Cited by 248Clinical Nutrition and GastroenterologyBody Composition Measurement TechniquesHemodynamic Monitoring and Therapy

Analysis of Estimation Methods for Resting Metabolic Rate in Critically Ill Adults

Frankenfield, David C., Coleman, Abigail, Alam, Shoaib, Cooney, Robert N.·2009·Journal of Parenteral and Enteral Nutrition

Abstract

BACKGROUND: Prediction of metabolic rate is an important part of the nutrition assessment of critically ill patients, yet there are limited data regarding the best equation to use to make this prediction. METHODS: Standardized indirect calorimetry measurements were made in 202 ventilated, adult critical care patients, and resting metabolic rate was calculated using the following equations: Penn State equation, Faisy, Brandi, Swinamer, Ireton-Jones, Mifflin, Mifflinx1.25, Harris Benedict, Harris Benedictx1.25, Harris Benedict using adjusted weight for obesity, and each of the adjusted weight versions of Harris Benedictx1.25. The subjects were subgrouped by age and obesity status (young nonobese, young obese, elderly nonobese, elderly obese). Performance of each equation was assessed using bias, precision, and accuracy rate statistics. RESULTS: Accuracy rates in the study population ranged from 67% for the Penn State equation to 18% for the weight-adjusted Harris Benedict equation (without multiplication). Within subgroups, the highest accuracy rate was 77% in the elderly nonobese using the Penn State equation and the lowest was 0% for the weight-adjusted Harris Benedict equation. The Penn State equation was the only equation that was unbiased and precise across all subgroups. The obese elderly group was the most difficult to predict. Therefore, a separate regression was computed for this group: Mifflin(0.71)+Tmax(85)+Ve(64)-3085. CONCLUSIONS: The Penn State equation provides the most accurate assessment of metabolic rate in critically ill patients if indirect calorimetry is unavailable. An alternate form of this equation for elderly obese patients is presented, but has yet to be validated.

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Crossref · 10.1177/0148607108322399

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19 of 19 references verified0 citation errors · 0 not checkable

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  • A too low intake, below 50%, may lead to severe calorie debt, empty energy reserves, reduce lean body mass and may increase infectious complications.

    “On the other hand, a too low intake, below 50%, may lead to severe calorie debt and empty the energy reserves, reduce lean body mass and may increase infectious complications (118, 119).”
  • Numerous meta-analyses have demonstrated the poor value of predictive equations, and variability is increased because body weight remains difficult to accurately assess.

    “Numerous metaanalyses have demonstrated the poor value of predictive equations [43,44], variability that is increased because body weight remains difficult to accurately assess [45].”
  • Previous studies have demonstrated the low accuracy of various REE predictive equations based on weight, height, age, gender, etc., for critical illness.

    “Previous studies have demonstrated the low accuracy of various REE predictive equations based on weight, height, age, gender, etc., for critical illness [2, 25].”
  • REE predictive equations are frequently affected by disease characteristics such as respiratory failure, body temperature, severe trauma, burns, especially in obese or low-weight critically ill populations.

    “Firstly, compared with healthy individuals, REE predictive equations are frequently affected by disease characteristics such as respiratory failure, body temperature, severe trauma, burns, especially in obese or low-weight critically ill populations [8, 25].”

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Authors
Frankenfield, D. C., Coleman, A., Alam, S., & Cooney, R. N.
Affiliations
Pennsylvania State University (US)
Corresponding author
Frankenfield, David C.
Venue
Journal of Parenteral and Enteral Nutrition
Publisher
Wiley
Published
2008-10-02
Volume
33
Issue
1
Pages
27-36
ISSN
  • 0148-6071 (ISSN-L)
  • 1941-2444
OpenAlex
W2009303779
Cited by
248
References
19
Citations by year
2026: 5 · 2025: 12 · 2024: 7 · 2023: 13 · 2022: 7 · 2021: 16 · 2020: 18 · 2019: 14 · 2018: 18 · 2017: 12 · 2016: 23 · 2015: 32 · 2014: 14 · 2013: 16 · 2012: 15
FWCI
8.22
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Parenteral and Enteral Nutrition (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Nursing › Nutrition and Dietetics › Clinical Nutrition and Gastroenterology
  • Health Sciences › Medicine › Physiology › Body Composition Measurement Techniques
  • Health Sciences › Medicine › Surgery › Hemodynamic Monitoring and Therapy
Keywords
resting metabolic rate, critically ill patients, indirect calorimetry, nutritional assessment, obesity, elderly patients, mechanically ventilated patients, Harris-Benedict equation, Mifflin equation
MeSH terms
Adult, Aged, Aged, 80 and over, Basal Metabolism, Calorimetry, Indirect, Female, Humans, Male, Mathematics, Middle Aged, Reproducibility of Results, Critical Illness

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