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Updated: Sep 20, 2025

Measuring Frailty in HIV-infected Individuals. Identification of Frail Patients is the First Step to Amelioration and Reversal of Frailty
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Measuring Frailty in HIV-infected Individuals. Identification of Frail Patients is the First Step to Amelioration and Reversal of Frailty

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Frailty and the Risk of Delirium: A Mendelian Randomization Study

Miao Yu1, Baohua Li

  • 1Author Affiliations: Department of Nursing (Ms Yu), Department of Neurology (Mrs Li), Peking University Third Hospital, Beijing, PR China.

Critical Care Nursing Quarterly
|May 27, 2025
PubMed

Insights

This study used Mendelian randomization to investigate the causal link between frailty and delirium. Findings suggest that a higher frailty index causally increases the risk of developing delirium.

Area of Science:

  • Gerontology
  • Critical Care Medicine
  • Genetics

Background:

  • Observational studies suggest a link between frailty and delirium, but findings are inconsistent.
  • Understanding the causal relationship is crucial for effective clinical interventions.

Purpose of the Study:

  • To determine the potential causal effect of frailty on delirium risk using Mendelian randomization.
  • To provide evidence for early identification and management strategies for frail patients at risk of delirium.

Main Methods:

  • Utilized summary-level data from genome-wide association studies (GWAS) for frailty index (FI) and delirium.
  • Employed Mendelian randomization (MR) analysis, specifically the inverse variance weighted (IVW) method, to assess causality.

Main Results:

  • Mendelian randomization analysis revealed a significant causal association between genetically predicted frailty index and an elevated risk of delirium (OR: 2.85, P=0.04).

Conclusions:

  • Genetically predicted frailty is a causal risk factor for delirium.
  • Recommends early frailty identification in intensive care units and individualized care plans, including nutrition and pre-rehabilitation, to mitigate delirium risk.
Keywords:
Mendelian randomizationdeliriumfrailtygenetic variant

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