How Social Connection Impacts Individual Health and Well-Being

Chapter 2: How Social Connection Impacts Individual Health and Well-Being

Authors: Office of the Surgeon General of the United States
Published In: Our Epidemic of Loneliness and Isolation: The U.S. Surgeon General’s Advisory on the Healing Effects of Social Connection and Community, pp. 23–35. Date: 2023

Overview of Social Connection and Health Outcomes

  • Extensive scientific findings from multiple disciplines (epidemiology, neuroscience, medicine, psychology, sociology) indicate that social connection is a significant predictor of:
    • Longevity
    • Better physical health
    • Better cognitive health
    • Better mental health
  • Conversely, social isolation and loneliness are significant predictors of:
    • Premature death
    • Poor health.
  • Benefits of social connection extend beyond health, influencing:
    • Educational attainment
    • Workplace satisfaction
    • Economic prosperity
    • Overall feelings of well-being and life fulfillment.

Individual Health Outcomes

Survival and Mortality

  • Research over four decades shows lacking social connection correlates with a dramatically increased risk of early death from all causes.

  • The 2020 Consensus Study Report by National Academies of Sciences, Engineering, and Medicine states that:

    • Socially connected individuals tend to live longer.

  • In population studies:

    • Healthy individuals with ample social connections live longer.
    • Those facing social deficits (isolation, loneliness, poor-quality relationships) tend to die earlier.

  • Initial large-scale longitudinal study in 1979 documented that

    • Individuals lacking social connections were over twice as likely to die within the follow-up period, even when controlling for:
    • Age
    • Health status
    • Socioeconomic status
    • Health practices.

  • Recent estimates from 148 studies suggest:

    • Social connection increases survival odds by 50%.

  • The comparison of effects

    • Comparable to lifestyle factors: smoking, alcohol consumption;
    • Traditional clinical risk factors: blood pressure, body mass index, cholesterol levels;
    • Environmental factors: air pollution;
    • Clinical interventions: flu vaccine, high blood pressure medication.

Key Data

  • 50% increase in odds of survival associated with social connection in a synthesis of 148 studies with an average follow-up of 7.5 years.

Risks of Lack of Social Connection

  • Danger Comparison: Lacking social connection is as dangerous as smoking 15 cigarettes per day.
  • Established as an independent risk factor for premature deaths from all causes, including
    • Diseases.

Cardiovascular Disease

  • Evidence linking social connection to physical health is strongest concerning: heart disease and stroke outcomes.
  • Studies have shown that:
    • Social isolation and loneliness significantly increase morbidity risk from these conditions.
    • A synthesis across 16 longitudinal studies reveals:
    • 29% increase in risk of heart disease related to poor social relationships, and 32% for stroke.
  • Early-life social isolation portends increased cardiovascular risk factors in adulthood.
  • The American Heart Association (2022) recognizes:
    • Social isolation and loneliness are underrecognized determinants of cardiovascular health and brain health.
  • Heart failure patients with high loneliness levels:
    • Experienced a 68% increase in hospitalization risk, 57% in emergency visits, and 26% in outpatient visits compared to those with low loneliness levels.
  • Key Data:
    • Poor social connection linked to a 55% greater risk of hospital readmission among heart failure patients.

Hypertension

  • High blood pressure (hypertension) is a leading cause of cardiovascular disease.
  • Studies reveal:
    • Higher levels of social support reduce the risk of developing hypertension, particularly in higher-risk populations (e.g., Black Americans).
  • Those with extensive social support were associated with:
    • 36% lower risk of hypertension in the long term.
  • Among older adults, social isolation impact exceeds other major clinical risk factors (e.g., diabetes).

Diabetes

  • Over the last 25 years, substantial evidence suggests social context impacts the development and management of diabetes.
  • Population studies reveal:
    • Social isolation linked to increased risk of type 2 diabetes.
    • Social connection enhances management and self-rated health among individuals with diabetes.
  • Family support correlates with improved management of type 1 and type 2 diabetes.
  • Smaller social networks linked to diagnosed type 2 diabetes and complications.
  • Chronic loneliness affects diabetic outcomes through self-care behaviors.

Infectious Diseases

  • Individuals with poor social connections demonstrate increased susceptibility to infectious diseases due to weaker immune responses.
  • Studies show:
    • Loneliness and poor social support contribute to illness development and severity (common cold, flu exposure).
    • Those with rich social ties had a four-fold lower risk of developing a cold, even when adjusting for exposure.
  • Crucial findings regarding the immune response to COVID-19 vaccination show a lack of social connection correlates with weaker antibody responses.

Cognitive Function

  • Evidence links social isolation and loneliness to accelerated cognitive decline and dementia risk, particularly Alzheimer’s disease.
  • Chronic loneliness increases dementia risk by approximately 50% in older adults.
  • A 12-year study highlighted cognitive decline at 20% faster rates amongst lonely individuals.
  • Protecting against dementia perhaps involves wider social networks and engagement.

Depression and Anxiety

  • Social withdrawal often contributes to dementia risks.
  • Systematic reviews indicate:
    • Odds of developing depression more than double for chronic loners.
  • Both isolation and loneliness independently boost likelihood of mental health issues.
  • Social connection serves as a protective factor shielding those with higher risk for depression, per adverse life circumstances.

Mechanisms Linking Social Connection and Health

Pathways Through Which Social Connection Influences Health

  • Research identifies biological, psychological, and behavioral pathways critical in determining health outcomes.

Biological Pathways

  • Early life social connection influences biological risk and protection from disease across the life span.
  • Social connections affect:
    • Cardiovascular and neuroendocrine regulation, immunity, and gut-microbiome interactions.
  • Chronic inflammation has been implicated in many illnesses; decreased social ties elevate inflammation levels comparable to inactivity.

Psychological Processes

  • Psychological paths include deriving meaning and purpose from social ties, motivating self-regulation in health goals.
  • Higher social connection correlates with health-promoting benefits due to supportive relationships and reduced perceived stress.

Behavioral Influences

  • Social connection impacts lifestyle behaviors, from diet to adherence in clinical practices.
    • Social norms dictate health-related behaviors, influencing lifestyle choices.

Educational and Economic Benefits of Social Connection

Educational Outcomes

  • Positive relationships among youth yield improved academic outcomes.
    • Mentoring programs tied to better attendance, grades, and achievement scores.
  • Schools and family connectedness predict future educational achievements.

Economic Benefits

  • Workplace social environment associates with employee satisfaction and creativity, contributing to economic stability.
  • Cross-class social networks foster upward mobility, influencing job attainments and economic outcomes.

References

  • National Academies of Sciences Engineering and Medicine (NASEM). Social Isolation and Loneliness in Older Adults: Opportunities for the Health Care System. Washington, DC: The National Academies Press; 2020.
  • Holt-Lunstad J. Why Social Relationships Are Important for Physical Health: A Systems Approach to Understanding and Modifying Risk and Protection. Annu Rev Psychol. 2018;69:437-458.
  • Cohen S, Wills TA. Stress, Social Support, and the Buffering Hypothesis. Psychological Bulletin. 1985;98:310-357.
  • Holt-Lunstad J, Smith TB, Baker M, Harris T, Stephenson D. Loneliness and Social Isolation as Risk Factors for Mortality: A Meta-analytic Review. Perspect Psychol Sci. 2015;10(2):227-237.
  • Akhter-Khan SC, Tao Q, Ang TFA, et al. Associations of Loneliness with Risk of Alzheimer’s Disease Dementia in the Framingham Heart Study. Alzheimer’s & Dementia. 2021;17(10):1619-1627.