Includes a Special Report on the Financial and Personal Benefits of Early Diagnosis 2018 Alzheimer’s Disease Facts and Figures is a statistical resource for U.S. data related to Alzheimer’s disease, the most common cause of dementia. Background and context for interpretating the data are contained in the Overview. Additional sections address prevalence, mortality and morbidity, caregiving and use and costs of health care and services. A Special Report discusses the financial and personal benefits of diagnosing earlier in the disease process, in the stage of mild cognitive impairment.