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Social isolation as a risk factor for all-cause mortality: Systematic review and meta-analysis of cohort studies

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  • Ryo Naito
  • Martin McKee
  • Darryl Leong
  • Shrikant Bangdiwala
  • Sumathy Rangarajan
  • Shofiqul Islam
  • Salim Yusuf

Abstract

Background: Although several epidemiological studies have linked social isolation to increased risk of mortality, the magnitude of any effect is unclear, in part because of the use of different measures of social isolation. Objective: To examine the association between social isolation and all-cause mortality and investigate whether it differs in various subgroups or populations. Data sources: We searched for relevant studies in electronic databases: MEDLINE (1946 to December 31, 2021), EMBASE (1974 to December 31, 2021), and PsycINFO (1806 to December 31, 2021). Selection criteria: We included both prospective and retrospective cohort studies that examined the association between social isolation and all-cause mortality among adults. Data collection and analysis: Two reviewers screened and extracted data independently. We contacted study authors to obtain missing information whenever possible. Data were pooled using a random effect model to calculate estimates of the effects of social isolation on all-cause mortality. Results: Data from studies involving 1.30 million individuals were included. The pooled hazard ratio of social isolation for all-cause mortality was 1.33 (95% confidence interval; 1.26–1.41, heterogeneity: Chi² = 112.51, P

Suggested Citation

  • Ryo Naito & Martin McKee & Darryl Leong & Shrikant Bangdiwala & Sumathy Rangarajan & Shofiqul Islam & Salim Yusuf, 2023. "Social isolation as a risk factor for all-cause mortality: Systematic review and meta-analysis of cohort studies," PLOS ONE, Public Library of Science, vol. 18(1), pages 1-16, January.
    • Handle: RePEc:plo:pone00:0280308
    DOI: 10.1371/journal.pone.0280308
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    References listed on IDEAS

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    3. Pantell, M. & Rehkopf, D. & Jutte, D. & Syme, S.L. & Balmes, J. & Adler, N., 2013. "Social isolation: A predictor of mortality comparable to traditional clinical risk factors," American Journal of Public Health, American Public Health Association, vol. 103(11), pages 2056-2062.
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