Cited by 216Health disparities and outcomesDeath Anxiety and Social ExclusionAttachment and Relationship Dynamics

Social isolation: an underappreciated determinant of physical health

Open access
Holt-Lunstad, Julianne, Steptoe, Andrew·2022·Current Opinion in Psychology

Abstract

While a sizable body of research demonstrates the associations between social connection and health, much of the recent focus in the broader public and to some extent among academics has been on loneliness, with more objective/structural aspects often assumed to be proxies for more influential relationship factors such as relationship functions and quality. However, evidence suggests the actual presence of others (proximity and regular contact) is essential, and many studies document these structural indicators have just as powerful and, in some cases, more potent effects on indicators of health and well-being. This paper summarizes the evidence on social isolation and health and provides a framework for why social isolation may be a powerful predictor of health and mortality.

Integrity signals

Registry

Crossref · 10.1016/j.copsyc.2021.07.012

Cites

47 of 47 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Claims the paper makes

0 of 42 cited sources checked · 0 supported · 0 flagged

  • Premisecitation

    Most studies look at components of social connection separately rather than testing their combined or additive effects.

    “While this multi-factorial approach has been applied to some extent [5], much of the research does not examine the synergistic or additive influence of these components but instead examines each in parallel with some aspects more commonly examined than others [1].”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [1] 2020

      Not checked in the free run.

  • Interpretationreasoning

    The construct of social isolation might reflect a fragile social base that creates considerable vulnerability.

    “It proposes that social isolation, as a construct, may represent a weak social foundation leading to significant vulnerability.”
    Quote in the paperNot a substantial claim
  • Premisecitation

    Studies have shown that social relationships have long-term consequences for health.

    “Over the past several decades, research has amassed documenting the long-term health effects of social relationships [1].”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [1] 2020

      Not checked in the free run.

  • Interpretationreasoning

    The significance of social isolation for health and well-being might be undervalued.

    “Thus, the relative importance of social isolation for health and well-being may be underappreciated.”
    Quote in the paperNot a substantial claim
  • Premisecitation

    Each element of social connection appears to make a meaningful contribution to either health risk or protection.

    “The evidence suggests each of the components of social connection significantly contributes to health risk or protection [2,4].”
    Quote in the paperSubstantial claim0 of 2 sources checked
    • cites [2] Holt-Lunstad, 2017, Advancing social connection as a public health priority in the United States, Am Psychol source

      Not checked in the free run.

    • cites [4] Holt-Lunstad, 2018, Why social relationships are important for physical health: a systems approach to understanding and modifying risk and protection, Annu Rev Psychol source

      Not checked in the free run.

  • May combine two claims. 23
  • Classified as probably not a substantial claim. 4
  • May combine two claims.

    Premisecitation

    The physical presence of others, including proximity and frequent contact, appears essential, and structural measures can have effects on health and well-being that are as strong or stronger than other relationship features.

    “Nonetheless, evidence suggests the actual presence of others-including the existence of relationships and roles, proximity, and regular contact--is a powerful, in some cases stronger predictor of health than other aspects of relationships [2,10].”
    Quote in the paperSubstantial claim0 of 2 sources checked
    • cites [2] Holt-Lunstad, 2017, Advancing social connection as a public health priority in the United States, Am Psychol source

      Not checked in the free run.

    • cites [10] Steptoe, 2013, Social isolation, loneliness, and all-cause mortality in older men and women, Proc Natl Acad Sci U S A source

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    People are social beings, and being near others and engaging in social behavior is vital for development, reproduction, health, and survival.

    “Humans are a social species, and the proximity of others and social behavior is critical for development, reproduction, health, and survival [11].”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [11] Chen, 2018, Neural circuit mechanisms of social behavior, Neuron source

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    Multiple large epidemiological studies show strong links between social isolation and death, with effect sizes similar to those of standard clinical risk factors.

    “Since then, several large-scale epidemiological studies have documented robust associations between social isolation and mortality [17][18][19][20][21], demonstrating effects comparable to traditional clinical risk factors [22].”
    Quote in the paperSubstantial claim0 of 2 sources checked
    • cites [17] Park, 2021, Association of social isolation of long-term care facilities in the United States with 30-day mortality, JAMA Netw Open source

      Not checked in the free run.

    • cites [22] Pantell, 2013, Social isolation: a predictor of mortality comparable to traditional clinical risk factors, Am J Publ Health source

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    Isolated animals face higher risks for harmful outcomes such as death, poorer stroke recovery, and changes in gut microbiome.

    “These studies show that animals housed in isolation are at greater risk for various deleterious outcomes, including mortality, recovery from a stroke [12], and alterations in the gut microbiome [13].”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites [12] Verma, 2016, Reversal of the detrimental effects of post-stroke social isolation by pair-housing is mediated by activation of BDNF-MAPK/ERK in aged mice, Sci Rep source

      Not checked in the free run.

    • cites [13] Donovan, 2020, Social isolation alters behavior, the gut-immune-brain axis, and neurochemical circuits in male and female prairie voles, Neurobiol Stress source

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S2 (checkable).

    Premisecitation

    A model of social connection that includes structure, function, and quality is essential for grasping the pathways that lead to health risk or protection.

    “These findings have led some researchers to propose a multi-factorial approach to social connections, including the structure, function, and quality of relationships, which is critical in understanding the full scope of potential pathways to health risk when insufficient and heath protection when present [2,4].”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites [2] Holt-Lunstad, 2017, Advancing social connection as a public health priority in the United States, Am Psychol source

      Not checked in the free run.

    • cites [4] Holt-Lunstad, 2018, Why social relationships are important for physical health: a systems approach to understanding and modifying risk and protection, Annu Rev Psychol source

      Not checked in the free run.

  • May combine two claims.

    Interpretationreasoning

    Social isolation is a key element within a multi-factorial model of social connection and carries substantial independent risk for health and mortality.

    “It argues that social isolation is a critical factor in a broader multi-factorial conceptualization of social connection that conveys significant independent risk to health and mortality.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Premisecitation

    In the Amsterdam Longitudinal Study of Ageing, loneliness, not isolation, predicted death among men but not women.

    “By contrast, the Amsterdam Longitudinal Study of Ageing found loneliness rather than isolation predicted mortality in men but not women [32].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [32] Holwerda, 2012, Increased risk of mortality associated with social isolation in older men: only when feeling lonely? Results from the Amsterdam Study of the Elderly (AMSTEL), Psychol Med source

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    A recent expert consensus report concluded that the strongest evidence for isolation and morbidity concerns cardiovascular and mental health, with less research on other outcomes.

    “Generally, according to a recent expert consensus report, the evidence linking social isolation to morbidity outcomes is strongest for the association between social isolation and cardiovascular and mental health outcomes, with fewer studies examining relationships to other health outcomes [1].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [1] 2020

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    A meta-analysis of 70 prospective studies reported that social isolation was linked to a 29% higher risk of premature death from any cause, while loneliness was linked to a 26% higher risk.

    “For example, one meta-analysis of 70 prospective studies found that social isolation was associated with 29% and loneliness a 26% increased risk for premature mortality from all causes [23].”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [23] Holt-Lunstad, 2015, Loneliness and social isolation as risk factors for mortality: a meta-analytic review, Perspect Psychol Sci source

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    Studies show that isolation alters immune responses and promotes inflammation.

    “For example, research demonstrates social isolation modulates immune responses and induces inflammation [40,41].”
    Quote in the paperSubstantial claim0 of 2 sources checked
    • cites [40] Powell, 2013, Social stress up-regulates inflammatory gene expression in the leukocyte transcriptome via β-adrenergic induction of myelopoiesis, Proc Natl Acad Sci U S A source

      Not checked in the free run.

    • cites [41] Cole, 2015, Myeloid differentiation architecture of leukocyte transcriptome dynamics in perceived social isolation, Proc Natl Acad Sci U S A source

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    One study found that both isolation (measured by small network size) and loneliness independently predicted weaker antibody responses to flu vaccination, and those who were both isolated and lonely had the weakest response.

    “In one study, social isolation (as indicated by small network size) and loneliness were both independently associated with lower antibody responses to an influenza vaccine; however, those who were both lonely and isolated had the lowest antibody response [42].”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [42] Pressman, 2005, Loneliness, social network size, and immune response to influenza vaccination in college freshmen, Health Psychol source

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    While single indicators like living alone have been linked to higher type 2 diabetes risk, broader isolation measures have not been associated with diabetes onset.

    “For example, although individual components of isolation, such as living alone, have been associated with increased risk of Type 2 diabetes [37] more comprehensive measures have not been associated with diabetes onset [38].”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites [37] Meisinger, 2009, Living alone is associated with an increased risk of type 2 diabetes mellitus in men but not women from the general population: the MONICA/KORA Augsburg Cohort Study, Psychosom Med source

      Not checked in the free run.

    • cites [38] Hackett, 2020, Loneliness and type 2 diabetes incidence: findings from the English Longitudinal Study of Ageing, Diabetologia source

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    In over 450,000 UK Biobank participants, neither isolation nor loneliness predicted a first heart attack, but isolation did predict death among those with prior cardiovascular disease or stroke.

    “For example, an analysis of more than 450,000 participants in the UK Biobank tested associations between social isolation, loneliness, and acute myocardial infarction (MI). Neither factor was associated with first MI, but social isolation predicted mortality among people with a history of cardiovascular disease or stroke [29].”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [29] Hakulinen, 2018, Social isolation and loneliness as risk factors for myocardial infarction, stroke and mortality: UK Biobank cohort study of 479 054 men and women, Heart source

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    A meta-analysis of longitudinal studies found that both isolation and loneliness raised the risk of new coronary heart disease and stroke, with no indication that either was more strongly linked to disease onset.

    “In a meta-analysis of longitudinal studies of social isolation and loneliness and cardiovascular outcomes, both social isolation and loneliness were found to significantly increase the risk for new CHD and stroke, with no evidence that one was more strongly related to disease incidence than the other [33].”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [33] Valtorta, 2016, Loneliness and social isolation as risk factors for coronary heart disease and stroke: systematic review and meta-analysis of longitudinal observational studies, Heart source

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    Three waves of nationally representative data indicate that network size, non-kin ties, and community involvement remain stable.

    “Data from three waves of nationally representative data shows size of one's network, non-kin ties, and community involvement to be stable [45].”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [45] Cornwall, 2021, Homeostasis revisited: patterns of stability and rebalancing in older adults' social lives, J Gerontol B Psychol Sci Soc Sci source

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    Findings on group-based interventions are inconsistent and may require tailoring to individual needs.

    “However, the evidence on group-based interventions is mixed [1] and may need to be tailored to be more responsive to individual needs [1].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [1] 2020

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Interpretationreasoning

    These findings do not reduce the importance of relationship functions or quality.

    “The evidence does not diminish the importance of relationship functions (e.g., social support) or quality (e.g., relationship satisfaction, loneliness).”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Premisecitation

    A meta-analysis of over 2.3 million participants from cohort and case-control studies found isolation raised dementia risk, whereas loneliness was not significantly linked to risk.

    “A meta-analysis of cohort and case-control studies involving more than 2.3 million participants found that social isolation was associated with increased risk for dementia while loneliness was not significantly associated with risk [36].”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [36] Penninkilampi, 2018, The association between social engagement, loneliness, and risk of dementia: a systematic review and meta-analysis, J Alzheim Dis

      Not checked in the free run.

  • May combine two claims.

    Interpretationreasoning

    A structural base is required, though it might not be enough on its own.

    “In other words, the structural foundation is necessary but may not be sufficient.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S2 (checkable). May combine two claims.

    Interpretationreasoning

    As the structural base becomes narrower or gaps widen, a person becomes more isolated, and other social components may become more fragile and vulnerable.

    “The narrower the foundation and/or the wider any gaps, the more socially isolated an individual is, and the more tenuous and vulnerable the other social components may become.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Premisecitation

    A Chinese study of 1,267 older adults with cardiovascular disease found isolation predicted higher ten-year mortality after adjusting for other risk factors, whereas loneliness did not.

    “An investigation of 1,267 older people with cardiovascular disease in China reported that social isolation was linked to increased mortality risk over ten years after taking other risk factors into account, while loneliness was not [27].”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [27] Yu, 2020, Social isolation, loneliness, and all-cause mortality in patients with cardiovascular disease: a 10-year follow-up study, Psychosom Med source

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    The overall effect sizes for isolation and loneliness on mortality did not differ statistically, indicating they may predict death risk equally well.

    “Despite these relative differences, the aggregate effect sizes were not statistically different, suggesting both social isolation and loneliness may equivalently predict mortality risk.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [23] Holt-Lunstad, 2015, Loneliness and social isolation as risk factors for mortality: a meta-analytic review, Perspect Psychol Sci source

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    Other evidence indicates that isolation is linked to greater inflammation, while loneliness is linked to worse inflammation regulation, implying that objective and subjective social factors may act through distinct biological routes.

    “Additional evidence further suggests aspects of social isolation were associated with higher levels of inflammation, whereas loneliness was associated with poorer regulation of inflammation, suggesting objective and subjective aspects of social connections may influence different biological pathways [43].”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [43] Walker, 2019, Social engagement and loneliness are differentially associated with neuro-immune markers in older age: time-varying associations from the English Longitudinal Study of Ageing, Brain Behav Immun source

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S2 (checkable).

    Interpretationreasoning

    Social isolation should be included as a key and necessary part of a multi-factorial model of social health and health risk.

    “Instead, it underscores the evidence supporting the inclusion of social isolation as a significant and necessary component of the multi-factorial understanding of social health and health risk.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Premisecitation

    Evidence is accumulating that links social isolation to nonfatal health conditions such as cardiovascular disease, stroke, pre-diabetes, type 2 diabetes, and worse cognitive function.

    “There is also a growing body of evidence relating social isolation with nonfatal physical health outcomes, including increased risk for cardiovascular disease and stroke [33], pre-diabetes and type 2 diabetes [34], and poorer cognitive functioning [35].”
    Quote in the paperSubstantial claim0 of 3 sources checked
    • cites [33] Valtorta, 2016, Loneliness and social isolation as risk factors for coronary heart disease and stroke: systematic review and meta-analysis of longitudinal observational studies, Heart source

      Not checked in the free run.

    • cites [34] Brinkhues, 2017, Socially isolated individuals are more prone to have newly diagnosed and prevalent type 2 diabetes mellitus - the Maastricht study, BMC Publ Health source

      Not checked in the free run.

    • cites [35] Evans, 2019, Social isolation and cognitive function in later life: a systematic review and meta-analysis, J Alzheimers Dis source

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    Social group interventions have been shown to increase social connection, improve mental health, and help manage mild to moderate depression.

    “Interventions involving social groups demonstrate effects of greater social connection, better mental health [46], and better management of mild-moderate depression [47].”
    Quote in the paperSubstantial claim0 of 2 sources checked
    • cites [46] Haslam, 2016, Groups 4 Health: evidence that a social-identity intervention that builds and strengthens social group membership improves mental health, J Affect Disord source

      Not checked in the free run.

    • cites [47] Dingle, 2021, The effects of social group interventions for depression: systematic review, J Affect Disord source

      Not checked in the free run.

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  • The paper relies on this without support.

    Social ties influence health and well-being through meeting physical, emotional, and cognitive needs.

    “Social relationships affect health and well-being via fulfilling a variety of physical, emotional, and cognitive needs.”
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Each contradiction between two passages listed here was confirmed by an independent check.

  • Conflicting sample sizes for the same study

    Minor

    The discussion describes study [27] as involving 1,267 people, but the annotation for reference [27] says the cohort had 1,265 patients.

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Authors
Holt-Lunstad, J., & Steptoe, A.
Affiliations
University College London (GB)
Venue
Current Opinion in Psychology
Publisher
Elsevier BV
Published
2022-02
Volume
43
Pages
232-237
ISSN
2352-250X (ISSN-L)
OpenAlex
W3185007021
Cited by
216
References
47
Citations by year
2026: 49 · 2025: 61 · 2024: 48 · 2023: 34 · 2022: 23 · 2021: 1
FWCI
2.85
Type
journal article
Language
en
Open access
Locations
  • Current Opinion in Psychology (publishedVersion)
  • PubMed (publishedVersion)
  • UCL Discovery (University College London) (submittedVersion)
Topics
  • Social Sciences › Health › Health disparities and outcomes
  • Social Sciences › Psychology › Social Psychology › Death Anxiety and Social Exclusion
  • Social Sciences › Psychology › Social Psychology › Attachment and Relationship Dynamics
Keywords
social isolation, physical health, mortality, social connectedness, loneliness, social proximity, social contact, well-being, relationship quality
MeSH terms
Humans, Loneliness, Social Isolation

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