使用解剖学标度控制吞咽时舌骨运动测量中的基于性别的大小差异。
Use of an anatomical scalar to control for sex-based size differences in measures of hyoid excursion during swallowing.
出版信息
J Speech Lang Hear Res. 2014 Jun 1;57(3):768-78. doi: 10.1044/2014_JSLHR-S-13-0152.
PURPOSE
Traditional methods for measuring hyoid excursion from dynamic videofluoroscopy recordings involve calculating changes in position in absolute units (mm). This method shows a high degree of variability across studies but agreement that greater hyoid excursion occurs in men than in women. Given that men are typically taller than women, the authors hypothesized that controlling for participant size might neutralize apparent sex-based differences in hyoid excursion.
METHOD
Hyoid excursion in 20 young (<45) healthy volunteers (10 male), stratified by height, was measured in a tightly controlled videofluoroscopic protocol.
RESULTS
The study identified an anatomical scalar (C2-C4 length), visible on the videofluoroscopic image, correlated with participant height. This scalar differed significantly between men and women. By incorporating the anatomical scalar as a continuous covariate in repeated measures mixed-model analyses of variance of hyoid excursion, apparent sex-based differences were neutralized. Transforming measures of hyoid excursion into anatomically scaled units achieved the same result, reducing variation attributable to sex-based differences in participant size.
CONCLUSIONS
Hyoid excursion during swallowing is dependent on a person's size. If measurements do not control for this source of variation, apparent sex differences in hyoid excursion are seen.
目的
从动态透视视频记录中测量舌骨位移的传统方法涉及以绝对单位（mm）计算位置变化。这种方法在不同的研究中表现出高度的可变性，但一致认为男性的舌骨位移比女性大。由于男性通常比女性高，作者假设控制参与者的体型可能会消除舌骨位移中明显的性别差异。
方法
在严格控制的透视视频协议中，对 20 名年轻（<45 岁）健康志愿者（10 名男性）按身高分层，测量舌骨位移。
结果
研究确定了一个在透视图像上可见的解剖学标度（C2-C4 长度），与参与者的身高相关。该标度在男性和女性之间有显著差异。通过将解剖学标度作为连续协变量纳入舌骨位移重复测量混合模型方差分析，消除了明显的基于性别的差异。将舌骨位移的测量值转换为解剖学标度单位也达到了同样的效果，减少了因参与者体型的性别差异而产生的变异。
结论
吞咽过程中的舌骨位移取决于一个人的体型。如果测量不控制这种变化来源，就会看到舌骨位移中明显的性别差异。
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