Body fat measurement among Singaporean Chinese, Malays and Indians: a comparative study using a four-compartment model and different two-compartment models
Body fat measurement among Singaporean Chinese, Malays and Indians: a comparative study using a four-compartment model and different two-compartment models
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DOI：
10.1079/bjn2000276
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发表时间：
2001-04-01
影响因子：
3.6
通讯作者：
Deurenberg, P
中科院分区：
文献类型：
--
作者：
Deurenberg-Yap, M;Schmidt, G;Deurenberg, P
这项横断面研究比较了从四室（4C）模型获得的体脂百分比（BF %）和从液体比重法获得的BF %（使用（H2O）-H-2）、双能X线吸收测定法（DXA）和密度测定法在三个主要种族群体中进行（华人、马来人和印度人）在新加坡，并确定了两室（2C）模型作为替代方法评估不同种族人群BF %的适用性。共选择了291例受试者（108例中国人、76例马来人、107例印度人），以确保充分代表一般成人人群的年龄范围（18 - 75岁）和BMI范围（16 - 40 kg/m2），每个性别组的受试者人数几乎相等。测量体重、身高、通过（H2O）-H-2稀释法测量的总身体水分、Bodpod（R）密度测定法和Hologic（R）QDR-4500骨矿物质含量。采用4C模型，亚组的BF %测量值为：中国女性33.5（SD 7.5）、中国男性24.4（SD 6.1）、马来女性37.8（SD 6.3）、马来男性26.0（SD 7.6）、印度女性38.2（SD 7.0）、印度男性28.1（SD 5.5）。发现4C和2C模型（液体比重法、DXA和密度测定法）测量的BF %之间存在差异，DXA低估了所有种族性别组的BF %（2.1 - 4.2 BF %），密度测定法低估了BF %（0.5 - 3.2 BF %）。在组水平上，4C模型和（H2O）-H-2之间的BF %差异最低（不同组中为0.0 - 1.4 BF %），而4C模型和DXA之间的差异最高。4C模型与（H2O）-H-2和4C模型与DXA之间的差异与4C模型、去脂质量（FFM）的水分数（f（水））和矿物质分数呈正相关（f（矿物质））与FFM密度（D-FFM）呈负相关，而4C模型和密度测量法的差异分别与这些变量呈负相关和正相关（即相关性相反）。观察到的差异的最大贡献者是f（水）和D-FFM。当对照参考4C模型进行验证时，发现2C模型不适合在个体水平上准确测量BF %，这是由于高误差和违反种族群体中FFM和D-FFM恒定水合的假设。在一组水平上，最好的2C模型测量BF %之间的新加坡人被发现是（H2O）-H-2。
This cross-sectional study compared body fat percentage (BF%) obtained from a four-compartment (4C) model with BF% from hydrometry (using (H2O)-H-2), dual-energy X-ray absorptiometry (DXA) and densitometry among the three main ethnic groups (Chinese, Malays and Indians) in Singapore, and determined the suitability of two-compartment (2C) models as surrogate methods for assessing BF% among different ethnic groups. A total of 291 subjects (108 Chinese, seventy-six Malays, 107 Indians) were selected to ensure an adequate representation of age range (18-75 years) and BMI range (16-40 kg/m(2)) of the general adult population, with almost equal numbers from each gender group. Body weight was measured, together with body height, total body water by (H2O)-H-2 dilution, densitometry with Bodpod(R) and bone mineral content with Hologic(R) QDR-4500. BF% measurements with a 4C model for the subgroups were: Chinese females 33.5 (SD 7.5), Chinese males 24.4 (SD 6.1), Malay females 37.8 (SD 6.3), Malay males 26.0 (SD 7.6), Indian females 38.2 (SD 7.0), Indian males 28.1 (SD 5.5). Differences between BF% measured by the 4C and 2C models (hydrometry, DXA and densitometry) were found, with underestimation of BF% in all the ethnic-gender groups by DXA of 2.1-4.2 BF% and by densitometry of 0.5-3.2 BF%). On a group level, the differences in BF% between the 4C model and (H2O)-H-2 were the lowest (0.0-1.4 BF% in the different groups), while differences between the 4C model and DXA were the highest. Differences between the 4C model and (H2O)-H-2 and between the 4C model and DXA were positively correlated with the 4C model, water fraction (f(water)) of fat-free mass (FFM) and the mineral fraction (f(mineral)) of FFM, and negatively correlated with density of the FFM (D-FFM), while the difference between 4C model and densitometry correlated with these variables negatively and positively respectively (i.e. the correlations were opposite). The largest contributors to the observed differences were f(water) and D-FFM. When validated against the reference 4C model, 2C models were found to be unsuitable for accurate measurements of BF% at the individual level, owing to the high errors and violation of assumptions of constant hydration of FFM and D-FFM among the ethnic groups. On a group level, the best 2C model for measuring BF% among Singaporeans was found to be (H2O)-H-2.