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The association between bullous pemphigoid and cognitive outcomes in middle-aged and older adults: A systematic review and meta-analysis

Author

Listed:
  • Qi Zhou
  • Zhenrong Xiong
  • Dejiang Yang
  • Chongyu Xiong
  • Xinming Li

Abstract

Background: Bullous pemphigoid (BP) is a rare autoimmune skin condition that causes large fluid-filled blisters on the skin, especially in older adults. BP has been linked to various diseases and medications, but its association with cognitive outcomes is unclear. Methods: We conducted a systematic review and meta-analysis of studies investigating the association between BP and cognitive outcomes, such as all-cause dementia, Alzheimer’s disease, and vascular dementia in middle-aged and older adults. We searched PubMed, Embase, and Web of Science databases for relevant studies published up to March 2023. We included studies that reported odds ratios (ORs) or hazard ratios (HRs) with 95% confidence intervals (CIs) for the association between BP and cognitive outcomes. We pooled the ORs, or HRs using random-effects models and performed subgroup and sensitivity analyses to explore potential sources of heterogeneity. Results: The study selection process identified 13 studies for inclusion in the analysis, 11 studied arms of which used a case-control design and 7 studied arms of which used a cohort design. The studies were conducted primarily in Europe, with a few from Asia and the United States. The meta-analysis found that BP was associated with higher odds of all-cause dementia in middle-aged and older participants in both cohort studies(HR = 1.41,95% CI: 1.20–1.66, P = 0.000) and case-control (OR = 4.25, 95% CI, 2.73–6.61; P = 0.000). The study found no significant publication bias in the included studies. The meta-regression analyses identified some subgroups associated with significantly reported odds ratios in case-control association analysis, including Europe, BP diagnosed based on clinical, histology, immunofluorescence, and both adjustment status of NO and YES. Conclusions: Our meta-analysis suggests that BP is associated with an increased risk of all-cause dementia in middle-aged and older adults. Further studies are needed to elucidate the underlying mechanisms and causal relationship between BP and cognitive outcomes.

Suggested Citation

  • Qi Zhou & Zhenrong Xiong & Dejiang Yang & Chongyu Xiong & Xinming Li, 2023. "The association between bullous pemphigoid and cognitive outcomes in middle-aged and older adults: A systematic review and meta-analysis," PLOS ONE, Public Library of Science, vol. 18(11), pages 1-14, November.
    • Handle: RePEc:plo:pone00:0295135
    DOI: 10.1371/journal.pone.0295135
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    1. David Moher & Alessandro Liberati & Jennifer Tetzlaff & Douglas G Altman & The PRISMA Group, 2009. "Preferred Reporting Items for Systematic Reviews and Meta-Analyses: The PRISMA Statement," PLOS Medicine, Public Library of Science, vol. 6(7), pages 1-6, July.
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