双能 X 射线吸收法内脏脂肪组织评估：预评估饮食的可重复性和影响。
Dual-energy X-ray absorptiometry visceral adipose tissue estimates: reproducibility and impact of pre-assessment diet.
机构信息
Department of Kinesiology and Sport Management, Texas Tech University, Lubbock, TX, USA.
Department of Health, Human Performance, and Recreation, Baylor University, Waco, TX, USA.
出版信息
Eur J Clin Nutr. 2018 Apr;72(4):609-612. doi: 10.1038/s41430-017-0038-1. Epub 2017 Dec 29.
We examined the reproducibility of dual-energy x-ray absorptiometry (DXA) visceral adipose tissue (VAT) estimates as well as the impact of pre-assessment diet. In a counterbalanced design, 41 adults received 6 DXA scans, while consuming standardized high- and low-carbohydrate (LC) diets. The impact of pre-assessment diet was examined via repeated-measures analysis of variance and reproducibility of VAT estimates was evaluated by technical error of measurement (TEM) and s.e. of a single determination (SESD). VAT area, mass and volume were acutely decreased by ~ 6.5% after the LC diet (P ≤ 0.001), but not the high-carbohydrate diet (P > 0.3). Differences persisted after an overnight fast. TEMs for VAT area, mass and volume were < 5 cm, ≤ 0.2 kg and < 25 cm. SESDs for all VAT variables were ≤ 5.5%. In conclusion, DXA VAT estimates exhibit good reproducibility in controlled conditions, but may be impacted by pre-assessment diet.
我们研究了双能 X 射线吸收法（DXA）内脏脂肪组织（VAT）估计的可重复性，以及预评估饮食的影响。在平衡设计中，41 名成年人接受了 6 次 DXA 扫描，同时摄入标准化的高碳水化合物和低碳水化合物（LC）饮食。通过重复测量方差分析来检查预评估饮食的影响，通过测量技术误差（TEM）和单次测定的标准误差（SESD）来评估 VAT 估计的可重复性。在 LC 饮食后，VAT 面积、质量和体积急性下降约 6.5%（P≤0.001），但高碳水化合物饮食无此变化（P＞0.3）。即使在隔夜禁食后，差异仍然存在。VAT 面积、质量和体积的 TEM 值均＜5cm、≤0.2kg 和＜25cm。所有 VAT 变量的 SESD 值均≤5.5%。总之，在受控条件下，DXA VAT 估计具有良好的可重复性，但可能会受到预评估饮食的影响。
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