{
  "abstract": "Background: Stroke is associated with accelerated cognitive decline in older adults, but whether social support and family connections statistically moderate this association has rarely been tested formally in longitudinal, cross-national data.\n\nMethods: We analyzed the China Health and Retirement Longitudinal Study (CHARLS; N = 11,569; Wave 1 [2011] baseline to Wave 4 [2018], up to 7.2 years) and the English Longitudinal Study of Ageing (ELSA; N = 5,713; Wave 3 [2006–2007] baseline to Wave 9 [2019], up to 13.0 years). Cognitive function was assessed with a harmonized composite (orientation, immediate and delayed word recall, plus pentagon drawing in CHARLS). Linear mixed-effects models with random intercepts and slopes estimated the incident-stroke × time interaction (annual cognitive decline, points/year), adjusting for age, sex, BMI, education, marital status, smoking, drinking, comorbidity count, and residence (CHARLS only). A three-way interaction (stroke × social support/family connection × time) formally tested moderation. Propensity-score matching (1:2 nearest-neighbor) and subgroup analyses (age, sex, education) served as sensitivity analyses.\n\nResults: Incident stroke occurred in 770 CHARLS (6.6%) and 347 ELSA (6.1%) participants. In fully adjusted models, stroke was associated with significantly faster cognitive decline in both cohorts (CHARLS: β = −0.068 points/year, 95% CI − 0.123 to − 0.013, p = 0.016; ELSA: β = −0.190, 95% CI − 0.229 to − 0.152, p < 0.001); after propensity-score matching, the ELSA association remained robust (β = −0.150, p < 0.001) while the CHARLS estimate was attenuated and no longer significant (β = −0.029, p = 0.386). The formal three-way interaction showed that higher family connection significantly attenuated stroke-related decline in ELSA ; the corresponding interaction for social support in CHARLS was directionally consistent but not significant (β = +0.082, 95% CI − 0.037 to 0.202, p = 0.177). Subgroup analyses showed a significant stroke-decline association across all age, sex, and education strata in ELSA, and only among male and less-educated participants in CHARLS.\n\nConclusion: Incident stroke was associated with faster cognitive decline in both a Chinese and an English cohort of middle-aged and older adults.\n\nA formal statistical test indicated that family connections significantly moderated this association in ELSA, whereas a similar but non-significant pattern was observed for social support in CHARLS.\n\nThese associations warrant further investigation of social relationships as a potentially modifiable factor in post-stroke cognitive health; the observational design precludes causal conclusions.\n\nSupplementary Information: The online version contains supplementary material available at https://doi.org/10.1186/s12889-026-28890-0.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Thoracic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province 430030 China",
    "Department of Neurosurgery, Western Theater Command Air Force Hospital, Chengdu, Sichuan Province 6000211 China"
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 4,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "Mingdong Li"
    },
    {
      "affs": [
        0
      ],
      "name": "Kewei Xiao"
    },
    {
      "affs": [
        1
      ],
      "name": "Chaoli Song"
    },
    {
      "affs": [
        0
      ],
      "name": "Shengrong Long"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/edwcfsf9mz60e.bib",
  "cited_by": 0,
  "doi": "10.1186/s12889-026-28890-0",
  "fulltext_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC13729641/",
  "id": "edwcfsf9mz60e",
  "issns": [
    "1471-2458"
  ],
  "landing_url": "https://doi.org/10.1186/s12889-026-28890-0",
  "language": "en",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "heading",
      "Research"
    ],
    [
      "openalex",
      "2738|Dementia and Cognitive Impairment Research"
    ]
  ],
  "openalex": "W7196995654",
  "pdf_url": null,
  "pmcid": "PMC13729641",
  "pmid": "42977948",
  "published": "2026-08-06",
  "publisher": "BMC",
  "ris": "https://research.draconitic.com/paper/edwcfsf9mz60e.ris",
  "sources": [
    {
      "first_seen": "2026-11-07T12:22:21Z",
      "native_id": "PMC13729641",
      "source": "pmc",
      "url": "https://doi.org/10.1186/s12889-026-28890-0"
    }
  ],
  "subjects": [
    {
      "field": "medicine",
      "origin": "openalex:2738|Dementia and Cognitive Impairment Research",
      "subfield": "psychiatry"
    }
  ],
  "title": "Stroke and cognitive decline: associations of social support and family connections in CHARLS and ELSA cohorts",
  "title_text": "Stroke and cognitive decline: associations of social support and family connections in CHARLS and ELSA cohorts",
  "type": "peer-reviewed",
  "updated_at": "2026-11-07T12:22:21Z",
  "url": "https://research.draconitic.com/paper/edwcfsf9mz60e",
  "venue": "BMC Public Health",
  "versions": []
}