Public Release: 

Dementia increases the risk of 30-day readmission to the hospital after discharge

American Geriatrics Society

About 25 percent of older adults admitted to hospitals have dementia and are at increased risk for serious problems like in-hospital falls and delirium (the medical term for an abrupt, rapid change in mental function). As a result, older adults with dementia are more likely to do poorly during hospital stays compared to older adults without dementia.

Until now, little was known about the effects of dementia on early hospital readmission. Researchers in Japan recently published the results of a study to learn more about the effects of dementia and being admitted to the hospital within 30 days of a previous hospital discharge (the medical term for leaving the hospital once your care is considered complete). Their study was published in the Journal of the American Geriatrics Society.

The researchers studied information from people 65-years-old and older who had been discharged from hospitals between 2014 and 2015, and then followed them for six months. The researchers were looking for unplanned readmissions to the hospital within 30 days of the patient's discharge.

Older adults with dementia had about twice the risk for hospital readmissions compared to the risk for those without dementia. However, the rate of risk depended on the older adult's diagnosis. For example, people with dementia who were hospitalized for hip fractures were at higher risk for hospital readmission than people with dementia who were diagnosed with gallbladder inflammation.

In 17 of the top 30 most common health conditions, older adults with dementia were more likely to be readmitted to the hospital than people without dementia.

The researchers noted that three issues may raise the risk of being readmitted to the hospital if you have dementia:

  • Older adults with dementia may have difficulty following directions about taking medication and attending follow-up visits. This may lead to poor health and readmissions.

  • People with dementia may be less able to express their symptoms, which can delay decisions to seek treatment.

  • Special discharge planning for people with dementia may not be available in all hospitals.

The researchers concluded that the risk of readmission for older adults with dementia varies according to diagnosis, and that special discharge planning for people with dementia is important.


This summary is from "Dementia and risk of 30-day readmission in older adults after discharge from acute care hospitals." It appears online ahead of print in the Journal of the American Geriatrics Society. The study authors are Nobuo Sakata, MD, MPH; Yasuyuki Okumura, PhD; Kiyohide Fushimi, MD, PhD; Miharu Nakanishi, RN, PSW, PhD; and Asao Ogawa, MD, PhD.

About the Health in Aging Foundation

This research summary was developed as a public education tool by the Health in Aging Foundation. The Foundation is a national non-profit established in 1999 by the American Geriatrics Society to bring the knowledge and expertise of geriatrics healthcare professionals to the public. We are committed to ensuring that people are empowered to advocate for high-quality care by providing them with trustworthy information and reliable resources. Last year, we reached nearly 1 million people with our resources through We also help nurture current and future geriatrics leaders by supporting opportunities to attend educational events and increase exposure to principles of excellence on caring for older adults. For more information or to support the Foundation's work, visit

About the Journal of the American Geriatrics Society

Included in more than 9,000 library collections around the world, the Journal of the American Geriatrics Society (JAGS) highlights emerging insights on principles of aging, approaches to older patients, geriatric syndromes, geriatric psychiatry, and geriatric diseases and disorders. First published in 1953, JAGS is now one of the oldest and most impactful publications on gerontology and geriatrics, according to ISI Journal Citation Reports®. Visit for more details.

About the American Geriatrics Society

Founded in 1942, the American Geriatrics Society (AGS) is a nationwide, not-for-profit society of geriatrics healthcare professionals that has--for 75 years--worked to improve the health, independence, and quality of life of older people. Its nearly 6,000 members include geriatricians, geriatric nurses, social workers, family practitioners, physician assistants, pharmacists, and internists. The Society provides leadership to healthcare professionals, policymakers, and the public by implementing and advocating for programs in patient care, research, professional and public education, and public policy. For more information, visit

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