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Concordancia entre gasto energético y reposo medido y estimado por fórmulas predictivas en mujeres con obesidad severa y mórbida

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2007
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Carrasco, F.
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Concordancia entre gasto energético y reposo medido y estimado por fórmulas predictivas en mujeres con obesidad severa y mórbida
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Author
  • Carrasco, F.;
  • Rojas, P.;
  • Ruz, Manuel;
  • Rebolledo Acevedo, Annabella;
  • Mizón, Claudio;
  • Codoceo, Juana;
  • Inostroza Escobar, Jorge;
  • Papapietro Vallejo, Karin;
  • Csendes Juhasz, Attila;
Abstract
Objective: To compare measured resting energy expenditure (REE) with that predicted by formulas derived from populations with normal weight or obesity and from women with severe and morbid obesity. Material and methods: 66 women (aged 35.6 +/- 10.3 y and BMI of 44.7 +/- 4.9 kg/m(2)) were evaluated by indirect calorimetry with a metabolic monitor Deltatrac (Datex Inst., Finland), before undergoing gastric bypass. REE was calculated with the following equations: Harris-Benedict's with both actual and adjusted weight, Ireton-Jones', Mifflin's, and Carrasco's Fast Estimation, which corresponds to 16.2 kcal x kg actual weight. Results: (mean +/- sd). Measured REE was 1797 +/- 239 kcal/day. All formulas, except Harris-Benedict's with adjusted weight, overestimated REE. The Ireton-Jones' equation presented the greater overestimation (689 329 kcal/day), whereas Mifflin's equation overestimated REE only by 6 202 kcal/day. No significant differences were detected between measured and calculated REE by Mifflin's and Carrasco's Fast Estimation. Accuracy (defined as difference between calculated and measured REE within +/- 10%) was greater with Mifflin's equation (68%), followed by Harris-Benedict's with actual weight (64%) and Carrasco's Fast Estimation (61%). By using the Bland-Altman analysis, significant correlations were observed between calculated-measured REE and mean REE (calculated + measured/2) with all equations except Carrasco's Fast Estimation. This means that all but one formula underestimate or overestimate REE depending on the level of measured REE. Conclusion: In severe and morbid obese women, Mifflin's and Carrasco's Fast Estimation equations provided the best performance to estimate REE. Before recommending an equation in an a subset of individuals it is necessary to make previous validation studies mine that equation with the best predictive power for this particular group of patients.
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URI: https://repositorio.uchile.cl/handle/2250/127505
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NUTRICION HOSPITALARIA Vol. 22 JUL-AUG 2007 4 410-416
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