Dual-Energy X-Ray Absorptiometry and Anthropometry

DXA and anthropometric measures were collected using an adaptation of the protocol described by Ng et al. (26 (link)). In the current study, each participant underwent 2 whole-body DXA scans with repositioning on either a Hologic Horizon/A system at UCSF or a Hologic Discovery/A system at PBRC and at UHCC (Hologic Inc.). Results of the 2 whole-body DXA scans were averaged. Participants were scanned according to the manufacturer's guidelines. All DXA scans were centrally analyzed at UHCC by a single certified technologist using Hologic Apex 5.5 software. Output from DXA included regional and whole-body percentage fat mass, lean soft tissue mass, and mean VAT and SAT for L1–L5. DXA cross-calibration phantoms were circulated between all sites, and calibration equations were derived to remove systematic bias in all bone and soft tissue results.

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Panizza C.E., Wong M.C., Kelly N., Liu Y.E., Shvetsov Y.B., Lowe D.A., Weiss E.J., Heymsfield S.B., Kennedy S., Boushey C.J., Maskarinec G, & Shepherd J.A. (2020). Diet Quality and Visceral Adiposity among a Multiethnic Population of Young, Middle, and Older Aged Adults. Current Developments in Nutrition, 4(6), nzaa090.

Publication 2020

Hologic Horizon/A system Hologic Discovery/A system

Adaptation Body fat Bone Tissue Whole body scans

Corresponding Organization : University of Hawaii System

Other organizations : University of California, San Francisco, Pennington Biomedical Research Center

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Variable analysis

independent variables

None explicitly mentioned

dependent variables

Regional and whole-body percentage fat mass
Lean soft tissue mass
Mean VAT and SAT for L1–L5

control variables

DXA scan protocol and guidelines set by the manufacturer
Centralized DXA scan analysis by a single certified technologist using Hologic Apex 5.5 software
DXA cross-calibration phantoms circulated between all sites to remove systematic bias in all bone and soft tissue results

controls

Positive control: DXA cross-calibration phantoms
Negative control: Not mentioned

Annotations

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