Department of Agricultural, Food, and Nutritional Sciences, Division of Human Nutrition, University of Alberta, Edmonton, Alberta, Canada; University of Colorado School of Medicine, Division of Endocrinology, Metabolism, and Diabetes, Aurora, CO, USA; University of Colorado School of Medicine, Division of Pediatrics, Section of Nutrition, Aurora, CO, USA.
Department of Agricultural, Food, and Nutritional Sciences, Division of Human Nutrition, University of Alberta, Edmonton, Alberta, Canada; Nutrition Services, Alberta Health Services, Edmonton, Alberta, Canada.
Clin Nutr ESPEN. 2020 Oct;39:67-73. doi: 10.1016/j.clnesp.2020.07.017. Epub 2020 Aug 17.
BACKGROUND/OBJECTIVES: Resting energy expenditure (REE) is the largest component of total energy expenditure. As such, inaccurate estimation or measurement of REE may impact the development of individualized energy intake recommendations. The objective of this observational study was to assess the accuracy and reliability of REE measured with a portable indirect calorimeter with ventilated hood - Fitmate GS - compared to REE from whole-body indirect calorimetry (WBC).
REE was assessed using the Fitmate GS and compared to REE from WBC in male and female adults. Fitmate GS tests were repeated on a separate visit. Body fat percent, fat mass, and fat-free mass were assessed using dual X-ray absorptiometry in a subset of individuals with body mass index (BMI) ≥35 kg/m. Paired t-tests and Bland-Altman analyses were used to describe REE accuracy; intra-class correlation coefficient (ICC) examined test-retest reliability of repeated Fitmate GS assessments.
Fitmate GS and WBC REE was assessed in 77 adults (age 32 ± 8 years; 63.6% females; 53.2% with BMI ≥ 30 kg/m). The Fitmate GS underestimated REE (1680 ± 420 vs. 1916 ± 461 kcal/day, p < 0.001) and wide limits of agreement were observed (95% confidence intervals [CI]: -727, 246 kcal/day). Bias was similar across sex and BMI categories and did not correlate to any body composition parameter. Fitmate GS ICC was 0.80 (95% CI: 0.70-0.87), indicating 'good' reliability with repeated testing after median follow-up of 4 days (interquartile range 2-7 days).
The Fitmate GS did not accurately quantify REE but produced reliable REE measurements.
背景/目的：静息能量消耗（REE）是总能量消耗中最大的组成部分。因此，REE 的不准确估计或测量可能会影响个体化能量摄入建议的制定。本观察性研究的目的是评估带有通风罩的便携式间接测热仪 - Fitmate GS 测量的 REE 与全身间接测热法（WBC）相比的准确性和可靠性。
使用 Fitmate GS 评估 REE，并与男性和女性成年人的 WBC 进行比较。在另一次就诊时重复 Fitmate GS 测试。在身体质量指数（BMI）≥35 kg/m 的个体亚组中，使用双 X 射线吸收法评估体脂肪百分比、脂肪量和去脂体重。使用配对 t 检验和 Bland-Altman 分析描述 REE 的准确性；采用组内相关系数（ICC）检验重复 Fitmate GS 评估的测试 - 重测可靠性。
在 77 名成年人（年龄 32 ± 8 岁；63.6%为女性；53.2%的 BMI≥30 kg/m）中评估了 Fitmate GS 和 WBC 的 REE。Fitmate GS 低估了 REE（1680 ± 420 与 1916 ± 461 kcal/天，p<0.001），并且观察到较宽的一致性界限（95%置信区间[CI]：-727，246 kcal/天）。性别和 BMI 类别之间的偏差相似，并且与任何身体成分参数均无相关性。Fitmate GS ICC 为 0.80（95%CI：0.70-0.87），表明在中位数随访 4 天（四分位距 2-7 天）后重复测试具有“良好”可靠性。
Fitmate GS 不能准确量化 REE，但可产生可靠的 REE 测量值。
