Geriatric Nutritional Risk Index as a Predictor of Major Adverse Limb Events in Older Patients With Peripheral Artery

Xiaoyu Liu1, Xinjun Liu2, Qin Chen1,3

  • 1School of Nursing, Southwest Medical University, Luzhou, Sichuan, China.

PubMed

Insights

The Geriatric Nutritional Risk Index (GNRI) predicts major adverse limb events (MALE) in elderly patients with peripheral artery disease (PAD). A GNRI below 95 significantly increases MALE risk, highlighting the need for nutritional monitoring.

Area of Science:

  • Geriatric Medicine
  • Cardiovascular Research
  • Nutritional Science

Background:

  • The Geriatric Nutritional Risk Index (GNRI) is a known predictor of adverse outcomes in chronic diseases.
  • Its prognostic value for major adverse limb events (MALE) in elderly patients with peripheral artery disease (PAD) was previously unestablished.

Purpose of the Study:

  • To investigate the association between GNRI and the risk of MALE in elderly patients diagnosed with PAD.
  • To determine the prognostic utility of GNRI for MALE in this specific patient population.

Main Methods:

  • A multicenter, prospective study involving 1200 elderly patients (≥60 years) with PAD.
  • Patients were stratified based on GNRI values (At-risk: ≤98 vs. No-risk: >98).
  • Statistical analyses included Kaplan-Meier curves, multivariable Cox regression, and restricted cubic spline (RCS) modeling.

Main Results:

  • Among 1036 completers, 26.5% developed MALE during a mean follow-up of 18.9 months.
  • Higher MALE incidence was observed in the At-risk GNRI group (log-rank p < 0.001).
  • Adjusted Cox models showed a 45% increased MALE risk for the At-risk group (HR 1.45). RCS identified a non-linear L-shaped relationship, with MALE risk significantly decreasing with GNRI increases below 95 (p < 0.001).

Conclusions:

  • GNRI demonstrates a significant non-linear, L-shaped association with MALE risk in elderly PAD patients.
  • The prognostic utility is most critical for patients with GNRI below the 95 inflection point.
  • Routine GNRI monitoring and nutritional interventions for patients with GNRI < 95 are recommended to mitigate MALE risk.
Abstract

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