NHATS and NSOC are the two federal surveys behind most current U.S. dementia caregiving research, and in 2026 their priorities center on data infrastructure, caregiver burden, and sleep health.
NHATS (National Health and Aging Trends Study) tracks a national panel of Medicare beneficiaries 65 and older, while NSOC (National Study of Caregivers) interviews the family members who care for them, together forming the main dataset researchers use to understand dementia care in the United States. For readers managing their own memory concerns or a family member's, these two surveys don't diagnose or treat anything. They shape the research and funding decisions that eventually reach clinics, caregiver programs, and public policy, and the sections below explain what that means in practice.
Medical information disclaimer: This article is for general educational purposes only and does not provide medical advice, diagnosis, or treatment. Always consult a physician or other qualified health professional about symptoms, medications, tests, or treatment decisions.
Table of Contents
- What are NHATS and NSOC, and why do they matter for dementia care?
- What is NIA prioritizing in 2026?
- What has this data already shown about caregiver burden?
- How reliable is dementia identification in this data?
- How can researchers or clinicians access this data, and what should families take from it?
- Frequently Asked Questions
What are NHATS and NSOC, and why do they matter for dementia care?
NHATS launched in 2011 with 8,245 participants age 65 and older, over 40% of them 80 or older and about 20% identifying as Black or African American. Participants are interviewed every year, and when a participant dies, researchers complete a proxy interview with someone who knew them, according to the SGIM resource page on NHATS/NSOC. That design lets researchers follow the same people over time as cognitive and physical health change.
NSOC interviews the unpaid family caregivers of NHATS participants. Because the two surveys are linked, they're the only national data source that captures both sides of a caregiving relationship at once: the older adult's own health trajectory and the caregiver's experience, according to Johns Hopkins Bloomberg School of Public Health. For a reader trying to understand where dementia caregiving statistics come from, this pairing is usually the source.
What is NIA prioritizing in 2026?
The National Institute on Aging held its "2026 Dementia Care and Caregiving Research Summit" virtually March 17–19, 2026. One of five priority sessions was devoted specifically to Alzheimer's disease and related dementias (AD/ADRD) data infrastructure, alongside sessions on economic impact, community-based care, intervention rigor, and cross-system care coordination, according to the University of Michigan CAPRA event listing. Placing data infrastructure on equal footing with care delivery and economic impact signals that NIA treats the quality of underlying datasets like NHATS and NSOC as a direct lever on care outcomes, not just a technical backend issue.
A related NIA-funded project led by Judith Kasper at Johns Hopkins and Vicki Freedman at the University of Michigan is extending NSOC specifically for dementia research. The project re-interviews 2015 NSOC caregivers and adds new caregivers identified in the 2017 NHATS round, along with a new module on caregiver interactions with health systems and two time-diary interviews, according to the Johns Hopkins/ISR project page. The time-diary component is notable because it captures how caregivers actually spend their day, rather than relying only on their own estimates of hours spent caregiving.
What has this data already shown about caregiver burden?
A Johns Hopkins analysis comparing NSOC data from 2011 and 2022 found that the number of family caregivers supporting older adults rose by nearly one-third over that eleven-year span. The 2022 sample included 2,122 family caregivers, and the analysis found that burden continues to concentrate among women and among people caring for someone with dementia, according to Johns Hopkins Bloomberg School of Public Health.
That growth matters for readers weighing whether to take on a caregiving role themselves, since it reflects a trend that predates and likely outlasts any single family's situation. A more specific finding came from a January 2026 study in the Journal of Applied Gerontology, which used 2017 NSOC data to identify factors behind poor sleep quality among people caring for someone with dementia, according to a Journal of Applied Gerontology listing on Metatoc. Sleep disruption is now treated as a measurable, trackable caregiver-health outcome within the dataset, not just an anecdotal complaint, which matters for caregivers who may not realize their own sleep loss is a documented and studied part of the caregiving role.
How reliable is dementia identification in this data?
Researchers don't rely on a single method to flag dementia in NHATS. Teams have been validating two claims-based algorithms, the Bynum Standard and the CMS Chronic Condition Warehouse definition, against NHATS's own probable-dementia classification, using data from Round 7 (2017, n=5,058), Round 9 (2019, n=4,048), and Round 11 (2021–22, n=3,109), according to a PMC study comparing claims-based dementia algorithms.
This cross-checking work feeds directly into 2026 decisions about which dementia identification method researchers trust for a given analysis. For readers, the practical takeaway is that "how many people have dementia" in any given study depends partly on which identification method the researchers chose, and that choice is still being actively refined rather than settled.
How can researchers or clinicians access this data, and what should families take from it?
Getting the most detailed version of this data isn't quick. Researchers who want the restricted NHATS-NSOC linked files, including Medicare claims linkages, must obtain a Data Use Agreement through NIA, an approval process that commonly takes roughly a year, according to the ICPSR NHATS study page. That lag means findings based on the newest, most detailed linkages often reach publication well after the data itself was collected.
For adults with memory concerns and their families, the right way to use any of this is as context, not instruction. NHATS and NSOC findings describe population-level patterns that shape federal research funding and caregiving policy; they don't substitute for a clinician's direct evaluation of an individual's memory or cognitive symptoms, according to the Johns Hopkins project overview. A rising national caregiver count or a documented sleep-quality risk is useful for understanding what's common and what support systems exist, but a specific diagnosis or care plan still depends on an individual clinical evaluation.
Frequently Asked Questions
Can I access NHATS or NSOC data myself?
Public-use files are available through standard research data channels, but the detailed linked files require a Data Use Agreement through NIA, a process the ICPSR NHATS study page says commonly takes about a year.
Does NHATS diagnose dementia in its participants?
NHATS applies its own probable-dementia classification, which researchers have been validating against claims-based algorithms using Rounds 7, 9, and 11 data, according to a PMC comparison study; it is a research classification, not a clinical diagnosis.
Is caregiver burden getting worse over time?
The number of family caregivers for older adults grew nearly one-third between 2011 and 2022, with burden concentrated among women and dementia caregivers, per Johns Hopkins Bloomberg School of Public Health.
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