Race-related differences in tissue dielectric constant measured noninvasively at 300ￂ MHz in male and female skin at multiple sites and depths

Background/Purpose We hypothesized that reported race-related differences in skin properties cause skin and skin-to-fat water differences among races that are measureable by skin tissue dielectric constant (TDC) values that depend strongly on water content. Our first aim was to test this hypothesis....

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Bibliographic Details
Published in:Skin research and technology 2017-11, Vol.23 (4), p.471
Main Authors: Mayrovitz, H N, Mahtani, S A, Pitts, E, Michaelos, L
Format: Article
Language:English
Subjects:
Adults
Ankle
Body composition
Body water
Chest
Dielectric constant
Dielectric strength
Edema
Females
Forearm
Lymphedema
Males
Moisture content
Permittivity
Racial differences
Skin
Water content
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Summary:Background/Purpose We hypothesized that reported race-related differences in skin properties cause skin and skin-to-fat water differences among races that are measureable by skin tissue dielectric constant (TDC) values that depend strongly on water content. Our first aim was to test this hypothesis. Also, since inter-side TDC ratios are used to assess edema and lymphedema, the second aim was to test if TDC ratios are race-dependent. The third aim was to determine the extent to which TDC depends on total body water (TBW) and fat (TBF). Methods Tissue dielectric constant was measured to 1.5 or 5.0 mm depths bilaterally on chest, forearm and ankle in 100 young (19-39 years) adults with 10 male and 10 female per self-expressed race. Races were African-American, Asian, Asian-Indian, Caucasian and Hispanic groups. TBW and TBF were measured using bioimpedance. Results Tissue dielectric constant values decreased from chest to forearm to ankle (P
ISSN:0909-752X
1600-0846
DOI:10.1111/srt.12358