Highlights
- •Malnutrition has a significant negative effect on outcome in patients with cirrhosis.
- •Accurate information on daily energy requirements is essential for effective nutritional management.
- •Prediction equations provide estimates of daily energy expenditure, but these vary significantly by ethnicity.
- •Where available, resting energy expenditure should be measured using indirect calorimetry.
Background & Aims
Malnutrition is associated with adverse clinical outcomes in patients with cirrhosis.
Accurate assessment of energy requirements is needed to optimize dietary intake. Resting
energy expenditure (REE), the major component of total energy expenditure, can be
measured using indirect calorimetry (mREE) or estimated using prediction equations
(pREE). This study assessed the usefulness of predicted estimates of REE in this patient
population.
Methods
Individual mREE data were available for 900 patients with cirrhosis (mean [±1 SD]
age 55.7±11.6 years-old; 70% men; 52% south-east Asian) and 282 healthy controls (mean
age 36.0±12.8 years-old; 52% men; 18% south-east Asian). Metabolic status was classified
using thresholds based on the mean ± 1 SD of the mREE in the healthy controls. Comparisons
were made between mREE and pREE estimates obtained using the Harris-Benedict, Mifflin,
Schofield and Henry equations. Stepwise regression was used to build 3 new prediction
models which included sex, ethnicity, body composition measures, and model for end-stage
liver disease scores.
Results
The mean mREE was significantly higher in patients than controls when referenced to
dry body weight (22.4±3.8 cf. 20.8±2.6 kcal/kg/24 hr; p <0.001); there were no significant sex differences. The mean mREE was significantly
higher in Caucasian than Asian patients (23.1±4.4 cf. 21.7±2.9 kcal/kg/24 hr; p <0.001). Overall, 37.1% of Caucasian and 25.3% of Asian patients were classified as
hypermetabolic. The differences between mREE and pREE were both statistically and
clinically relevant; in the total patient population, pREE estimates ranged from 501
kcal/24 hr less to 548 kcal/24 hr more than the mREE. Newly derived prediction equations
provided better estimates of mREE but still had limited clinical utility.
Conclusions
Prediction equations do not provide useful estimates of REE in patients with cirrhosis.
REE should be directly measured.
Lay summary
People with cirrhosis are often malnourished and this has a detrimental effect on
outcome. Provision of an adequate diet is very important and is best achieved by measuring
daily energy requirements and adjusting dietary intake accordingly. Prediction equations,
which use information on age, sex, weight, and height can be used to estimate energy
requirements; however, the results they provide are not accurate enough for clinical
use, particularly as they vary according to sex and ethnicity.
Graphical abstract

Graphical Abstract
Keywords
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Article info
Publication history
Published online: January 25, 2022
Accepted:
January 13,
2022
Received in revised form:
January 11,
2022
Received:
September 11,
2021
Footnotes
Author names in bold designate shared co-first authorship
Identification
Copyright
© 2022 European Association for the Study of the Liver. Published by Elsevier B.V. All rights reserved.