Metabolic and Molecular Imaging Group, Imaging Sciences Department, MRC Clinical Sciences Centre, Hammersmith Hospital, Imperial College, London, UK.
Eur J Clin Nutr. 2010 May;64(5):525-33. doi: 10.1038/ejcn.2010.18. Epub 2010 Mar 31.
BACKGROUND/OBJECTIVES: Abdominal obesity, more specifically increased intra-abdominal adipose tissue, is strongly associated with increased risk of metabolic disease. Bioelectrical impedance analysis (BIA) has been proposed as a potential method of determining individual abdominal fat compartments in the form of the commercially available ViScan measurement system (Tanita Corporation), but it has yet to be independently validated. The objective of this study was to analyse the validity of the ViScan to assess adult abdominal adiposity across a range of body fatness.
SUBJECTS/METHODS: This was a cross-sectional study with 74 participants (40 females and 34 males with body mass index (BMI) between 18.5 and 39.6 kg/m(2)). Total abdominal adipose tissue, subcutaneous abdominal adipose tissue (SAAT) and intra-abdominal adipose tissue (IAAT) were measured by magnetic resonance imaging (MRI). In addition, intra-hepatocellular lipid was obtained by magnetic resonance spectroscopy. Estimates of abdominal adiposity (total and compartmental) were obtained from BIA and anthropometry.
ViScan-derived percentage trunk fat strongly and significantly related with total abdominal adipose tissue and SAAT in both lean and overweight/obese individuals, and categorized individuals reliably in terms of total abdominal fat. ViScan-derived 'visceral' fat correlated significantly with IAAT but the strength of this relationship was much weaker in overweight/obese individuals, particularly those with higher SAAT, leading to less reliable classification of individuals for IAAT.
The ViScan may serve as a useful tool for predicting total abdominal fat, but prediction of visceral fat (IAAT) may be limited, especially in abdominally obese individuals.
背景/目的：腹部肥胖，特别是内脏脂肪增加，与代谢性疾病风险增加密切相关。生物电阻抗分析（BIA）已被提出作为一种潜在的方法，通过商业上可用的 ViScan 测量系统（Tanita 公司）来确定个体腹部脂肪区室，但其尚未得到独立验证。本研究的目的是分析 ViScan 评估不同体脂水平成人腹部肥胖的有效性。
受试者/方法：这是一项横断面研究，共纳入 74 名参与者（40 名女性和 34 名男性，BMI 为 18.5 至 39.6 kg/m²）。使用磁共振成像（MRI）测量总腹部脂肪、腹部皮下脂肪（SAAT）和腹部内脏脂肪（IAAT）。此外，通过磁共振波谱测量肝内细胞内脂肪。通过 BIA 和人体测量学获得腹部脂肪（总体和区室）的估计值。
ViScan 衍生的躯干脂肪百分比与瘦体重和超重/肥胖个体的总腹部脂肪和 SAAT 强烈且显著相关，并能可靠地对总腹部脂肪进行分类。ViScan 衍生的“内脏”脂肪与 IAAT 显著相关，但在超重/肥胖个体中，这种相关性较弱，特别是在 SAAT 较高的个体中，导致对 IAAT 的个体分类不可靠。
ViScan 可能是预测总腹部脂肪的有用工具，但预测内脏脂肪（IAAT）可能有限，尤其是在腹部肥胖的个体中。
