评估近红外相互作用用于皮下脂肪和全身脂肪的评估

Evaluation of near infra-red interactance for assessment of subcutaneous and total body fat.

作者信息

Brooke-Wavell K, Jones P R, Norgan N G, Hardman A E

机构信息

Department of Human Sciences, Loughborough University of Technology, Leicestershire, UK.

出版信息

Eur J Clin Nutr. 1995 Jan;49(1):57-65.

PMID:7713052

Abstract

OBJECTIVE

Near infra-red interactance (NIRI) has been used for assessment of total body fatness, but its relationship with composition at the measurement site is not clear. This study examines the relationship of interactance with subcutaneous adipose tissue and muscle thickness as well as total body fat content.

DESIGN

(i) Validation of NIRI by comparison with subcutaneous tissue thicknesses from ultrasound. (ii) Cross-validation of techniques for estimation of body fat content.

SETTING

Laboratory.

SUBJECTS

(i) 54 young adults (27 male and 27 female) and (ii) 63 middle-aged men.

INTERVENTIONS

Measurements of subcutaneous adipose tissue thickness and muscle thickness using ultrasound, near infra-red interactance (Futrex 5000) and skinfold thicknesses were made at five sites in young adults. In middle-aged men total body fat was assessed by densitometry, NIRI and skinfold thickness. Measurements were made in duplicate by a single trained observer.

RESULTS

Interactance measurements were related to subcutaneous adipose tissue thickness, although the relationship varied according to measurement site r = 0.09 at anterior thigh to 0.78 at biceps; P = 0.31 to < 0.0001). Muscle thickness explained additional variance in interactance only at biceps in women. Subcutaneous adipose tissue thickness correlated better with skinfold thickness (r = 0.56 to 0.92; P = 0.002 to < 0.0001) than with interactance. Mean difference in fat mass from densitometry +/- 95% limits of agreement was -1.61 +/- 7.68 kg for NIRI and -2.84 +/- 6.56 kg for skinfold thickness in middle-aged men. NIRI tended to underestimate higher (and overestimate lower) levels of fatness.

CONCLUSIONS

NIRI performed no better than skinfolds in assessment of either subcutaneous or total body fat.

摘要

目的

近红外交互作用（NIRI）已被用于评估全身脂肪含量，但其与测量部位成分之间的关系尚不清楚。本研究探讨了交互作用与皮下脂肪组织、肌肉厚度以及全身脂肪含量之间的关系。

设计

（i）通过与超声测量的皮下组织厚度进行比较来验证NIRI。（ii）对身体脂肪含量估计技术进行交叉验证。

地点

实验室。

受试者

（i）54名年轻人（27名男性和27名女性）和（ii）63名中年男性。

干预措施

在年轻人的五个部位使用超声测量皮下脂肪组织厚度和肌肉厚度、近红外交互作用（Futrex 5000）以及皮褶厚度。在中年男性中，通过密度测定法、NIRI和皮褶厚度评估全身脂肪。由一名经过培训的观察者进行两次测量。

结果

交互作用测量值与皮下脂肪组织厚度相关，尽管这种关系因测量部位而异，从大腿前部的r = 0.09到二头肌处的r = 0.78；P值从0.31到<0.0001）。仅在女性的二头肌处，肌肉厚度解释了交互作用中的额外变异。皮下脂肪组织厚度与皮褶厚度的相关性（r = 0.56至0.92；P = 0.002至<0.0001）优于与交互作用的相关性。在中年男性中，密度测定法测得的脂肪量平均差异±95%一致性界限，NIRI为-1.61±7.68 kg，皮褶厚度为-2.84±6.56 kg。NIRI往往低估较高（并高估较低）水平的脂肪含量。