Hess Sonja Y, Hinnouho Guy-Marino, Barffour Maxwell A, Bounheuang Bangone, Arnold Charles D, Bell David, Marts Tola H, Kounnavong Sengchanh
1 Program in International and Community Nutrition, Department of Nutrition, University of California, Davis, Davis, CA, USA.
2 National Institute of Public Health, Vientiane, Lao People's Democratic Republic.
Food Nutr Bull. 2018 Mar;39(1):28-38. doi: 10.1177/0379572117742502. Epub 2017 Dec 19.
Measurements of mid-upper arm circumference (MUAC) may result in measurement error due to incorrect placement along the arm or tight pulling of tape. To reduce the risk of these measurement errors, a new wider tape was developed.
To compare the measurement agreement and precision and the ease of use of the standard and wide MUAC tapes.
Mid-upper arm circumference was measured in 814 children aged 9 to 32 months with both tapes. The midpoint of the upper arm was measured with the standard tape and estimated with the wide tape. Standardization sessions were implemented to assess intra- and interobserver precision.
Mid-upper arm circumference with the wide MUAC tape was significantly larger than the standard tape (mean [standard deviation]: 14.3 [1.0] cm vs 13.9 [1.0] cm; P < .001), resulting in a consistent bias of +0.41 cm. Forty-six (5.7%) children were identified with low MUAC <12.5 cm by standard tape compared with 10 (1.2%) by the wide tape ( P <.001). Because a new tape could be reproduced by correcting for this bias, we corrected measured results by subtracting 0.41 cm and mean MUAC by tape type was no longer significantly different. Intra- and interobserver technical error of measurement suggested a better precision with the wide MUAC tape.
Despite simplifying the measurement by approximating the midpoint of the upper arm, the wide MUAC tape tended to have better precision than the standard MUAC tape. However, there was a consistent measurement bias of +0.41 cm in mean MUAC. This first field test yielded promising results and led to further product adjustments.
由于沿手臂放置不正确或卷尺拉紧，上臂中部周长（MUAC）测量可能会导致测量误差。为降低这些测量误差风险，研发了一种新的更宽的卷尺。
比较标准和宽MUAC卷尺的测量一致性、精度及易用性。
使用两种卷尺对814名9至32个月大的儿童测量上臂中部周长。用标准卷尺测量上臂中点，用宽卷尺估算。开展标准化培训以评估观察者内和观察者间的精度。
宽MUAC卷尺测量的上臂中部周长显著大于标准卷尺（均值[标准差]：14.3[1.0]厘米对13.9[1.0]厘米；P<.001），导致一致偏差为+0.41厘米。标准卷尺测量出46名（5.7%）儿童的MUAC<12.5厘米，而宽卷尺测量出10名（1.2%）（P<.001）。由于可通过校正此偏差复制新卷尺，我们通过减去0.41厘米校正测量结果，按卷尺类型划分的平均MUAC不再有显著差异。观察者内和观察者间测量技术误差表明宽MUAC卷尺精度更高。
尽管通过近似上臂中点简化了测量，但宽MUAC卷尺的精度往往高于标准MUAC卷尺。然而，平均MUAC存在+0.41厘米的一致测量偏差。首次现场测试取得了有前景的结果并促使对产品作进一步调整。
