2021 Volume 3 Issue 4 Pages 210-217
Aim: To evaluate prediction formulae for determining energy requirements in critically ill underweight patients.
Subjects and Methods: Patients aged 18 years or older with BMI < 22 kg/m2 who underwent indirect calorimetry in the intensive care unit of Yokohama Rosai Hospital were enrolled. Energy expenditure measured by indirect calorimetry (EE-IC) was compared with the predicted energy requirement calculated using a simple formula (weight × 25 kcal / day) and the total energy requirement calculated using the Harris-Benedict formula (TER-HB).
Results: Results of 21 patients (median BMI: 19.2 kg/m2) were obtained. The Pearson product-moment correlation coefficient between EE-IC and the predicted value calculated using the simple formula was 0.78 (95% confidence interval: 0.53 to 0.91) and that between EE-IC and TER-HB was 0.53 (95% confidence interval: 0.13 to 0.78). Mean differences and 95% limits of agreement by Bland-Altman analysis were smaller for the predicted value calculated using the simple formula than for TER-HB.
Conclusion: The simple formula could be useful for predicting energy requirements in critically ill underweight patients.
