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A cascaded approach for Chinese clinical text de-identification with less annotation effort.

Abstract：

:With rapid adoption of Electronic Health Records (EHR) in China, an increasing amount of clinical data has been available to support clinical research. Clinical data secondary use usually requires de-identification of personal information to protect patient privacy. Since manually de-identification of free clinical text requires significant amount of human work, developing an automated de-identification system is necessary. While there are many de-identification systems available for English clinical text, designing a de-identification system for Chinese clinical text faces many challenges such as unavailability of necessary lexical resources and sparsity of patient health information (PHI) in Chinese clinical text. In this paper, we designed a de-identification pipeline taking advantage of both rule-based and machine learning techniques. Our method, in particular, can effectively construct a data set with dense PHI information, which saves annotation time significantly for subsequent supervised learning. We experiment on a dataset of 3000 heterogeneous clinical documents to evaluate the annotation cost and the de-identification performance. Our approach can increase the efficiency of the annotation effort by over 60% while reaching performance as high as over 90% measured by F score. We demonstrate that combing rule-based and machine learning is an effective way to reduce the annotation cost and achieve high performance in Chinese clinical text de-identification task.

journal_name

J Biomed Inform

journal_title

Journal of biomedical informatics

authors

Jian Z,Guo X,Liu S,Ma H,Zhang S,Zhang R,Lei J

doi

10.1016/j.jbi.2017.07.017

subject

Has Abstract

pub_date

2017-09-01 00:00:00

pages

76-83

eissn

1532-0464

issn

1532-0480

pii

S1532-0464(17)30177-6

journal_volume

73

pub_type

杂志文章

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