Accuracy of the Resting Energy Expenditure Estimation Equations for Healthy Women.
BACKGROUND
There exist several prediction equations for the estimation of resting energy expenditure (REE). However, none of these equations have been validated in the Chilean female population yet. The aims of this study are (1) to determine the accuracy of existing equations for prediction of REE and (2) to develop new equations in a sample of healthy Chilean women.


METHODS
A cross-sectional descriptive study was carried out on 620 Chilean women. The sample showed an age range between 18 and 73 years, a body mass index average of 28.5 ± 5.2 kg/m2, and a prevalence of overweight and obesity of 41% and 33.2%, respectively. REE was measured by indirect calorimetry (REEIC), which was used as the gold standard to determine the accuracy of twelve available REE prediction equations and to calculate alternative formulas for estimation of REE. Paired t-tests and Bland-Altman plots were used to know the accuracy of the estimation equations with REEIC. At the same time, multiple linear regressions were performed to propose possible alternative equations. The analyses were carried out by age groups and according to nutritional status.


RESULTS
All the equations showed a tendency to overestimate REE, regardless of age or nutritional status. Overall, the Ireton-Jones equation achieved the highest mean percentage difference from REEIC at 67.1 ± 31%. The alternative new equations, containing variables of body composition, reached a higher percentage of classification within ± 10% of REEIC.


CONCLUSIONS
The available equations do not adequately estimate REE in this sample of Chilean women. Although they must be validated, the new formulas proposed show better adaptation to this Chilean sample.
['Molina-Luque|Rafael|R|0000-0002-5223-7400', 'Carrasco-Marín|Fernanda|F|', 'Márquez-Urrizola|Constanza|C|', 'Ulloa|Natalia|N|0000-0002-0437-5016', 'Romero-Saldaña|Manuel|M|', 'Molina-Recio|Guillermo|G|0000-0002-0005-4901']
D000293:Adolescent D000328:Adult D000368:Aged D001481:Basal Metabolism D015992:Body Mass Index D002153:Calorimetry, Indirect D003430:Cross-Sectional Studies D004734:Energy Metabolism D005260:Female D006801:Humans D055641:Mathematical Concepts D008875:Middle Aged D009752:Nutritional Status D009765:Obesity D050177:Overweight D015203:Reproducibility of Results D012146:Rest D055815:Young Adult
resting energy expenditure women anthropometry