterogeneity was found among individuals with heart failure, ischemic heart disease, chronic kidney disease, hypertension, hyperlipidemia, and osteoarthritis with and without Medicare.

CONCLUSIONS

This approach of joint modeling of interrelated concurrent health care and mortality outcomes not only provides a cohort-level odds and probabilities but addresses the heterogeneity among otherwise similarly characterized persons identifying those with above-average probability of poor outcomes.

Impact of dementia: Health disparities, population trends, care interventions, and economic costs

INTRODUCTION

The dementia experience is not a monolithic phenomenon-and while core elements of dementia are considered universal-people living with dementia experience the disorder differently. Understanding the patterning of Alzheimer's disease and related dementias (ADRD) in the population with regards to incidence, risk factors, impacts on dementia care, and economic costs associated with ADRD can provide clues to target risk and protective factors for all populations as well as addressing health disparities.

METHODS

We discuss information presented at the 2020 National Research Summit on Care, Services, and Supports for Persons with Dementia and Their Caregivers, Theme 1: Impact of Dementia. In this article, we describe select population trends, care interventions, and economic impacts, health disparities and implications for future research from the perspective of our diverse panel comprised of academic stakeholders, and persons living with dementia, and care partners.

RESULTS

Dementia incidence is decreasing yet the advances in population health are uneven. Studies examining the educational, geographic and race/ethnic distribution of ADRD have identified clear disparities. Disparities in health and healthcare may be amplified by significant gaps in the evidence base for pharmacological and non-pharmacological interventions. The economic costs for persons living with dementia and the value of family care partners' time are high, and may persist into future generations.

CONCLUSIONS

Significant research gaps remain. Ensuring that ADRD healthcare services and long-term care services and supports are accessible, affordable, and effective for all segments of our population is essential for health equity. Policy-level interventions are in short supply to redress broad unmet needs and systemic sources of disparities. Whole of society challenges demand research producing whole of society solutions. The urgency, complexity, and scale merit a "whole of government" approach involving collaboration across numerous federal agencies.

Exposure to Anticholinergic and Sedative Drugs and Healthcare Costs in Older Patients with Neurocognitive Disorders

BACKGROUND

Literature supports an increasing number of older patients living with neurocognitive disorders alongside with their annual worldwide costs. Therapeutic management of behavioral and psychological symptoms includes the use of anticholinergic and sedative drugs for which significant exposure is negatively associated with clinical outcomes.

OBJECTIVE

The aim of this study was to assess the healthcare costs differences related to an increase in the exposure to anticholinergic and sedative drugs in older patients with neurocognitive disorder.

METHODS

A longitudinal study was conducted during 3 years on 1,604 participants of the MEMORA cohort linked with both regional public health insurance and hospital discharge databases between 2012 and 2017. Direct medical and non-medical costs were included. Exposure to anticholinergic and sedative drugs was measured by the drug burden index (DBI).

RESULTS

Costs difference associated with a DBI≥0.5 were + 338€ (p < 0.001). After adjustment on comorbidities, NCD stage, cognitive impairment, functional limitation, polypharmacy, and sociodemographic characteristics, a DBI≥0.5 was found to be an independent predictor of an increase of total healthcare costs by 22%(p < 0.001).

CONCLUSION

Anticholinergic and sedative drugs have a substantial economic burden among older patients with neurocognitive disorder. More studies are required to assess the clinical and economic impact of an efficient strategy based on the reduction of the exposure to anticholinergic and sedative drugs and the promotion of non-pharmacological interventions.