Caregiving does not inherently kill those who provide it, according to a reassessment published by Naomi Eisenberger and colleagues in September within Biopsychosocial Science and Medicine. While a landmark 1999 study claimed distressed caregivers faced a 63 percent higher mortality risk, recent investigations show that biological stress responses and human empathy may buffer caregivers against systemic inflammation.
Caregivers Do Not Typically Show Systemic Inflammation
- Systemic Inflammation: Chronic stress typically triggers immune system changes that lead to inflammation, but large-scale blood biomarker analyses show this does not happen to most caregivers.
- The Sickness Factor: Historical data comparing spousal caregivers to healthy controls often conflated the mortality risks of having a severely ill partner with the act of caregiving itself.
Early Study Claims Caregiving Increases Mortality Risk
The idea that caregiving kills first emerged in the scientific literature nearly three decades ago. In 1999, psychiatrists Richard Schulz and Scott Beach reported in the Journal of the American Medical Association that distressed caregivers were 63 percent more likely to die within four years than non-caregivers. That finding has since been cited almost 5,300 times.
However, Eisenberger and colleagues argue that the original study suffered from design limitations. Schulz and Beach compared mortality rates across a period from over 800 individuals, tracking spousal caregivers alongside controls with nondisabled spouses. When researchers isolated distressed spousal caregivers, 17 percent died during the study period compared with 9 percent of control group members.
Yet buried in the original data was another finding: individuals not providing care to their disabled spouses still died at the same rate as caregivers experiencing distress. Having a sick or disabled spouse, rather than the active status of caregiving, accounted for the elevated mortality likelihood.
Evaluating the Biological Impact of Caregiving Stress
It is widely accepted that chronic stress triggers systemic inflammation, compromising immune function over time. In theory, stressed caregivers should display elevated inflammatory biomarkers. However, a 2020 study published in the Proceedings of the National Academy of Sciences examined blood samples from roughly 250 people who transitioned to regular caregiving and found no relative increase in six key inflammation-related biomarkers.
| Study / Publication Year | Primary Focus | Key Finding |
|---|---|---|
| Schulz & Beach (1999) | Spousal caregiving and mortality | Distressed caregivers showed a 63 percent higher four-year mortality risk compared to healthy controls. |
| PNAS (2020) | Inflammatory biomarkers in caregivers | Blood samples from regular caregivers showed no elevation in inflammation-related biomarkers relative to controls. |
| Eisenberger et al. | Biopsychosocial Science and Medicine | Caregiving links with living longer when balanced by human prosocial and evolutionary buffering mechanisms. |
Balancing Strain and Purpose in Public Health
Despite these documented hardships, framing caregiving as entirely negative can create unintended barriers. Sociologist and gerontologist Rebecca Utz of the University of Utah notes the delicate balance required in public messaging.
References
- Schulz, R., & Beach, S. R. (1999). Caregiving as a risk factor for mortality: The Caregiver Health Effects Study. Journal of the American Medical Association, 282(23), 2215-2219.
- Schulz, R., et al. (2009). Caregiving behavior is associated with decreased mortality risk. Psychological Science, 20(2), 175-181.
- Eisenberger, N., et al. Biopsychosocial Science and Medicine.
- Proceedings of the National Academy of Sciences (2020). PNAS, 117(12).
- AARP and National Alliance for Caregiving (2025). AARP Report.
