Real world outcomes, healthcare utilisation and costs of Alzheimer's disease in England

Abstract

Background

Evidence on health and social care resource utilisation and associated costs, and how this varies across people with Alzheimer's disease (AD) dementia is limited.

Methods

Retrospective cohort, using the Discover dataset, which includes linked health and social care records for approximately 2.5 million people in North-West London. Individuals were followed up from the latter of 2010 or from diagnosis of AD dementia (index) up to 2019. Outcomes were overall survival, care home admission, health and social care utilisation and associated costs, and cardiovascular outcomes. Variation was explored in subpopulations and by stratifying by cost quintile. Generalised linear modelling was used to estimate the association between clinical and demographic characteristics and healthcare costs.

Results

The cohort included 18,116 people diagnosed with AD dementia whose mean age at index was 81 years, 62 % were female and 65 % were of white ethnicity. Median survival from index was 4.9 years (95 %CI: 4.8–5.0). Mean healthcare costs were £4,548(£4,491–£4,604) per person year(ppy). Healthcare costs for the 48 % who used social care were £5,433ppy(£5,353–£5,514) and social care costs were £24,374ppy(£24,372–£24,376). In the overall cohort costs in the highest cost quintile were £13,665ppy(£13,420–£13,911), of which 70 % was from inpatient hospitalisation. Subpopulations admitted to care home (£7,535 £7,362–£7,709), with cardiovascular disease (£6,106;£5,990–£6,222) and with type 2 diabetes (£6,049;£5,901–£6,198) accrued the highest healthcare costs. Factors most strongly associated with cost were dying during follow up (+£2,224;£2,010–£2,493), being frail (+£1,246;£1,051–£1,440) and prior stroke (+£1,207;£908–£1,507).

Conclusion

Characteristics of individuals with high healthcare costs include requirement for social care and cardiometabolic comorbidities. Identifying individuals early in their disease course may improve health outcomes and reduce the cost of AD dementia in later life.