We thank E. Hegendörfer and J-M. Degryse for their interest and request for clarification regarding the spirometry inclusion criteria of our study as well your suggestions on avenues for future research. As stated in our paper, up to a maximum of eight consecutive breathing manoeuvres were performed with the goal of completing at least three acceptable spirograms [1]. However, there was a minority of subjects who did not manage to perform more than one or two acceptable curves. After closer inspection and communication with the nurses responsible for the spirometries, it became clear that this was mostly an issue for the frail elderly. The proportion of examinations with less than three manoeuvres or how this influenced the results was not presented, so the question is therefore merited. As can be seen, there was little or no difference in outcome. http://bit.ly/2S9XqZe

中文翻译：

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在老年人肺功能测试中避免年龄歧视并促进独立于参考方程

我们感谢 E. Hegendörfer 和 JM。Degryse 表示他们对我们研究的肺活量测定纳入标准感兴趣并要求澄清，以及您对未来研究途径的建议。正如我们的论文中所述，最多连续进行八次呼吸动作，目标是完成至少三个可接受的肺量图 [1]。然而，有少数受试者未能完成一两条以上可接受的曲线。在与负责肺活量测量的护士进行仔细检查和沟通后，很明显这主要是体弱老人的问题。没有提出少于三个动作的考试比例或这如何影响结果，因此这个问题是值得的。可以看出，结果差异很小或没有差异。