---
license: mit
task_categories:
- time-series-forecasting
language:
- en
pretty_name: Scent of Health (S-OH)
tags:
- electronic-nose
- breath-analysis
- disease-screening
- multivariate-time-series
- medical-dataset
size_categories:
- 1K<n<10K
configs:
- config_name: default
  data_files:
    - S-OH_metadata.csv
  features:
    - name: Patient_id
      dtype: int64
    - name: Patient_age
      dtype: int64
    - name: Patient_gender
      dtype: string
    - name: Diagnosis
      dtype: string
    - name: D_class
      dtype: int64
    - name: D_bin_class
      dtype: int64
    - name: Datetime
      dtype: string
    - name: Week
      dtype: int64
    - name: Site
      dtype: string
---

# Scent of Health (S-OH) Dataset

The **Scent of Health (S-OH)** dataset is the largest public clinical electronic nose (eNose) collection for non-invasive disease screening via exhaled breath analysis. It comprises **1,234 patients** across **nine diagnostic groups** (healthy controls and eight diseases), each providing a **17-channel multivariate time series** of breath measurements.

| Property | Value |
|----------|-------|
| **Patients** | 1,234 |
| **Diagnostic groups** | 9 (healthy + 8 diseases) |
| **Time series channels** | 17 (eNose sensors) + auxiliary sensors |
| **Sampling rate** | 0.4 Hz |
| **Duration per sample** | 895 seconds (~15 minutes) |
| **Collection period** | 13 consecutive weeks |
| **Clinical sites** | 2 |

## Diagnostic Groups

| ICD-10 Code | Diagnosis | Count |
|-------------|-----------|-------|
| Z00 | Healthy controls | 256 |
| E11 | Diabetes mellitus type II | 128 |
| K29 | Gastritis and duodenitis | 138 |
| K76 | Non-alcoholic fatty liver disease | 128 |
| B18 | Hepatitis B/C | 138 |
| C34 | Lung cancer | 100 |
| N18 | Chronic renal failure | 128 |
| J44 | COPD | 100 |
| A15 | Respiratory tuberculosis | 118 |
| **Total** | | **1,234** |

**Demographics:**
- Age range: 18–89 years (mean 53.9, std 13.4)
- Gender: 690 female (55.9%), 544 male (44.1%)

# Dataset Structure

### File 1: `S-OH_metadata.csv`

CSV file containing patient metadata with the following columns:

| Column | Description |
|--------|-------------|
| `Patient_id` | Unique patient identifier |
| `Patient_age` | Age in years |
| `Patient_gender` | Gender (male or female) |
| `Diagnosis` | ICD-10 diagnosis code |
| `D_class` | Disease class (0–8) |
| `D_bin_class` | Binary class for one-vs-rest classification |
| `Datetime` | Collection timestamp |
| `Week` | Collection week (1–13) |
| `Site` | Clinical site (MONIKI or CRIT) |

### File 2: `S-OH_data_dict.json`

JSON dictionary where each key is a patient ID (as string) with the following structure:

```json
{
    "patient_id": int,
    "patient_diag_class": int,
    "startDateTime": "ISO timestamp",
    "startTimeGases": int,
    "endTimeGases": int,
    "durationSec": int,
    "sensors": [
        {
            "id": "enose",
            "sampleRate": 0.4,
            "channels": [
                {"id": "R1", "samples": [float, ...]},
                {"id": "R2", "samples": [float, ...]},
                ...
                {"id": "R17", "samples": [float, ...]},
                {"id": "humidity", "samples": [float, ...]},
                {"id": "temperature", "samples": [float, ...]}
            ]
        },
        {
            "id": "ze03",
            "sampleRate": 0.4,
            "channels": [{"id": "0", "samples": [float, ...]}]
        },
        {
            "id": "mhz14",
            "sampleRate": 0.4,
            "channels": [{"id": "0", "samples": [float, ...]}]
        },
        {
            "id": "ze08",
            "sampleRate": 0.4,
            "channels": [{"id": "0", "samples": [float, ...]}]
        },
        {
            "id": "bme280",
            "sampleRate": 0.4,
            "channels": [
                {"id": "pressure", "samples": [float, ...]},
                {"id": "temperature", "samples": [float, ...]},
                {"id": "humidity", "samples": [float, ...]}
            ]
        }
    ]
}
```

# eNose Channels (17 channels)

The eNose sensor array consists of 17 channels printed on a single chip:

| Channel ID | Material |
|-------------|-----------|
| R1–R17 | ZnO and metal-doped ZnO (In-ZnO, Ag-ZnO, Ce-ZnO, Ni-ZnO) |


# Auxiliary Sensors

| Sensor ID | Measurements |
|-------------|-----------|
| ze03  | Ozone (O₃) |
| mhz14 | Carbon dioxide (CO₂) |
| ze08  | Carbon monoxide (CO) |
| bme280  | Pressure, temperature, humidity |

# Temporal Train/Test Splits
The dataset includes explicit temporal splits to enable drift-aware evaluation. For each disease, test weeks were selected to be temporally separated from training weeks, simulating real-world deployment conditions.

# Ethics
- The study protocol was approved by the Local Ethics Committee at Moscow Regional Research and Clinical Institute (MONIKI) and Central Research Institute of Tuberculosis (CRIT).

- All participants provided written informed consent.

# Citation
If you use this dataset in your research, please cite:
```bibtex

```

## License

This dataset is released under the **MIT License**. You are free to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the dataset, subject to the following conditions:

> Permission is hereby granted, free of charge, to any person obtaining a copy of this dataset and associated documentation files (the "Dataset"), to deal in the Dataset without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Dataset, and to permit persons to whom the Dataset is furnished to do so, subject to the following conditions:
>
> The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Dataset.
>
> THE DATASET IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE DATASET OR THE USE OR OTHER DEALINGS IN THE DATASET.

#### Contact
For questions or issues, please open an issue on this repository or contact the authors (see paper for details).