---
language: nl
license: mit
pipeline_tag: text-classification
inference: false
---

# Regression Model for Respiration Functioning Levels

## Description
A fine-tuned regression model that assigns a functioning level to Dutch sentences describing respiration functions. The model is based on a pre-trained Dutch medical language model ([link to be added]()): a RoBERTa model, trained from scratch on clinical notes of the Amsterdam UMC. To detect sentences about respiration functions in clinical text in Dutch, use the [icf17-domains](https://huggingface.co/CLTL/icf17-domains) classification model. We use a single classifier for 17 different ICF categories to determine the level of functioning.

The following ICF categories are covered:


ICF code | Domain | name in repo
---|---|---
b1300 | Energy level | ENR
b140 | Attention functions | ATT
b152 | Emotional functions | STM
b440 | Respiration functions | ADM
b455 | Exercise tolerance functions | INS
b530 | Weight maintenance functions | MBW
d450 | Walking | FAC
d550 | Eating | ETN
d840-d859 | Work and employment | BER
B280 | Sensations of pain | SOP
B134 | Sleep functions | SLP
D760 | Family relationships | FML
B164 | Higher-level cognitive functions | HLC
D465 | Moving around using equipment | MAE
D410 | Changing basic body position | CBP
B230 | Hearing functions | HRN
D240 | Handling stress and other psychological demands | HSP

## Functioning levels
Level | Meaning
---|---
5 | No problem functioning
4 | No problem functioning or almost complete functioning
3 | Shortness of breath in exercise (saturation ≥90), and/or respiratory rate is slightly increased (EWS: 21-30).
2 | Shortness of breath in rest (saturation ≥90), and/or respiratory rate is fairly increased (EWS: 31-35).
1 | Needs oxygen at rest or during exercise (saturation <90), and/or respiratory rate >35.
0 | Mechanical ventilation is needed.

The predictions generated by the model might sometimes be outside of the scale (e.g. 4.2); this is normal in a regression model.


## Intended uses and limitations
- The model was fine-tuned (trained, validated and tested) on medical records from the Amsterdam UMC (the two academic medical centers of Amsterdam). It might perform differently on text from a different hospital or text from non-hospital sources (e.g. GP records).
- The model was fine-tuned with the [Simple Transformers](https://simpletransformers.ai/) library. This library is based on Transformers but the model cannot be used directly with Transformers `pipeline` and classes; doing so would generate incorrect outputs. For this reason, the API on this page is disabled.

## How to use
To generate predictions with the model, use the [Simple Transformers](https://simpletransformers.ai/) library:
```
from simpletransformers.classification import ClassificationModel

model = ClassificationModel(
    'roberta',
    'CLTL/icf-levels-adm',
    use_cuda=False,
)

example = 'Nu sinds 5-6 dagen progressieve benauwdheidsklachten (bij korte stukken lopen al kortademig), terwijl dit eerder niet zo was.'
_, raw_outputs = model.predict([example])
predictions = np.squeeze(raw_outputs)
```
The prediction on the example is:
```
2.26
```
The raw outputs look like this:
```
[[2.26074648]]
```

## Training data
- The training data consists of clinical notes from medical records (in Dutch) of the Amsterdam UMC. Due to privacy constraints, the data cannot be released.
- The annotation guidelines used for the project can be found [here](https://github.com/cltl/a-proof-zonmw/tree/main/resources/annotation_guidelines).

## Training procedure
The default training parameters of Simple Transformers were used, including:
- Optimizer: AdamW
- Learning rate: 4e-5
- Num train epochs: 1
- Train batch size: 8

## Evaluation results
The evaluation is done on a sentence-level (the classification unit) and on a note-level (the aggregated unit which is meaningful for the healthcare professionals).

| | Sentence-level | Note-level
|---|---|---
mean absolute error | 0.48 | 0.37
mean squared error | 0.55 | 0.34
root mean squared error | 0.74 | 0.58

## Authors and references
### Authors
Jenia Kim, Piek Vossen

### References
When using this repository please cite:

J. Kim, S. Verkijk, E. Geleijn, M. van der Leeden, C. Meskers, C. Meskers, S. van der Veen, P. Vossen, and G. Widdershoven, Modeling dutch medical texts for detecting functional categories and levels of covid-19 patients, 2022. In: Proceedings of the 13th Language Resources and Evaluation Conference, Marseille, June, 2022.

Bibtext:

@proceedings{kim-etal-lrec2022, author={Jenia Kim and Stella Verkijk and Edwin Geleijn and Marieke van der Leeden and Carel Meskers and Caroline Meskers and Sabina van der Veen and Piek Vossen and Guy Widdershoven}, title={Modeling Dutch Medical Texts for Detecting Functional Categories and Levels of COVID-19 Patients}, booktitle={Proceedings of the 13th Language Resources and Evaluation Conference, Marseille, June, 2022}, year={2022} }