Symptom severity classification with gradient tree boosting

Citation:

Yang Liu, Yu Gu, John Chu Nguyen, Haodan Li, Jiawei Zhang, Yuan Gao, and Yang Huang. 2017. “Symptom severity classification with gradient tree boosting.” J Biomed Inform, 75S, Pp. S105-S111.
Symptom severity classification with gradient tree boosting

Abstract:

In this paper, we present our system as submitted in the CEGS N-GRID 2016 task 2 RDoC classification competition. The task was to determine symptom severity (0-3) in a domain for a patient based on the text provided in his/her initial psychiatric evaluation. We first preprocessed the psychiatry notes into a semi-structured questionnaire and transformed the short answers into either numerical, binary, or categorical features. We further trained weak Support Vector Regressors (SVR) for each verbose answer and combined regressors' output with other features to feed into the final gradient tree boosting classifier with resampling of individual notes. Our best submission achieved a macro-averaged Mean Absolute Error of 0.439, which translates to a normalized score of 81.75%.
Last updated on 04/27/2018