Negation Detection for Clinical Text Mining in Russian

Anastasia Funkner, Ksenia Balabaeva, Sergey Kovalchuk
2020 Studies in Health Technology and Informatics  
Developing predictive modeling in medicine requires additional features from unstructured clinical texts. In Russia, there are no instruments for natural language processing to cope with problems of medical records. This paper is devoted to a module of negation detection. The corpus-free machine learning method is based on gradient boosting classifier is used to detect whether a disease is denied, not mentioned or presented in the text. The detector classifies negations for five diseases and
more » ... ws average F-score from 0.81 to 0.93. The benefits of negation detection have been demonstrated by predicting the presence of surgery for patients with the acute coronary syndrome.
doi:10.3233/shti200179 pmid:32570403 fatcat:lsshzuxu4vc5bmxsoagbzy7ztm