Evidence map›Paper›PMID 36634152›Full record

SynthesisPloS one2023

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

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

Abstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in PloS one, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 54 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
54citing papers in PubMed, 2 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

54 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Energy constraint on human health.Trends in endocrinology and metabolism: TEM · 2026
    Review
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  17. Impact of the rollout of the national social prescribing link worker programme on population outcomes: evidence from a repeated cross-sectional survey.The British journal of general practice : the journal of the Royal College of General Practitioners · 2025
    Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Ryo NaitoPopulation Health Research Institute, McMaster University, and Hamilton Health Sciences, Hamilton, ON, Canada.
Martin McKeeDepartment of Public Health, London School of Hygiene & Tropical Medicine, London, United Kingdom.
Darryl LeongPopulation Health Research Institute, McMaster University, and Hamilton Health Sciences, Hamilton, ON, Canada.
Shrikant BangdiwalaPopulation Health Research Institute, McMaster University, and Hamilton Health Sciences, Hamilton, ON, Canada.
Sumathy RangarajanPopulation Health Research Institute, McMaster University, and Hamilton Health Sciences, Hamilton, ON, Canada.
Shofiqul IslamPopulation Health Research Institute, McMaster University, and Hamilton Health Sciences, Hamilton, ON, Canada.
Salim YusufPopulation Health Research Institute, McMaster University, and Hamilton Health Sciences, Hamilton, ON, Canada.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAlthough 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.

objectiveTo 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.

resultsData 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 < 0.00001, I² = 76%).

conclusionSocial isolation is associated with increased risk for all-cause mortality. REGISTRATION: PROSPERO (CRD42020152351).

Indexed as

Social IsolationAdultCohort StudiesHumansProspective StudiesRetrospective StudiesRisk Factors

Identifiers

PMID36634152
PMCPMC9836313

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.