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Trunk body volume as a proportion of total body volume in severely and very severely obese individuals (body mass index ≥ 35 kg/m 2 )
Author(s) -
Wang Jack,
Gallagher Dympna,
Thornton John,
YU Wen,
Weil Rich,
Kovac Betty,
PISunyer F Xavier
Publication year - 2006
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.20.4.a166
Subject(s) - body mass index , trunk , medicine , obesity , body weight , anthropometry , body height , demography , cardiology , zoology , endocrinology , biology , ecology , sociology
There is growing evidence that individuals with elevated truncal or abdominal size have a higher incidence of metabolic disorders. However, the relationship between truncal body size and total body size in severely obese (body mass index (BMI) ≥ 35 but < 40 kg/m 2 ) and very severely obese individuals (BMI ≥ 40 kg/m 2 ) has not been studied due to the lack of available measurement techniques for these populations. We measured the volumes of total body (TBV), trunk (TV), arms (AV) and legs (LV) in 27 individuals with BMI 36–63 kg/m 2 (19 females, age 19–65 yrs, weight 95–182 kg) using a newly validated 3‐D photonic image scanner (model C9036‐02, Hamamatsu Co. Japan, Wang et al. Obes Res. 2005; 13 :), and calculated TV/TBW, AV/TBV, and LV/TBV for each region as a proportion of TBV. TV/TBV increased and AV/TBV and LV/TBV decreased significantly with increasing BMI. The linear equations below demonstrate these relationships:T V / T B V = 0.0052 B M I + 0.4555 , R 2 = 0.49 , p < 0.001A V / T B V = − 0.0006 B M I + 0.0684 , R 2 = 0.31 , p = 0.003L V / T B V = − 0.0041 B M I + 0.4039 , R 2 = 0.39 , p < 0.001These results indicate that the increased body weight in individuals with a BMI ≥ 35 kg/m 2 is mainly in the trunk region, and the rate of increase in trunk volume per unit of BMI is approximately two‐fold greater than that in individuals with a BMI < 35 kg/m 2 (Yu et al, 2006FASEB). The implication of these findings is that any increase in weight in individuals with a BMI ≥ 35 kg/m 2 could have higher health risks than the health risks due to an increase in weight in individuals with a BMI < 35 kg/m 2 . Supported by DK26687‐24 and PO!‐DK‐42618.