For decades, loneliness has been portrayed as a dire threat to health, with some reports equating its dangers to smoking fifteen cigarettes a day. Influential voices, including the U.S. Surgeon General, have amplified the concern, framing social isolation as a significant public health issue with potentially fatal consequences. These perspectives have fuelled an urgency in both academic circles and policymaking to address loneliness as a contributor to premature death, particularly among older adults. Yet, new research is now challenging this prevailing narrative with surprising findings that suggest the link between loneliness and mortality may not be as clear-cut as once thought.
An international study led by researchers at the University of Waterloo’s School of Public Health Sciences has found no association between loneliness and increased risk of death among older adults receiving home care services. Drawing on data from over 380,000 individuals aged 65 and above in Canada, Finland, and New Zealand, the study employed rigorous statistical methods, including standardised assessments and survival analysis, to examine whether feelings of loneliness predicted mortality within one year. Contrary to widespread assumptions, the results showed that lonely older adults were less likely to die within a year compared to those who did not report feeling lonely, even after adjusting for age, pre-existing health conditions, and other risk factors.
“This research runs counter to much of the existing literature, which is largely based on studies of the general population,” said Dr. Bonaventure Egbujie, the study’s lead author and a professor at Waterloo. “When we isolate loneliness as a variable, independent of other health and social determinants, it does not appear to significantly increase the risk of death in this population.” The findings underscore the importance of distinguishing between correlation and causation. While loneliness may accompany poor health, it does not necessarily drive it—at least not in ways that translate into increased mortality in the short term.
The study also sheds light on the prevalence and complexity of loneliness among older adults. Rates of reported loneliness ranged from 15.9 percent in Canada to 24.4 percent in New Zealand. Interestingly, individuals who were physically healthier and received less informal support from family or friends were more likely to report feeling lonely. This counterintuitive pattern suggests that loneliness is not merely a by-product of physical frailty or intensive care needs. Still, it may instead reflect broader social or emotional dynamics, including unmet expectations for connection and engagement.
Rather than dismissing loneliness as benign, however, the researchers emphasise that its impact on mental health remains profound. “Loneliness is still a serious threat to psychological well-being,” noted Dr John Hirdes, senior author of the study. “Just because it doesn’t raise your risk of dying doesn’t mean it should be ignored. The emotional and cognitive toll of prolonged isolation can be deeply damaging, particularly for older people who may already be vulnerable to depression, anxiety, and cognitive decline.”
From a policy perspective, the study’s authors advocate for a reframing of how loneliness is addressed in the context of elder care. Rather than positioning it primarily as a mortality risk, they urge policymakers and care providers to treat it as a critical issue affecting quality of life. Interventions aimed at reducing loneliness should focus on enhancing meaningful social contact, promoting community engagement, and recognising the emotional needs of older adults, especially those living independently or with limited social networks. Home and community care services, the researchers argue, play a pivotal role in this regard.
Ultimately, the study recommends further longitudinal research to elucidate the long-term effects of loneliness on health and to investigate how cultural norms and variations in healthcare systems influence these outcomes. By moving beyond simplified cause-and-effect models, future studies could better capture the nuanced ways in which loneliness intersects with physical health, emotional well-being, and broader social support structures. In doing so, researchers and practitioners alike can develop more targeted, compassionate, and evidence-based strategies to support the ageing population—not just in surviving but in thriving.
More information: Bonaventure Egbujie et al, Cross-National Evidence on Risk of Death Associated with Loneliness: A Survival Analysis of 1-Year All-Cause Mortality among Older Adult Home Care Recipients in Canada, Finland, and Aotearoa | New Zealand, Journal of the American Medical Directors Association. DOI: 10.1016/j.jamda.2025.105687
Journal information: Journal of the American Medical Directors Association Provided by University of Waterloo
