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Clinical-Longformer is a clinical knowledge enriched version of Longformer that was further pre-trained using MIMIC-III clinical notes. It allows up to 4,096 tokens as the model input. Clinical-Longformer consistently out-performs ClinicalBERT across 10 baseline dataset for at least 2 percent. Those downstream experiments broadly cover named entity recognition (NER), question answering (QA), natural language inference (NLI) and text classification tasks. For more details, please refer to our paper. We also provide a sister model at Clinical-BigBIrd

Pre-training

We initialized Clinical-Longformer from the pre-trained weights of the base version of Longformer. The pre-training process was distributed in parallel to 6 32GB Tesla V100 GPUs. FP16 precision was enabled to accelerate training. We pre-trained Clinical-Longformer for 200,000 steps with batch size of 6ร—3. The learning rates were 3e-5 for both models. The entire pre-training process took more than 2 weeks.

Usage

Load the model directly from Transformers:

from transformers import AutoTokenizer, AutoModelForMaskedLM
tokenizer = AutoTokenizer.from_pretrained("yikuan8/Clinical-Longformer")
model = AutoModelForMaskedLM.from_pretrained("yikuan8/Clinical-Longformer")

Citing

If you find our model helps, please consider citing this :)

@article{li2023comparative,
  title={A comparative study of pretrained language models for long clinical text},
  author={Li, Yikuan and Wehbe, Ramsey M and Ahmad, Faraz S and Wang, Hanyin and Luo, Yuan},
  journal={Journal of the American Medical Informatics Association},
  volume={30},
  number={2},
  pages={340--347},
  year={2023},
  publisher={Oxford University Press}
}

Questions

Please email yikuanli2018@u.northwestern.edu

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