Nutrición Hospitalaria 01295 / http://dx.doi.org/10.20960/nh.1295
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Trabajo Original

Dual energy x-ray absorptiometry (dxa) reliability and intraobserver reproducibility for segmental body composition measuring


Osvaldo Costa Moreira, Claudia Eliza Patrocinio De Oliveira, José Antonio De Paz

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Background: the measurement precision of body composition can interfere on the diagnosis and prescription of diseases’ treatment. Furthermore, with regard to dual energy X-rays absorptiometry (DXA), there may be important differences between the measures of regions of interest (ROI) automatically performed by DXA or manually by an evaluator, which can cause measurement error and influence the evaluation or diagnosis.Aim: thus, this study aimed to evaluate the measurement reliability of body composition by DXA and intraobserver reproducibility for the ROI measurement. Methods: a total of 15 young adults were subjected to two full-body scans by DXA, under the same conditions. The first scan of all volunteers was chosen and the extent of the ROI was performed, in two stages, separated by a period of 2 weeks, by a single trained evaluator. The coefficient of variation (CV) and intraclass correlation coefficient (ICC) were calculated with a significance level of p < 0.05. Results: high-precision measurements of DXA for whole body mass (ICC = 0.999; CV = 2.3%), fat mass (ICC = 0.998; CV = 1.6%), lean mass (ICC = 0.995; CV = 0.3%) and bone mineral content (ICC = 0.996; CV < 0.1%) were obtained. Further, it was observed high intraobserver reproducibility for ROI measurement, with ICC values ranging between 0.952 and 0.999.Conclusion:body composition measurement by DXA presents high reproducibility for whole body mass, fat mass, lean mass and bone mineral content and also high intraobserver reproducibility for the ROI measurement.

Palabras Clave: Densitometry, reliability of results, reproducibility of results, body composition, bone mineral density



COSTA MOREIRA, Osvaldo, PATROCÍNIO DE OLIVEIRA, Cláudia E., DE MATOS, Dihogo G., MAZINI FILHO, Mauro L., FERNANDES DA SILVA, Sandro, AIDAR, Felipe J., DE PAZ, José A. (2021) The comparative measurement of body segment parameters using dual energy X-ray absorptiometry between sexes. The Journal of Sports Medicine and Physical Fitness
Umehara, Takuya, Kaneguchi, Akinori, Watanabe, Keita, Katayama, Nobuhisa, Kuwahara, Daisuke, Kaneyashiki, Ryo, Kito, Nobuhiro, Kakehashi, Masayuki (2022) Movement control during one-leg standing is important for the bone mineral density maintenance or improvement. Journal of Bone and Mineral Metabolism
Chiles Shaffer, Nancy, Simonsick, Eleanor M, Thorpe, Roland J, Studenski, Stephanie A, Newman, Anne (2020) The Roles of Body Composition and Specific Strength in the Relationship Between Race and Physical Performance in Older Adults. The Journals of Gerontology: Series A
Agostinete, Ricardo Ribeiro, Vlachopoulos, Dimitris, Werneck, André Oliveira, Maillane-Vanegas, Santiago, Lynch, Kyle Robinson, Naughton, Geraldine, Fernandes, Romulo Araújo (2020) Bone accrual over 18 months of participation in different loading sports during adolescence. Archives of Osteoporosis
Locquet, Médéa, Beaudart, Charlotte, Reginster, Jean-Yves, Bruyère, Olivier (2019) Association Between the Decline in Muscle Health and the Decline in Bone Health in Older Individuals from the SarcoPhAge Cohort. Calcified Tissue International

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