Body composition assessment by dual-energy X-ray absorptiometry: Comparison of prone and supine measurements

Reproducibility of dual-energy x-ray absorptiometry total and regional body composition measurements using different scanning positions and definitions of regions

“…Lambrinoudaki et al [13] compared changes in the mean values of body composition in supine and prone positions and found differences in the observed measurement values. Furthermore, in our study, there was more variation between repeated values in supine-prone than in supine-supine measurements.…”

“…Theoretically, however, composition of the body should be the same regardless of the position of the subject. To our knowledge, the reliability of consecutive DEXA total body measurements in different body positions has previously been reported in only 1 publication [13]. Single DEXA measurements of regional body composition have been performed in elite athletes [14]; and consecutive follow-up measurements, in obesity-related research [15,16] as well as after fasting [17].…”

“…According to the DEXA equipment manufacturers, the software programs for modern scanners are capable of separating one body region from the rest of the body during the measurement. Few authors have however investigated the reliability of such regional assessments of body part composition [1,10,13].…”

Evidence of metabolic syndrome in lean children with premature pubarche at diagnosis

“…In this study, we used supine DEXA to assess body composition [43]. Along with underwater weighing and isotope dilution, DEXA is considered the most accurate method for measurement of body composition [44].…”

Methodology Review: Using Dual-Energy X-Ray Absorptiometry (DXA) for the Assessment of Body Composition in Athletes and Active People

“…For example, in terms of subject presentation, only a third of studies required subjects to be in a fasted state, a further third allowed subjects to eat lightly or drink fluids before the scan, and the remaining studies did not provide details of this aspect of their DXA assessment protocol, despite literature documenting acute food and fluid intake impacting reliability of measurement (Going et al, 1993;Horber et al, 1992;Thomsen et al, 1998;Vilaca et al, 2009). About 70% of reviewed studies failed to report any detail on subject positioning on the scanning bed and while most studies provided details of the type and model of DXA scanner used, ~30% failed to report the software version used during analysis, despite the fact that these factors are known to influence reliability of measurement (Kistorp & Svendsen, 1998;Lambrinoudaki et al, 1998;M. Lohman et al, 2009;Van Loan et al, 1995).…”