Seniors in these California counties have the highest Alzheimer's rates
Seniors in these California counties have the highest Alzheimer's rates
An estimated 719,700 people in California over age 65 have Alzheimer's, according to estimates released by the Alzheimer's Association in 2023.
, and that number is only growing. Medical professionals believe the volume of diagnoses could double by 2060 if there isn't a breakthrough in prevention鈥攐r a cure.
For the first time, the Alzheimer's Association released estimates on Alzheimer's prevalence in each state and county. Researchers hope these figures will help regional public health officials better treat Alzheimer's patients, develop localized care plans, and budget for care鈥攑articularly as new treatments come at a cost.
Alzheimer's is the most common form of dementia and is among the top 10 causes of death in the U.S. These as fatality rates from other health-related causes, including heart disease and stroke, are on the decline. With Alzheimer's, the brain shrinks, brain cells die, and peoples' memory and language centers fail. As the disease advances, the loss of brain function leads to dehydration, malnutrition, infection, and ultimately death.
Developing a cure or effective treatment has been slow, as medical professionals still don't know what causes Alzheimer's. But earlier this year, the Food and Drug Administration fully greenlit the first drug proven to effectively treat the disease: lecanemab (sold under the brand name Leqembi), created by Eisai Inc. and Biogen. Earlier treatments only addressed symptoms of Alzheimer's, while lecanemab treats the early stages of the disease itself and slows its progression.
The drug costs $26,500 annually and is partially covered by Medicare if a patient's medical team participates in a registry to track the drug's outcomes. Those high costs could keep the treatment out of reach for low-income Americans, who already have , studies have shown.
Nearly all Alzheimer's patients are on government insurance, and estimates show that Medicare could on lecanemab and related care. That pales in comparison to the cost in 2023, including nursing home stays, symptom management medications, and other care for those with the disease. Without medical advancements, the Alzheimer's Association expects those costs could rise to nearly $1 trillion by 2050.
If lecanemab and similar drugs can slow progression in even half of mild Alzheimer's patients, one study from the University of Chicago estimates Americans would in care-related costs over the next decade.
Having a treatment to slow the progression of Alzheimer's also creates more urgency to diagnose the disease sooner to retain more brain function. Warning signs for the disease include disruptive memory loss, difficulty with familiar tasks, worsening judgment, and changes in mood and personality.
The U.S. has a shortage of specialists in elder and memory-related medicine and nurses providing care at nursing homes and assisted-living facilities. In regions with high rates of Alzheimer's, these shortages could be catastrophic within the current models of care.
mapped states by the share of the population over age 65 that is estimated to have Alzheimer's disease, using data released by the in July 2023. As a part of the , 麻豆原创 also took a closer look at California and ranked the counties within it by their estimated Alzheimer's prevalence.
Alzheimer's rates by state
State and detailed county-level estimates show vast disparities in the prevalence of Alzheimer's disease based on racial and socioeconomic factors. Older Americans, women, Black and Hispanic Americans, and those with lower education levels are at higher risk for developing Alzheimer's dementia, according to data from the , on which these estimates were based.
The East and Southeast regions of the U.S. were estimated to have the highest prevalence of Alzheimer's, particularly Maryland, New York, Florida, Mississippi, and Louisiana. In Maryland, , and a compared to national numbers鈥攕ubstantial risk factors that earn it the #1 spot.
In addition to a high prevalence of the disease, Mississippi has the highest Alzheimer's mortality rate, largely due to having the worst-quality health care system in the country, Time reported.
Some of the most afflicted counties are home to Black and Hispanic populations in the South, low-income populations in Appalachia, and older adults in Florida, according to Time. Other studies have found that people in rural areas tend to be of dementia, delaying or preventing potential treatments.
Read on to see where in California has the highest prevalence of Alzheimer's, ranked by the share of the 65 and over population estimated to have the disease. Initial ties were broken by the number of people estimated to have Alzheimer's, but some ties may remain.
#58. Alpine County
- Share of 65+ population with Alzheimer's: 8.1%
- Number of 65+ population with Alzheimer's: Not available
*These are estimates; actual values have a 95% likelihood of being within 0.6 percentage points of the estimate.
#57. Mono County
- Share of 65+ population with Alzheimer's: 9.3%
- Number of 65+ population with Alzheimer's: 200 people
*These are estimates; actual values have a 95% likelihood of being within 0.6 percentage points of the estimate.
#56. Trinity County
- Share of 65+ population with Alzheimer's: 9.3%
- Number of 65+ population with Alzheimer's: 300 people
*These are estimates; actual values have a 95% likelihood of being within 0.6 percentage points鈥攐r 50 people鈥攐f the estimate.
#55. Plumas County
- Share of 65+ population with Alzheimer's: 9.4%
- Number of 65+ population with Alzheimer's: 500 people
*These are estimates; actual values have a 95% likelihood of being within 0.6 percentage points鈥攐r 50 people鈥攐f the estimate.
#54. Humboldt County
- Share of 65+ population with Alzheimer's: 9.7%
- Number of 65+ population with Alzheimer's: 2,500 people
*These are estimates; actual values have a 95% likelihood of being within 0.6 percentage points鈥攐r 150 people鈥攐f the estimate.
#53. Sierra County
- Share of 65+ population with Alzheimer's: 9.8%
- Number of 65+ population with Alzheimer's: 100 people
*These are estimates; actual values have a 95% likelihood of being within 0.6 percentage points of the estimate.
#52. Siskiyou County
- Share of 65+ population with Alzheimer's: 9.8%
- Number of 65+ population with Alzheimer's: 1,100 people
*These are estimates; actual values have a 95% likelihood of being within 0.6 percentage points鈥攐r 50 people鈥攐f the estimate.
#51. Del Norte County
- Share of 65+ population with Alzheimer's: 9.9%
- Number of 65+ population with Alzheimer's: 500 people
*These are estimates; actual values have a 95% likelihood of being within 0.6 percentage points鈥攐r 50 people鈥攐f the estimate.
#50. Mendocino County
- Share of 65+ population with Alzheimer's: 9.9%
- Number of 65+ population with Alzheimer's: 2,000 people
*These are estimates; actual values have a 95% likelihood of being within 0.6 percentage points鈥攐r 150 people鈥攐f the estimate.
#49. Nevada County
- Share of 65+ population with Alzheimer's: 9.9%
- Number of 65+ population with Alzheimer's: 2,800 people
*These are estimates; actual values have a 95% likelihood of being within 0.6 percentage points鈥攐r 150 people鈥攐f the estimate.
#48. Amador County
- Share of 65+ population with Alzheimer's: 10.0%
- Number of 65+ population with Alzheimer's: 1,100 people
*These are estimates; actual values have a 95% likelihood of being within 0.6 percentage points鈥攐r 50 people鈥攐f the estimate.
#47. Calaveras County
- Share of 65+ population with Alzheimer's: 10.0%
- Number of 65+ population with Alzheimer's: 1,300 people
*These are estimates; actual values have a 95% likelihood of being within 0.7 percentage points鈥攐r 50 people鈥攐f the estimate.
#46. El Dorado County
- Share of 65+ population with Alzheimer's: 10.0%
- Number of 65+ population with Alzheimer's: 4,400 people
*These are estimates; actual values have a 95% likelihood of being within 0.6 percentage points鈥攐r 300 people鈥攐f the estimate.
#45. Lassen County
- Share of 65+ population with Alzheimer's: 10.1%
- Number of 65+ population with Alzheimer's: 500 people
*These are estimates; actual values have a 95% likelihood of being within 0.6 percentage points of the estimate.
#44. Yuba County
- Share of 65+ population with Alzheimer's: 10.2%
- Number of 65+ population with Alzheimer's: 1,100 people
*These are estimates; actual values have a 95% likelihood of being within 0.8 percentage points鈥攐r 100 people鈥攐f the estimate.
#42. Lake County (tie)
- Share of 65+ population with Alzheimer's: 10.2%
- Number of 65+ population with Alzheimer's: 1,500 people
*These are estimates; actual values have a 95% likelihood of being within 0.7 percentage points鈥攐r 100 people鈥攐f the estimate.
#42. Tuolumne County (tie)
- Share of 65+ population with Alzheimer's: 10.2%
- Number of 65+ population with Alzheimer's: 1,500 people
*These are estimates; actual values have a 95% likelihood of being within 0.6 percentage points鈥攐r 100 people鈥攐f the estimate.
#41. Shasta County
- Share of 65+ population with Alzheimer's: 10.2%
- Number of 65+ population with Alzheimer's: 3,900 people
*These are estimates; actual values have a 95% likelihood of being within 0.6 percentage points鈥攐r 200 people鈥攐f the estimate.
#40. Santa Cruz County
- Share of 65+ population with Alzheimer's: 10.3%
- Number of 65+ population with Alzheimer's: 5,000 people
*These are estimates; actual values have a 95% likelihood of being within 0.8 percentage points鈥攐r 400 people鈥攐f the estimate.
#39. Modoc County
- Share of 65+ population with Alzheimer's: 10.4%
- Number of 65+ population with Alzheimer's: 300 people
*These are estimates; actual values have a 95% likelihood of being within 0.6 percentage points鈥攐r 50 people鈥攐f the estimate.
#38. Mariposa County
- Share of 65+ population with Alzheimer's: 10.4%
- Number of 65+ population with Alzheimer's: 500 people
*These are estimates; actual values have a 95% likelihood of being within 0.6 percentage points of the estimate.
#37. Sonoma County
- Share of 65+ population with Alzheimer's: 10.5%
- Number of 65+ population with Alzheimer's: 10,900 people
*These are estimates; actual values have a 95% likelihood of being within 0.7 percentage points鈥攐r 650 people鈥攐f the estimate.
#36. San Luis Obispo County
- Share of 65+ population with Alzheimer's: 10.6%
- Number of 65+ population with Alzheimer's: 6,400 people
*These are estimates; actual values have a 95% likelihood of being within 0.7 percentage points鈥攐r 400 people鈥攐f the estimate.
#35. Butte County
- Share of 65+ population with Alzheimer's: 10.7%
- Number of 65+ population with Alzheimer's: 4,200 people
*These are estimates; actual values have a 95% likelihood of being within 0.7 percentage points鈥攐r 250 people鈥攐f the estimate.
#34. Tehama County
- Share of 65+ population with Alzheimer's: 10.8%
- Number of 65+ population with Alzheimer's: 1,400 people
*These are estimates; actual values have a 95% likelihood of being within 0.7 percentage points鈥攐r 100 people鈥攐f the estimate.
#33. Glenn County
- Share of 65+ population with Alzheimer's: 11.0%
- Number of 65+ population with Alzheimer's: 500 people
*These are estimates; actual values have a 95% likelihood of being within 0.9 percentage points鈥攐r 50 people鈥攐f the estimate.
#32. Marin County
- Share of 65+ population with Alzheimer's: 11.1%
- Number of 65+ population with Alzheimer's: 6,700 people
*These are estimates; actual values have a 95% likelihood of being within 0.7 percentage points鈥攐r 400 people鈥攐f the estimate.
#31. Placer County
- Share of 65+ population with Alzheimer's: 11.1%
- Number of 65+ population with Alzheimer's: 9,100 people
*These are estimates; actual values have a 95% likelihood of being within 0.7 percentage points鈥攐r 550 people鈥攐f the estimate.
#30. Inyo County
- Share of 65+ population with Alzheimer's: 11.2%
- Number of 65+ population with Alzheimer's: 500 people
*These are estimates; actual values have a 95% likelihood of being within 0.7 percentage points of the estimate.
#29. Madera County
- Share of 65+ population with Alzheimer's: 11.4%
- Number of 65+ population with Alzheimer's: 2,600 people
*These are estimates; actual values have a 95% likelihood of being within 1.1 percentage points鈥攐r 250 people鈥攐f the estimate.
#28. Kern County
- Share of 65+ population with Alzheimer's: 11.4%
- Number of 65+ population with Alzheimer's: 11,900 people
*These are estimates; actual values have a 95% likelihood of being within 1.0 percentage points鈥攐r 1,100 people鈥攐f the estimate.
#27. Napa County
- Share of 65+ population with Alzheimer's: 11.5%
- Number of 65+ population with Alzheimer's: 3,200 people
*These are estimates; actual values have a 95% likelihood of being within 0.8 percentage points鈥攐r 200 people鈥攐f the estimate.
#26. Yolo County
- Share of 65+ population with Alzheimer's: 11.5%
- Number of 65+ population with Alzheimer's: 3,400 people
*These are estimates; actual values have a 95% likelihood of being within 0.9 percentage points鈥攐r 250 people鈥攐f the estimate.
#25. Sacramento County
- Share of 65+ population with Alzheimer's: 11.5%
- Number of 65+ population with Alzheimer's: 26,600 people
*These are estimates; actual values have a 95% likelihood of being within 0.8 percentage points鈥攐r 1,700 people鈥攐f the estimate.
#24. Stanislaus County
- Share of 65+ population with Alzheimer's: 11.6%
- Number of 65+ population with Alzheimer's: 8,700 people
*These are estimates; actual values have a 95% likelihood of being within 1.0 percentage points鈥攐r 700 people鈥攐f the estimate.
#23. Orange County
- Share of 65+ population with Alzheimer's: 11.6%
- Number of 65+ population with Alzheimer's: 57,800 people
*These are estimates; actual values have a 95% likelihood of being within 0.8 percentage points鈥攐r 4,100 people鈥攐f the estimate.
#22. Sutter County
- Share of 65+ population with Alzheimer's: 11.7%
- Number of 65+ population with Alzheimer's: 1,800 people
*These are estimates; actual values have a 95% likelihood of being within 0.8 percentage points鈥攐r 100 people鈥攐f the estimate.
#21. Solano County
- Share of 65+ population with Alzheimer's: 11.7%
- Number of 65+ population with Alzheimer's: 8,800 people
*These are estimates; actual values have a 95% likelihood of being within 0.8 percentage points鈥攐r 600 people鈥攐f the estimate.
#20. Contra Costa County
- Share of 65+ population with Alzheimer's: 11.7%
- Number of 65+ population with Alzheimer's: 22,600 people
*These are estimates; actual values have a 95% likelihood of being within 0.8 percentage points鈥攐r 1,450 people鈥攐f the estimate.
#19. Colusa County
- Share of 65+ population with Alzheimer's: 11.8%
- Number of 65+ population with Alzheimer's: 400 people
*These are estimates; actual values have a 95% likelihood of being within 1.1 percentage points of the estimate.
#18. Ventura County
- Share of 65+ population with Alzheimer's: 11.8%
- Number of 65+ population with Alzheimer's: 16,500 people
*These are estimates; actual values have a 95% likelihood of being within 0.9 percentage points鈥攐r 1,300 people鈥攐f the estimate.
#17. San Diego County
- Share of 65+ population with Alzheimer's: 11.8%
- Number of 65+ population with Alzheimer's: 58,400 people
*These are estimates; actual values have a 95% likelihood of being within 0.9 percentage points鈥攐r 4,300 people鈥攐f the estimate.
#16. San Joaquin County
- Share of 65+ population with Alzheimer's: 11.9%
- Number of 65+ population with Alzheimer's: 12,200 people
*These are estimates; actual values have a 95% likelihood of being within 1.0 percentage points鈥攐r 950 people鈥攐f the estimate.
#15. Santa Clara County
- Share of 65+ population with Alzheimer's: 11.9%
- Number of 65+ population with Alzheimer's: 32,300 people
*These are estimates; actual values have a 95% likelihood of being within 0.8 percentage points鈥攐r 2,150 people鈥攐f the estimate.
#14. San Benito County
- Share of 65+ population with Alzheimer's: 12.0%
- Number of 65+ population with Alzheimer's: 1,000 people
*These are estimates; actual values have a 95% likelihood of being within 1.2 percentage points鈥攐r 100 people鈥攐f the estimate.
#13. San Mateo County
- Share of 65+ population with Alzheimer's: 12.0%
- Number of 65+ population with Alzheimer's: 15,500 people
*These are estimates; actual values have a 95% likelihood of being within 0.8 percentage points鈥攐r 1,050 people鈥攐f the estimate.
#12. San Bernardino County
- Share of 65+ population with Alzheimer's: 12.0%
- Number of 65+ population with Alzheimer's: 32,200 people
*These are estimates; actual values have a 95% likelihood of being within 1.1 percentage points鈥攐r 2,950 people鈥攐f the estimate.
#11. Tulare County
- Share of 65+ population with Alzheimer's: 12.1%
- Number of 65+ population with Alzheimer's: 6,700 people
*These are estimates; actual values have a 95% likelihood of being within 1.2 percentage points鈥攐r 650 people鈥攐f the estimate.
#10. Monterey County
- Share of 65+ population with Alzheimer's: 12.1%
- Number of 65+ population with Alzheimer's: 7,600 people
*These are estimates; actual values have a 95% likelihood of being within 1.0 percentage points鈥攐r 600 people鈥攐f the estimate.
#9. Alameda County
- Share of 65+ population with Alzheimer's: 12.1%
- Number of 65+ population with Alzheimer's: 29,700 people
*These are estimates; actual values have a 95% likelihood of being within 0.8 percentage points鈥攐r 1,850 people鈥攐f the estimate.
#8. Fresno County
- Share of 65+ population with Alzheimer's: 12.2%
- Number of 65+ population with Alzheimer's: 15,700 people
*These are estimates; actual values have a 95% likelihood of being within 1.1 percentage points鈥攐r 1,400 people鈥攐f the estimate.
#7. Riverside County
- Share of 65+ population with Alzheimer's: 12.2%
- Number of 65+ population with Alzheimer's: 46,000 people
*These are estimates; actual values have a 95% likelihood of being within 1.0 percentage points鈥攐r 3,650 people鈥攐f the estimate.
#6. Merced County
- Share of 65+ population with Alzheimer's: 12.3%
- Number of 65+ population with Alzheimer's: 4,000 people
*These are estimates; actual values have a 95% likelihood of being within 1.2 percentage points鈥攐r 350 people鈥攐f the estimate.
#5. Santa Barbara County
- Share of 65+ population with Alzheimer's: 12.3%
- Number of 65+ population with Alzheimer's: 8,800 people
*These are estimates; actual values have a 95% likelihood of being within 1.0 percentage points鈥攐r 700 people鈥攐f the estimate.
#4. San Francisco County
- Share of 65+ population with Alzheimer's: 12.4%
- Number of 65+ population with Alzheimer's: 17,900 people
*These are estimates; actual values have a 95% likelihood of being within 0.8 percentage points鈥攐r 1,100 people鈥攐f the estimate.
#3. Kings County
- Share of 65+ population with Alzheimer's: 12.5%
- Number of 65+ population with Alzheimer's: 2,100 people
*These are estimates; actual values have a 95% likelihood of being within 1.2 percentage points鈥攐r 200 people鈥攐f the estimate.
#2. Los Angeles County
- Share of 65+ population with Alzheimer's: 13.2%
- Number of 65+ population with Alzheimer's: 190,300 people
*These are estimates; actual values have a 95% likelihood of being within 1.1 percentage points鈥攐r 16,050 people鈥攐f the estimate.
#1. Imperial County
- Share of 65+ population with Alzheimer's: 15.0%
- Number of 65+ population with Alzheimer's: 3,700 people
*These are estimates; actual values have a 95% likelihood of being within 2.0 percentage points鈥攐r 500 people鈥攐f the estimate.
This story features data reporting by and writing by Paxtyn Merten and is part of a series utilizing data automation across 50 states.