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Estimating resting energy expenditure from dual‐energy X‐ray absorptiometry: A cross‐sectional study in healthy young adults
Author(s) -
Venturini Ana Cláudia Rossini,
Silva Analiza Mónica,
Abdalla Pedro Pugliesi,
Santos André Pereira,
Borges Franciane Goes,
Alves Thiago Cândido,
Siqueira Vitor Antonio Assis Alves,
Cruz Alves Natália Maíra,
Ferriolli Eduardo,
Coelho Eduardo Barbosa,
Duncan Michael,
Mota Jorge,
Machado Dalmo Roberto Lopes
Publication year - 2020
Publication title -
american journal of human biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.559
H-Index - 81
eISSN - 1520-6300
pISSN - 1042-0533
DOI - 10.1002/ajhb.23466
Subject(s) - anthropometry , dual energy x ray absorptiometry , resting energy expenditure , medicine , limits of agreement , dual energy , fat free mass , nuclear medicine , lean tissue , energy expenditure , demography , fat mass , zoology , adipose tissue , body weight , biology , bone mineral , osteoporosis , sociology
Objective To qualify a 3C approach model of dual‐energy X‐ray absorptiometry (DXA) to estimate multicomponent resting energy expenditure (REE) referenced by indirect calorimetry (IC). Methods A sample of 155 college students, of both sexes (18‐30 years old) was evaluated. Anthropometric measures, REE by IC, and whole‐body DXA‐scans were performed. The REE for each body component was determined after transforming the components from the molecular (DXA) to the organ tissue level. Bland‐Altman and proportional bias analyses were used to verify agreement between REE measured (REE IC ) and estimated (REE DXA ). Results Statistically significant differences were found for all sex comparisons ( P < .001), except for age ( P = .950). Differences from the final sex‐specific models' were not found between REE IC and REE DXA ( P > .05). Men also presented greater expenditure ( P < .001) in each component, except for adipose tissue. The plots confirmed the validity of the model for both sexes, with low difference values between the measured and estimated REE. The mean of the differences of REE IC and REE DXA showed heteroscedasticity of the data for men ( P = .004). The same error tendency was not evident for women ( P = .333). Conclusions This 3C model, estimating REE from a multicomponent approach, allows a new application of DXA as tool for understanding intraindividual differences in terms of the mass of metabolically active tissue. Sex and populational differences should be taken in account. Consequently, we present qualified sex‐specific DXA models that can be applied in different contexts such as health and sports, besides considering interpersonal differences in terms of energy expenditure.