Study on the Health Economic Burden of Alzheimer's Disease in China

Methods: Employing a nationwide multistage clustered sampling design. The clusters were hospitals (from 31 provinces across China), which were stratified by provincial the Alzheimer's Disease population size (based on the China Alzheimer's Disease Report 2024 and the China Statistical Yearbook 2025). Within selected hospitals, sequential samples of patients dignosed with AD and aMCI were drawn The survey, incorporating validated scales and structured interviews, will assess economic burdens, QoL, and caregiver burdens. Statistical analyses, including multiple linear regression models and random forest techniques, will examine factors associated with economic burdens and QoL.

Discussion: This research, spanning all provinces of mainland China, promises to be a timely analysis of AD's economic burden. Beyond quantifying direct and indirect costs, it integrates validated scales to understand patients' and caregivers' emotional and social dimensions. Insights gleaned will inform targeted interventions, caregiver support strategies, and evidence-based policy reforms, thereby enhancing AD care quality and resource allocation efficiency in Chinese healthcare settings. Ethical considerations and future research avenues are also outlined, emphasizing a comprehensive and forward-looking approach.

Diagnosed according to the National Institute on Aging-Alzheimer's 1.Association (NIA-AA) criteria for aMCI and AD.

2.Clinical Dementia Rating (CDR) score greater than or equal to 0.5 3.Have good visual, auditory, and language functions, or can complete neuropsychological assessments after correction.

4.Participants or their legal representatives sign informed consent. Exclusion criteria

• History of stroke with neurological focal signs and imaging findings consistent with cerebral small vessel disease (Modified Fazekas score ≥2).
• Presence of mental or neurological developmental delay.
• Presence of other known conditions that may cause cognitive impairment.
• Diagnosis of a disease that prevents completion of cognitive assessments.
• Refusal to sign informed consent at baseline.