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arXiv 2112.05596cs.CLcs.AI
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临床试验结果的自动制表:一种基于转换器的语言表示的联合实体和关系抽取方法

Automated tabulation of clinical trial results: A joint entity and relation extraction approach with transformer-based language representations

University College London(伦敦大学学院)

Jetsun Whitton, Anthony Hunter

摘要:

循证医学是医疗保健专业人员在做出决策时参考最佳证据的实践,构成了现代医疗保健的基础。然而,它依赖于劳动密集型的系统评价,领域专家必须从数千篇出版物中汇总和提取信息,主要是随机对照试验(RCT)结果,并将其纳入证据表。本文研究了自动化的证据表生成的问题分解在两个语言处理任务:\textit{named entity recognition},它确定文本中的关键实体,如药品名称,和\textit{relation extraction},映射它们的关系,将它们分离成有序的元组。我们专注于从已发表的RCT摘要报告的研究结果的句子的自动制表。作为联合提取管道的一部分,开发了两个深度神经网络模型,使用了迁移学习和基于transformer的语言表示的原理。为了训练和测试这些模型,开发了一个新的金标准语料库,包括来自六个疾病领域的近600个结果句子。这种方法表现出了显著的优势,我们的系统在多个自然语言处理任务和疾病领域表现良好,并且在训练过程中看不到的疾病领域中表现良好。此外,我们还证明了这些结果是可以通过训练我们的模型来实现的,只要训练200个例句。最终的系统是一个概念证明,证据表的生成可以是半自动化的,代表着向完全自动化的系统评价迈出了一步。

英文摘要:

Evidence-based medicine, the practice in which healthcare professionals refer to the best available evidence when making decisions, forms the foundation of modern healthcare. However, it relies on labour-intensive systematic reviews, where domain specialists must aggregate and extract information from thousands of publications, primarily of randomised controlled trial (RCT) results, into evidence tables. This paper investigates automating evidence table generation by decomposing the problem across two language processing tasks: \textit{named entity recognition}, which identifies key entities within text, such as drug names, and \textit{relation extraction}, which maps their relationships for separating them into ordered tuples. We focus on the automatic tabulation of sentences from published RCT abstracts that report the results of the study outcomes. Two deep neural net models were developed as part of a joint extraction pipeline, using the principles of transfer learning and transformer-based language representations. To train and test these models, a new gold-standard corpus was developed, comprising almost 600 result sentences from six disease areas. This approach demonstrated significant advantages, with our system performing well across multiple natural language processing tasks and disease areas, as well as in generalising to disease domains unseen during training. Furthermore, we show these results were achievable through training our models on as few as 200 example sentences. The final system is a proof of concept that the generation of evidence tables can be semi-automated, representing a step towards fully automating systematic reviews.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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