pyhealth.datasets.MIMIC3Dataset#

The open Medical Information Mart for Intensive Care (MIMIC-III) database, refer to doc for more information. We process this database into well-structured dataset object and give user the best flexibility and convenience for supporting modeling and analysis.

class pyhealth.datasets.MIMIC3Dataset(root, tables, dataset_name=None, config_path=None, **kwargs)[source]#

Bases: BaseDataset

A dataset class for handling MIMIC-III data.

This class is responsible for loading and managing the MIMIC-III dataset, which includes tables such as patients, admissions, and icustays.

root#

The root directory where the dataset is stored.

Type:: str

tables#

A list of tables to be included in the dataset.

Type:: List[str]

dataset_name#

The name of the dataset.

Type:: Optional[str]

config_path#

The path to the configuration file.

Type:: Optional[str]

Examples

>>> from pyhealth.datasets import MIMIC3Dataset
>>> # Load MIMIC-III dataset with clinical tables
>>> dataset = MIMIC3Dataset(
...     root="/path/to/mimic-iii/1.4",
...     tables=["diagnoses_icd", "procedures_icd", "labevents"],
... )
>>> dataset.stats()

preprocess_noteevents(df)[source]#

Table-specific preprocess function which will be called by BaseDataset.load_table().

Preprocesses the noteevents table by ensuring that the charttime column is populated. If charttime is null, it uses chartdate with a default time of 00:00:00.

See: https://mimic.mit.edu/docs/iii/tables/noteevents/#chartdate-charttime-storetime.

Parameters:: df (pl.LazyFrame) – The input dataframe containing noteevents data.
Returns:: The processed dataframe with updated charttime values.
Return type:: pl.LazyFrame

clean_tmpdir()#

Cleans up the temporary directory within the cache.

Return type:: None

create_tmpdir()#

Creates and returns a new temporary directory within the cache.

Returns:: The path to the new temporary directory.
Return type:: Path

property default_task: Optional[BaseTask]#

Returns the default task for the dataset.

Returns:: The default task, if any.
Return type:: Optional[BaseTask]

get_patient(patient_id)#

Retrieves a Patient object for the given patient ID.

Parameters:: patient_id (str) – The ID of the patient to retrieve.
Returns:: The Patient object for the given ID.
Return type:: Patient
Raises:: AssertionError – If the patient ID is not found in the dataset.

property global_event_df: LazyFrame#

Returns the path to the cached event dataframe.

Returns:: The path to the cached event dataframe.
Return type:: Path

iter_patients(df=None)#

Yields Patient objects for each unique patient in the dataset.

Yields:: Iterator[Patient] – An iterator over Patient objects.
Return type:: Iterator[Patient]

load_data()#

Loads data from the specified tables.

Returns:: A concatenated lazy frame of all tables.
Return type:: dd.DataFrame

load_table(table_name)#

Loads a table and processes joins if specified.

Parameters:

table_name (str) – The name of the table to load.

Returns:

The processed Dask dataframe for the table.

Return type:

dd.DataFrame

Raises:

ValueError – If the table is not found in the config.
FileNotFoundError – If the CSV file for the table or join is not found.

set_task(task=None, num_workers=None, input_processors=None, output_processors=None)#

Processes the base dataset to generate the task-specific sample dataset. The cache structure is as follows:

{task_name}_{task_uuid}/        # Cached data for specific task based on task name, schema, and args
    task_df.ld/                 # Intermediate task dataframe based on schema
    samples_{proc_uuid}.ld/     # Final processed samples after applying processors
        schema.pkl              # Saved SampleBuilder schema
        *.bin                   # Processed sample files

Parameters:

task (Optional[BaseTask]) – The task to set. Uses default task if None.
num_workers (int) – Number of workers for multi-threading. Default is self.num_workers.
input_processors (Optional[Dict[str, FeatureProcessor]]) – Pre-fitted input processors. If provided, these will be used instead of creating new ones from task’s input_schema. Defaults to None.
output_processors (Optional[Dict[str, FeatureProcessor]]) – Pre-fitted output processors. If provided, these will be used instead of creating new ones from task’s output_schema. Defaults to None.

Returns:

The generated sample dataset.

Return type:

SampleDataset

Raises:

AssertionError – If no default task is found and task is None.

stats()#

Prints statistics about the dataset.

Return type:: None

property unique_patient_ids: List[str]#

Returns a list of unique patient IDs.

Returns:: List of unique patient IDs.
Return type:: List[str]