ORTON Orthopaedic Hospital, ORTON Foundation, Jyväskylä, Finland.
Obes Facts. 2013;6(2):203-10. doi: 10.1159/000348238. Epub 2013 Apr 24.
The aim of this study was to develop and test the validity of a new repeatable method to delimit abdominal areas for follow-up of fat mass (FM) and lean tissue mass (LM) in DEXA examinations.
37 male volunteers underwent two DEXA examinations. Total body FM and LM measurements and corresponding abdominal measurements in a carefully defined region were calculated from the first scan. After repositioning of the subjects and a second scan, the delimited region was copied and the abdominal tissues re-calculated.
The mean LM of the abdominal area was 2.804 kg (SD 0.556), and the mean FM was 1.026 kg (SD 0.537). The intra-class correlation coefficient for the repeated abdominal LM, FM, and LM/FM ratio measurements was 0.99. The mean difference (bias) for the repeated abdominal LM measurements was -13 g (95% confidence interval (CI) -193.0 to 166.8), and for the repeated abdominal FM measurements it was -35 g (95% CI -178.9 to 108.5).
The results indicate that regional DEXA is a sensitive method with excellent reproducibility in the measurements of the abdominal fat and lean tissues. The method may serve as a useful tool for evaluation and follow-up of various dietary and training programmes.
本研究旨在开发和验证一种新的可重复方法，以划定 DEXA 检查中脂肪量 (FM) 和瘦体量 (LM) 的腹部区域。
37 名男性志愿者接受了两次 DEXA 检查。从第一次扫描中计算出全身 FM 和 LM 测量值以及在精心定义的区域中的相应腹部测量值。在重新定位受试者并进行第二次扫描后，复制划定的区域并重新计算腹部组织。
腹部区域的平均 LM 为 2.804 公斤（SD 0.556），平均 FM 为 1.026 公斤（SD 0.537）。重复腹部 LM、FM 和 LM/FM 比值测量的组内相关系数为 0.99。重复腹部 LM 测量的平均差异（偏差）为-13 克（95%置信区间 (CI) -193.0 至 166.8），重复腹部 FM 测量的平均差异为-35 克（95% CI -178.9 至 108.5）。
结果表明，区域 DEXA 是一种敏感的方法，在腹部脂肪和瘦组织的测量中具有出色的可重复性。该方法可以作为评估和随访各种饮食和训练计划的有用工具。
