Validity of the dietary reference intakes for determining energy requirements in older adults

Didace Ndahimana, Na Young Go, Kazuko Ishikawa-Takata, Jonghoon Park, Eun Kyung Kim

Research output: Contribution to journalArticle

Abstract

BACKGROUND/OBJECTIVES: The objectives of this study were to evaluate the accuracy of the Dietary Reference Intakes (DRI) for estimating the energy requirements of older adults, and to develop and validate new equations for predicting the energy requirements of this population group. MATERIALS/METHODS: The study subjects were 25 men and 23 women with a mean age of 72.2 ± 3.9 years and 70.0 ± 3.3 years, and mean BMI of 24.0 ± 2.1 and 23.9 ± 2.7, respectively. The total energy expenditure (TEE) was measured by using the doubly labeled water (DLW) method, and used to validate the DRI predictive equations for estimated energy requirements (EER) and to develop new EER predictive equations. These developed equations were cross-validated by using the leave-one-out technique. RESULTS: In men, the DRI equation had a-7.2% bias and accurately predicted the EER (meaning EER values within ±10% of the measured TEE) for 64% of the subjects, whereas our developed equation had a bias of-0.1% and an accuracy rate of 84%. In women, the bias was-6.6% for the DRI equation and 0.2% for our developed equation, and the accuracy rate was 74% and 83%, respectively. The predicted EER was strongly correlated with the measured TEE, for both the DRI equations and our developed equations (Pearson’s r = 0.915 and 0.908, respectively). CONCLUSIONS: The DRI equations provided an acceptable prediction of EER in older adults and these study results therefore support the use of these equations in this population group. Our developed equations had a better predictive accuracy than the DRI equations, but more studies need to be performed to assess the performance of these new equations when applied to an independent sample of older adults.

Original languageEnglish
Pages (from-to)256-262
Number of pages7
JournalNutrition Research and Practice
Volume13
Issue number3
DOIs
Publication statusPublished - 2019 Jan 1

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Dietary Reference Intakes
Recommended Dietary Allowances
energy requirements
Energy Metabolism
Population Groups
energy expenditure
Water

Keywords

  • Elderly
  • Energy metabolism
  • Nutritional requirements

ASJC Scopus subject areas

  • Food Science
  • Nutrition and Dietetics

Cite this

Validity of the dietary reference intakes for determining energy requirements in older adults. / Ndahimana, Didace; Go, Na Young; Ishikawa-Takata, Kazuko; Park, Jonghoon; Kim, Eun Kyung.

In: Nutrition Research and Practice, Vol. 13, No. 3, 01.01.2019, p. 256-262.

Research output: Contribution to journalArticle

Ndahimana, Didace ; Go, Na Young ; Ishikawa-Takata, Kazuko ; Park, Jonghoon ; Kim, Eun Kyung. / Validity of the dietary reference intakes for determining energy requirements in older adults. In: Nutrition Research and Practice. 2019 ; Vol. 13, No. 3. pp. 256-262.
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abstract = "BACKGROUND/OBJECTIVES: The objectives of this study were to evaluate the accuracy of the Dietary Reference Intakes (DRI) for estimating the energy requirements of older adults, and to develop and validate new equations for predicting the energy requirements of this population group. MATERIALS/METHODS: The study subjects were 25 men and 23 women with a mean age of 72.2 ± 3.9 years and 70.0 ± 3.3 years, and mean BMI of 24.0 ± 2.1 and 23.9 ± 2.7, respectively. The total energy expenditure (TEE) was measured by using the doubly labeled water (DLW) method, and used to validate the DRI predictive equations for estimated energy requirements (EER) and to develop new EER predictive equations. These developed equations were cross-validated by using the leave-one-out technique. RESULTS: In men, the DRI equation had a-7.2{\%} bias and accurately predicted the EER (meaning EER values within ±10{\%} of the measured TEE) for 64{\%} of the subjects, whereas our developed equation had a bias of-0.1{\%} and an accuracy rate of 84{\%}. In women, the bias was-6.6{\%} for the DRI equation and 0.2{\%} for our developed equation, and the accuracy rate was 74{\%} and 83{\%}, respectively. The predicted EER was strongly correlated with the measured TEE, for both the DRI equations and our developed equations (Pearson’s r = 0.915 and 0.908, respectively). CONCLUSIONS: The DRI equations provided an acceptable prediction of EER in older adults and these study results therefore support the use of these equations in this population group. Our developed equations had a better predictive accuracy than the DRI equations, but more studies need to be performed to assess the performance of these new equations when applied to an independent sample of older adults.",
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