A Prospective Comparative Study to Assess the Accuracy of Energy Expenditures Calculated by Bioimpedance Analysis and Indirect Calorimetry

BIA demonstrated clinically acceptable agreement with IC for estimating REE in obese Indian adults. Using a predefined equivalence margin of ±10% (≈±160 kcal/day) of IC values, both the mean bias and Bland-Altman limits of agreement fell within this range, supporting statistical and clinical comparability between the two methods. Given its accessibility, portability, and cost-effectiveness, BIA may serve as a practical alternative to IC in clinical and research settings, although further validation across larger and more diverse populations is warranted.