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Associations between body mass index categories and geriatric assessment tests among older adults with chronic kidney

Yelda Deligöz Bildaci1, Cihan Heybeli1, Lee Smith2

  • 1Division of Nephrology, Department of Internal Medicine, Dokuz Eylul University School of Medicine, Izmir, Turkey.

Nutrition in Clinical Practice : Official Publication of the American Society for Parenteral and Enteral Nutrition
|August 4, 2025
PubMed

Insights

The optimal body mass index (BMI) for older adults with chronic kidney disease (CKD) is between 30.0-34.9 kg/m². This range shows the best results in nutritional status, cognitive function, and mood.

Area of Science:

  • Geriatric Medicine
  • Nephrology
  • Nutritional Science

Background:

  • Optimal body mass index (BMI) for older adults with chronic kidney disease (CKD) remains unestablished.
  • This study examines the association between BMI and Comprehensive Geriatric Assessment (CGA) parameters in elderly CKD patients.

Purpose of the Study:

  • To determine the ideal BMI range for geriatric assessment in older adults with CKD.
  • To investigate the relationship between various BMI categories and CGA outcomes.

Main Methods:

  • Included 319 older adults diagnosed with CKD.
  • Compared demographic, laboratory, and CGA data across BMI categories (18.5-24.9, 25.0-29.9, 30.0-34.9, >35.0 kg/m²).
  • Utilized logistic regression to analyze associations between CGA parameters and BMI categories.

Main Results:

  • A BMI range of 25.0-35.0 kg/m² demonstrated the most favorable CGA scores.
  • Patients with BMI 30.0-34.9 kg/m² exhibited superior scores in Mini Nutritional Assessment (MNA) and Geriatric Depression Scale (GDS) compared to those with BMI 25.0-29.9 kg/m².
  • The BMI range of 30.0-34.9 kg/m² was associated with optimal nutrition, cognitive function, and mood status.

Conclusions:

  • The optimal BMI range for older adults with CKD, considering nutritional status, cognitive health, and mood, is 30.0-34.9 kg/m².
  • This BMI range may support better overall health outcomes in this population.
Abstract

Keywords:
agedbody mass indexchronicfrailtymalnutritionrenal failure

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