Classifying the reported ability in clinical mobility descriptions

Denis Newman-Griffis, Ayah Zirikly, Guy Divita, Bart Desmet


Abstract
Assessing how individuals perform different activities is key information for modeling health states of individuals and populations. Descriptions of activity performance in clinical free text are complex, including syntactic negation and similarities to textual entailment tasks. We explore a variety of methods for the novel task of classifying four types of assertions about activity performance: Able, Unable, Unclear, and None (no information). We find that ensembling an SVM trained with lexical features and a CNN achieves 77.9% macro F1 score on our task, and yields nearly 80% recall on the rare Unclear and Unable samples. Finally, we highlight several challenges in classifying performance assertions, including capturing information about sources of assistance, incorporating syntactic structure and negation scope, and handling new modalities at test time. Our findings establish a strong baseline for this novel task, and identify intriguing areas for further research.
Anthology ID:
W19-5001
Volume:
Proceedings of the 18th BioNLP Workshop and Shared Task
Month:
August
Year:
2019
Address:
Florence, Italy
Venues:
ACL | BioNLP | WS
SIG:
SIGBIOMED
Publisher:
Association for Computational Linguistics
Note:
Pages:
1–10
Language:
URL:
https://aclanthology.org/W19-5001
DOI:
10.18653/v1/W19-5001
Bibkey:
Cite (ACL):
Denis Newman-Griffis, Ayah Zirikly, Guy Divita, and Bart Desmet. 2019. Classifying the reported ability in clinical mobility descriptions. In Proceedings of the 18th BioNLP Workshop and Shared Task, pages 1–10, Florence, Italy. Association for Computational Linguistics.
Cite (Informal):
Classifying the reported ability in clinical mobility descriptions (Newman-Griffis et al., 2019)
Copy Citation:
PDF:
https://aclanthology.org/W19-5001.pdf