Dementia Carers' Health: Depression in About a Third, and Support Too Thin

About one in three family carers of people living with dementia has symptoms of depression, and about one in three has symptoms of anxiety, according to studies pooled from many countries^[1][2]. The strain is not a fixed cost of caring. It grows with the hours carers give alone, and support that eases it already exists but reaches too few of them.

Caring for someone with dementia can mean broken nights, one’s own appointments put off, friendships that fall away and a constant low hum of worry. Some carers are older people themselves, supporting a husband or wife while managing their own health. This article sets out what the research and official statistics show about carers’ mental and physical health, how that health varies with the hours of care and the support available, and what is known about the breaks, training and psychological support that can protect it. Throughout, the problem the evidence points to is a gap in support, never the person living with dementia.

About one in three carers has symptoms of depression, and as many have anxiety

The clearest global picture comes from systematic reviews that pool many smaller studies. A meta-analysis of 43 studies, covering 16,911 informal carers of people with dementia, put the adjusted pooled prevalence of depression at 31.2% (95% confidence interval 27.7% to 35.0%)^[1]. A separate meta-analysis of 10 studies estimated that 32.1% of informal dementia carers had anxiety, though with a wide confidence interval (20.6% to 46.2%) and large differences between studies that the authors could not explain away^[2].

Isolation is just as common. Pooling 27 studies of 11,134 informal carers from 17 countries, a 2024 review estimated that 50.8% of carers of people with dementia were lonely and 37.1% were socially isolated, with the figures varying by continent^[5]. The US Centers for Disease Control and Prevention states that caregivers of people with Alzheimer’s disease and related dementias are at greater risk of anxiety, depression and poorer quality of life than other caregivers^[6].

Most of this research comes from high-income countries. Where low- and middle-income countries have been studied, strain is clearly present: a population-based survey of 673 people with dementia and their carers at 11 sites in Latin America, India and China found that women carers reported more strain than men^[7]. Who carers are, and how many hours they give, is covered in our study on unpaid carers of people with dementia.

These figures are pooled across studies that used different screening scales, cut-offs and recruitment routes, and many recruited carers through clinics or support services. They show that poor mental health is common among dementia carers; they do not show that any individual carer will be affected, and they cannot be read as a single global rate.

Strain rises with the hours carers give, and with the support they lack

Canada offers one of the clearest national pictures, because home care staff routinely assess the unpaid carers of the older people they visit. The Canadian Institute for Health Information found that unpaid carers of older people with dementia gave an average of 26 hours of care a week, against 17 hours for carers of older people without dementia^[3]. In the same home care data, 45% of carers of people with dementia showed symptoms of caregiver distress, against 26% of other carers; 38% expressed distress, anger or depression, against 19%; and 21% felt unable to continue caring, against 12%^[3].

The link to hours is strong. Among Canadian carers of people with dementia, those giving more than 20 hours of care a week had nearly three times the odds of reporting distress, compared with carers giving 10 hours or less (Home Care Reporting System, 2015–16)^[3]. These are associations in routine data, not proof that hours alone cause distress, but they point to the same lever: care that is shared is care that is easier to sustain.

In the United States, the Alzheimer’s Association reports that 59% of dementia caregivers feel high to very high emotional stress, and that more caregivers of people with dementia than other caregivers describe substantial emotional, financial and physical difficulties^[4]. Its figures draw on surveys, so they describe how carers rate their own stress rather than a clinical diagnosis.

Carers lose sleep, and their physical health can be affected too

Sleep is one of the most consistently measured costs of caring. A meta-analysis of 35 studies with data from 3,268 carers of people with dementia found that carers slept less than non-caregiving adults of a similar age, a gap equivalent to losing 2.42 to 3.50 hours of sleep each week, and that their sleep quality was significantly lower^[8]. Lost sleep matters in its own right, and it is closely bound up with low mood, exhaustion and the ability to keep going.

The evidence on physical health is older and more modest. A 2003 meta-analysis that combined 23 studies comparing caregivers with non-caregivers concluded that caregivers had a slightly greater risk of health problems than non-caregivers^[9]. “Slightly” is the authors’ word and is worth keeping: on average, the physical effects are smaller and less certain than the effects on mental health and sleep, and they vary widely from carer to carer. Studies also differ in how closely carers are matched to the people they are compared with, so it is hard to separate the effect of caring from age, income and existing health.

What the evidence does show is that carers’ own health is part of the care system. When a carer becomes ill, exhausted or unable to continue, the support around the person with dementia changes too, which is one reason services that look after carers are not an optional extra.

Suicide risk is not raised for most carers, but is higher where income is low and at moments of crisis

Suicide among carers is rare, and research on it is limited. The largest population study we found followed 28,696 spouses of people with dementia in Taiwan’s national health insurance data and compared them with spouses of people without dementia. Overall, the risk of suicide was similar in the two groups. It was higher only among spouses in the lowest insurance premium group, a marker of low income, where the risk was 3.2 times that of comparable spouses (95% confidence interval 1.3 to 8.0); a hospital admission of the person with dementia was also associated with a 2.6-fold increase in risk for their spouse^[10].

The finding is from one country, and the confidence intervals are wide. But its message is hopeful as well as sobering: risk was concentrated where financial hardship and moments of crisis meet, which are exactly the points at which services can reach carers. Help is available, and distress in carers is a signal for support, not a predictable outcome of caring.

Support that protects carers’ health exists, but the evidence is uneven and access is thin

Some of the strongest evidence comes from structured psychological and skills programmes. In the START trial in London and Essex, 260 family carers were randomised to a manual-based coping strategy programme or usual care. Carers in the programme had lower anxiety and depression scores (adjusted difference −1.80 points on the Hospital Anxiety and Depression Scale) and lower odds of case-level depression (odds ratio 0.24) in the short term^[11], and the benefit held in longer follow-up (odds ratio 0.14 for case-level depression)^[12]. An economic evaluation found a greater than 99% chance that START was cost-effective^[13].

In the United States, the REACH II trial tested a multicomponent support intervention with 642 Hispanic or Latino, white and Black carers in five cities. Clinical depression was less common in the intervention group than in the control group, which received two brief check-in calls (12.6% against 22.7%)^[14].

Sleep can be helped too: a 2026 review of 30 studies found that non-drug interventions improved carers’ overall sleep quality (standardised mean difference −0.60, 95% confidence interval −1.12 to −0.08, so the size of the effect is uncertain)^[15]. For respite, the research base is weak. The Cochrane review of respite care found only four trials, with 753 participants in total; they showed no significant effect on any carer outcome, and the review rated the quality of the evidence as very low^[16]. That is an absence of good trials, not evidence that breaks do not help; it is a gap research funders could close.

At a global level, the World Health Organization offers iSupport, a self-help skills and training programme for carers of people living with dementia that aims to prevent or reduce the mental and physical health problems associated with caregiving^[17]. Support after diagnosis more widely is covered in our study on post-diagnostic support.

What the evidence asks of us

The research points in one direction. Poor mental health, isolation and lost sleep are common among dementia carers, they are worse where carers give long hours with little help, and structured support can reduce them. That makes carers’ health a question for services and policy, not a private matter for each family. The World Health Organization’s global action plan on dementia, endorsed in 2017 and since extended to 2031, names support for dementia carers as one of its areas for action^[18]. The evidence suggests what that support should look like:

• Count carers’ health. Routine national data on the health of dementia carers are scarce in the sources we reviewed. Canada’s home care assessments show what is possible: a national picture of distress, linked to hours of care^[3]. Health and care systems could record carers’ mental health and sleep as routinely as they record the needs of the person with dementia.
• Fund what works, at scale. Programmes such as START and REACH II reduced depression in trials, and START was very likely cost-effective^[11][13][14]. Low-cost tools such as WHO’s iSupport can extend skills training where specialist services are scarce^[17].
• Share the hours. In Canada, carers giving more than 20 hours of care a week had nearly three times the odds of distress of those giving 10 hours or less^[3]. Home care, day services and breaks that genuinely share the load are part of protecting carers’ health.
• Close the research gap on breaks. Only four respite trials met the Cochrane review’s criteria^[16]. Funders could commission well-designed studies of the breaks carers actually use.
• Reach carers at the hardest moments. Risk concentrates where low income and crises such as a hospital admission meet^[10]. Hospital discharge and financial hardship are natural points for services to check in on carers.
• Look beyond high-income countries. Most of the evidence comes from wealthier countries, while carers in Latin America, India and China report clear strain^[7]. Research and support need to follow carers wherever they are.

Language: this piece uses person-first language ("people living with dementia", "people with dementia"), as most dementia organisations and people with lived experience prefer, and uses clinical terms such as "Alzheimer's disease" or "mild cognitive impairment" only where a study, dataset or diagnosis refers to that specific condition.

Why we're publishing this

Carers of people living with dementia hold up a large share of dementia care, and their own health is too often treated as an afterthought. We gathered this evidence so that carers’ organisations, dementia charities and support groups have it in one place, cleanly sourced and ready to put in front of a commissioner, a funder or a minister. The case is theirs, and that of the people they care for: when carers are supported, people living with dementia are supported too. More of the evidence on dementia across the world is collected in our Dementia & Health research library.

How to read this data

• Pooled prevalence figures (depression, anxiety, loneliness) come from meta-analyses that combine studies using different scales, cut-offs and countries. Their confidence intervals are wide, and many studies recruited carers through clinics or support services, who may differ from carers who never contact services. Most included studies come from high-income countries.
• Canadian figures cover unpaid carers of older people receiving publicly funded home care, assessed by home care staff in 2015–16. They are not a survey of all carers in Canada.
• US figures from the Alzheimer’s Association are self-reported stress from surveys, not clinical diagnoses.
• Odds ratios (for example, “nearly three times the odds” of distress) are not the same as three times the risk, and associations in routine data do not prove cause.
• Trial results (START in England, REACH II in the US) apply to the carers and services in those trials; effects elsewhere may differ.
• Suicide findings come from a single national cohort in Taiwan, with wide confidence intervals.

Use this data

Free to cite with attribution to Understanding Aging. Charities, carers' groups, campaigners and journalists are welcome to reuse these figures and charts. For the underlying figures as a spreadsheet, get in touch.

Important: This article summarises published research and statistics for general information. It is not medical, care or financial advice and cannot be used to diagnose, treat or predict anything about an individual. If you have concerns about your own or someone else's memory or health, please speak to a GP or another qualified health professional.

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