Objective To analyze the consistency and correlation between the resting energy expenditures derived from indirect calorimetry (IC) , Harris-Benedict and Mifflin equations and body composition prediction in (REE) vegetarians, to guide the development of targeted energy nutrition programs. Methods A total of 138 cases were recruited from November to December, 2023. REE was measured by indirect calorimetry (MREE) Harris-benedict and Mifflin equations and body composition were used to calculate the predicted resting energy expenditure (PREE). The consistency between MREE and PREE was analyzed by Bland-Altman method and the correlation between MREE and PREE was analyzed by Spearman method. Results Of the 138 vegetarians, 100 were females and 38 were males. The MREE of the males (1711.32±250.51) kcal was significantly higher than that of the females (1333.56±163.08) kcal (P=0.000). Spearman bivariate correlation analysis showed that the predicted values by the three methods were positively correlated with the measured values (P<0.05), and the values estimated from human body composition (R=0.76) had the strongest correlation. The results of Bland-Altman analysis showed that the 95% consistent limits of the three methods were (–360.76,254.68) kcal/d, (–437.72,188.18) kcal/d, (–416.00,177.84) kcal/d, which were beyond the acceptable range of –140.60-140.60 kcal/d. Conclusion There was a significant positive correlation between the MREE and the PREE in vegetarians, and the PREE was lower than the MREE.
Key words
resting energy expenditure /
indirect calorimetry /
vegetarian
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