If Caregiving Were a Diagnosis

Someone in the room put it this way: in a way, caregiving is an unseen disease.

It landed, because everyone there knew what was meant. We wanted to know whether it holds up as more than a figure of speech. So we did what you would do with any illness. We looked at the symptoms, how common they are, and how they compare with conditions that do get a name, a chart note, and a follow-up appointment.

The Symptom Picture

The largest national survey of family caregivers is Caregiving in the US 2025, from AARP and the National Alliance for Caregiving. It counts 63 million caregivers, about one in four American adults. Among them (Caregiver Health findings):

• Nearly two thirds report moderate or high emotional stress.
• 45% report moderate or high physical strain.
• One in five rates their own health as fair or poor. That rises to 26% among caregivers who live with the person they care for, and 32% among lower-income caregivers.
• On average, caregivers lose about four days a month to poor physical or mental health that keeps them from their usual activities.
• 23% say caregiving has made it hard to take care of their own health.
• 24% say they feel alone.

Read that as a clinician would, as a cluster: stress, physical wear, declining health, lost days, neglected self-care, isolation. If those turned up together in one patient, nobody would call it a mood. It would get written down.

Side by Side With Conditions That Get a Diagnosis

A caution before the comparisons. These come from different studies, using different measures, in different populations. They are illustrations, not exact equivalences. But they are hard to ignore.

Depression, at the same rate as after a stroke. A 2020 review pooling 43 studies and more than 16,000 people caring for someone with dementia found that 31% had depression (Collins and Kishita, Ageing & Society). A 2014 review pooling 61 studies and 25,488 stroke survivors found that 31% had depression after their stroke (Hackett and Pickles, International Journal of Stroke).

The same rate. Post-stroke depression is something stroke care teams are trained to look for. Nobody is routinely looking for it in the person who drove the stroke survivor home.

Fatigue, at the level of cancer treatment. A Swedish study measured fatigue in relatives of people receiving palliative care, using a standard five-part fatigue scale. The relatives scored above population norms on every dimension, higher than relatives of people with end-stage kidney disease, and comparable to people with cancer who were undergoing radiation therapy (Carlsson, Palliative & Supportive Care, 2009). It was a small study, 56 people, so it is a signal rather than a settled number. It is also exactly what people in this group describe.

The heart. The Nurses’ Health Study followed 54,412 women with no heart disease. Those caring for an ill or disabled spouse nine or more hours a week had twice the risk of developing coronary heart disease (Lee et al., American Journal of Preventive Medicine, 2003). Nine hours a week is not much. Most people in this room passed it a long time ago.

Sleep. A review of 35 studies covering 3,268 dementia caregivers found they sleep about two and a half to three and a half hours less per week than people of similar age who are not caregiving, and that the sleep they do get is worse (Gao, Chapagain and Scullin, JAMA Network Open, 2019). That is close to losing a full night every two weeks, indefinitely.

Healing and aging. In a well-known experiment, researchers made a small, identical wound on the arm of Alzheimer’s caregivers and of matched people who were not caregiving. The caregivers’ wounds took about nine days longer to heal (Kiecolt-Glaser et al., The Lancet, 1995). A later study of mothers caring for a chronically ill child found that the women under the highest perceived stress had cells that looked, by one measure of cellular aging, about ten years older than their actual age (Epel et al., PNAS, 2004). The detail worth noticing in that second study is that how stressed the women felt mattered more than how objectively hard their situation looked from outside.

An Honest Complication

For years a single number got quoted everywhere: caregivers have a 63% higher risk of dying. It came from a 1999 study of older spouses who were caregiving and reported feeling strained by it. It was never about caregivers as a whole.

Larger population studies since then have found something different. At least eight of them, on several continents, found that caregivers as a group live as long as or longer than comparable people who are not caregiving, with mortality 16 to 26% lower. The likely reasons are that healthier people are more likely to take on caregiving in the first place, and that caregiving can bring purpose, activity, and connection (David Roth, Johns Hopkins Center on Aging and Health).

We include that because it is true, and because it makes the disease comparison more useful rather than less. Caregiving does not make everyone sick. It behaves like an illness with risk factors, and the harm gathers where the risk factors gather. The same AARP survey shows where they are:

• Hours. Nearly a quarter of caregivers provide 40 or more hours of care a week. The heart study’s threshold was nine.
• Living together. Fair or poor health rises from 20% overall to 26% among caregivers who share a home with the person they care for.
• No choice. Caregivers who did not feel they had a choice report about 8 poor mental health days a month, against 4.5 for those who did. 34% of them report feeling isolated, against 12%.
• Money. Fair or poor health reaches 32% among lower-income caregivers.
• Going it alone. About three in ten caregivers have no other help at all, paid or unpaid.

Isolation and going it alone are the two risk factors this meeting spent the most time on, without calling them that. They are covered further down, in The Symptoms No One Sees and The Hardest Ask.

Where We Have Been Before

The group has circled the caregiver’s own health many times, and those conversations hold up well next to the research:

• The Appointments We Postpone, on staying meticulous about everyone’s health but our own, with an annual checklist.
• You Can’t Get Sick and When the Caregiver Gets Sick, on what happens when the person holding everything up cannot.
• The Unrelenting Alertness, which is the sleep data above, described from the inside.
• When You’re Too Full to Take On Anything More, on what happens when the body decides to stop for you.

Resources

Caregiving in the US 2025: AARP and the National Alliance for Caregiving. The full national survey, with breakdowns by relationship, hours, income, and more.