DNP 623 Module 6 Health Promotion Literature Review Paper Example

A Risk We Rarely Ask About: Loneliness and Social Isolation in Older Adults as a Health Promotion Priority

Student Name

Edson College of Nursing and Health Innovation, Arizona State University

DNP 623: Adult-Gerontology Health Promotion

Instructor Name

Month Day, Year

A Risk We Rarely Ask About: Loneliness and Social Isolation in Older Adults as a Health Promotion Priority

Introduction

In my primary care practice, I routinely ask older adults about falls, depression and medications, but rarely about whether they feel lonely or how often they talk with anyone. Yet loneliness and social isolation are linked to health outcomes as serious as many risks we measure every day. This paper reviews the health promotion literature on loneliness and social isolation among community-dwelling older adults and proposes how primary care might respond.

Defining the Phenomenon

Social isolation is the objective shortage of social contact and relationships, such as living alone, having few friends or rarely participating in social activities. Loneliness is the subjective, distressing feeling that one's social relationships are inadequate in number or quality. The two overlap but are distinct, and each carries its own risks (National Academies of Sciences, Engineering, and Medicine, 2020). Older adults face particular vulnerability because of retirement, bereavement, chronic illness, sensory loss and reduced mobility.

Epidemiology and Health Effects

The national consensus report on this topic concluded that a significant proportion of adults aged 50 and older are socially isolated or lonely and that these conditions are associated with serious health consequences, including higher risk of premature death, heart disease, stroke, dementia, depression and anxiety (National Academies of Sciences, Engineering, and Medicine, 2020).

Mortality data are the strongest. Pooling 148 studies, an earlier review found stronger social ties carried about 50% better odds of survival, a size comparable to familiar risk factors (Holt-Lunstad et al., 2010). A more recent meta-analysis of 90 cohort studies involving more than 2.2 million adults estimated that social isolation was associated with a 32% higher risk of all-cause mortality and loneliness with a 14% higher risk (Wang et al., 2023). Because both exposures are observational, confounding by illness and depression cannot be excluded, but the consistency of findings supports treating them as genuine health risks.

Theoretical Framework

The evolutionary theory of loneliness proposes that loneliness evolved as an aversive signal, like hunger or pain, that motivates people to repair social connections because survival depended on group membership (Cacioppo & Cacioppo, 2018). The theory also explains why chronic loneliness can be harmful: it heightens vigilance for social threat, which can lead to negative expectations of others, withdrawal, poor sleep and physiological stress responses. This creates a self-reinforcing cycle in which lonely people may avoid the very contact they need.

The theory has two implications for health promotion. First, simply increasing contact may not reduce loneliness if a person's perceptions remain negative. Second, interventions that change behavior and thinking, encouraging engagement in valued activities, may break the cycle.

National Recommendations and Position Papers

The National Academies report urged the health care system to take an active role: periodically assessing patients for isolation and loneliness using validated tools, connecting them to community resources, building the evidence base for interventions, and educating the health workforce (National Academies of Sciences, Engineering, and Medicine, 2020). It noted that health care professionals are well placed to identify at-risk older adults because many interact with them regularly.

Evidence on Interventions

A systematic review and meta-analysis of 70 randomized trials in older adults found that most interventions had small effects on loneliness, with the largest effects for animal therapy and videoconferencing technology in long-term care settings (Hoang et al., 2022). Evidence in community settings was more limited and heterogeneous.

One of the largest recent trials tested a scalable approach. Among more than a thousand lonely older adults on low incomes who lived alone, telephone-based behavioral activation delivered by trained older laypersons reduced loneliness more than befriending calls at three months (Kwok et al., 2024). Behavioral activation fits the evolutionary theory's emphasis on breaking the cycle of withdrawal by scheduling meaningful activities.

Not all programs succeed. A cluster-randomized trial of a multicomponent program of home visits and telephone calls did not reduce isolation or loneliness overall (Hernández-Ascanio et al., 2022). Such results underline the need to match interventions to mechanisms and to evaluate them carefully.

Implications for Primary Care

For adult-gerontology nurse practitioners, the literature supports three steps. First, assess: ask about both loneliness and isolation at annual wellness visits using a brief validated scale, separately from depression screening. Second, act on risk factors that clinicians can modify, such as hearing loss, mobility limits and depression. Third, connect patients to interventions with evidence, such as telephone-based behavioral activation, community programs and peer support, and evaluate whether they help.

Gaps and Direction for a DNP Project

Gaps include limited evidence for interventions delivered through U.S. primary care, few studies of diverse and rural older adults, and uncertain long-term effects. A possible DNP project would implement routine loneliness screening at annual wellness visits in my practice, with referral to a trained volunteer telephone program using behavioral activation, and evaluate screening rates, referral uptake and change in loneliness scores over three months.

Conclusion

Loneliness and social isolation are common, consequential and modifiable health risks for older adults. Theory explains why they persist, national recommendations call on health care to act, and emerging trials offer scalable options. Primary care can begin simply, by asking.

References

Cacioppo, J. T., & Cacioppo, S. (2018). Loneliness in the modern age: An evolutionary theory of loneliness (ETL). Advances in Experimental Social Psychology, 58, 127-197. https://doi.org/10.1016/bs.aesp.2018.03.003

Hernández-Ascanio, J., Perula-de Torres, L. Á., Rich-Ruiz, M., González-Santos, J., Mielgo-Ayuso, J., González-Bernal, J., & ASyS Study Collaborative Group. (2022). Effectiveness of a multicomponent intervention to reduce social isolation and loneliness in community-dwelling elders: A randomized clinical trial. Nursing Open, 10(1), 48-60. https://doi.org/10.1002/nop2.1277

Hoang, P., King, J. A., Moore, S., Moore, K., Reich, K., Sidhu, H., Tan, C. V., Whaley, C., & McMillan, J. (2022). Interventions associated with reduced loneliness and social isolation in older adults: A systematic review and meta-analysis. JAMA Network Open, 5(10), e2236676. https://doi.org/10.1001/jamanetworkopen.2022.36676

Holt-Lunstad, J., Smith, T. B., & Layton, J. B. (2010). Social relationships and mortality risk: A meta-analytic review. PLoS Medicine, 7(7), e1000316. https://doi.org/10.1371/journal.pmed.1000316

Kwok, J. Y. Y., Jiang, D., Yeung, D. Y.-L., Choi, N. G., Ho, R. T. H., Warner, L. M., & Chou, K.-L. (2024). Layperson-delivered telephone-based behavioral activation among low-income older adults during the COVID-19 pandemic: The HEAL-HOA randomized clinical trial. JAMA Network Open, 7(6), e2416767. https://doi.org/10.1001/jamanetworkopen.2024.16767

National Academies of Sciences, Engineering, and Medicine. (2020). Social isolation and loneliness in older adults: Opportunities for the health care system. The National Academies Press. https://doi.org/10.17226/25663

Wang, F., Gao, Y., Han, Z., Yu, Y., Long, Z., Jiang, X., Wu, Y., Pei, B., Cao, Y., Ye, J., Wang, M., & Zhao, Y. (2023). A systematic review and meta-analysis of 90 cohort studies of social isolation, loneliness and mortality. Nature Human Behaviour, 7(8), 1307-1319. https://doi.org/10.1038/s41562-023-01617-6