### Quick start: run all comorbidipy commands

Source: https://vvcb.github.io/comorbidipy/cli

Quick start examples for the four main CLI commands: charlson, elixhauser, hfrs, and disability. Each command takes an input file and an output file.

```bash
# Calculate Charlson score
comorbidipy charlson input.csv output.csv

# Calculate Elixhauser score
comorbidipy elixhauser input.parquet output.parquet

# Calculate HFRS
comorbidipy hfrs input.csv output.csv

# Identify disabilities
comorbidipy disability input.csv output.csv

```

--------------------------------

### Install from source

Source: https://vvcb.github.io/comorbidipy/getting-started

Clone the repository and install in editable mode.

```bash
git clone https://github.com/vvcb/comorbidipy.git
cd comorbidipy
pip install -e .
```

--------------------------------

### Install via PyPI

Source: https://vvcb.github.io/comorbidipy/getting-started

Install the package using pip.

```bash
pip install comorbidipy
```

--------------------------------

### Clone and set up comorbidipy with uv

Source: https://vvcb.github.io/comorbidipy/contributing

Clone the repository, create a virtual environment and install dependencies with uv sync, then verify the installation by running pytest.

```bash
git clone https://github.com/yourusername/comorbidipy.git
cd comorbidipy

```

```bash
uv sync

```

```bash
uv run pytest

```

--------------------------------

### disability command examples

Source: https://vvcb.github.io/comorbidipy/cli

Examples for the disability command: basic usage and processing Parquet files.

```bash
# Basic disability identification
comorbidipy disability data.csv results.csv

# From Parquet to Parquet
comorbidipy disability data.parquet results.parquet

```

--------------------------------

### elixhauser command examples

Source: https://vvcb.github.io/comorbidipy/cli

Examples for the elixhauser command: basic usage and using Swiss weights with the --weights swiss option.

```bash
# Basic Elixhauser
comorbidipy elixhauser data.csv results.csv

# With Swiss weights
comorbidipy elixhauser data.parquet results.parquet --weights swiss

```

--------------------------------

### Verbose logging example

Source: https://vvcb.github.io/comorbidipy/cli

Example of verbose logging output when running charlson with --verbose. Shows the log messages that appear.

```bash
comorbidipy charlson input.csv output.csv --verbose

# Output:
# INFO: Reading input file: input.csv
# INFO: Found 1000 rows, 50 unique patients
# INFO: Calculating Charlson score with quan mapping
# INFO: Writing results to: output.csv
# INFO: Done!

```

--------------------------------

### Install comorbidipy with pip

Source: https://vvcb.github.io/comorbidipy

Install the comorbidipy package from PyPI using pip.

```bash
pip install comorbidipy

```

--------------------------------

### CLI: Basic and weighted Elixhauser calculation

Source: https://vvcb.github.io/comorbidipy/calculators/elixhauser

Shows how to run the Elixhauser index from the command line. Includes basic usage and examples with van Walraven and Swiss weights. Input and output files can be CSV or Parquet.

```bash
# Basic Elixhauser calculation
comorbidipy elixhauser input.csv output.csv

# With van Walraven weights
comorbidipy elixhauser input.parquet output.parquet --weights van_walraven

# With Swiss weights
comorbidipy elixhauser input.csv output.csv --weights swiss
```

--------------------------------

### hfrs command examples

Source: https://vvcb.github.io/comorbidipy/cli

Examples for the hfrs command: basic usage and custom column names using --id-col and --code-col.

```bash
# Basic HFRS
comorbidipy hfrs admissions.csv frailty.csv

# Custom column names
comorbidipy hfrs data.parquet results.parquet --id-col patient_id --code-col diagnosis

```

--------------------------------

### Example of disability identification with output

Source: https://vvcb.github.io/comorbidipy/calculators/disability

A complete example showing input DataFrame creation, processing with the disability function, and the resulting binary impairment flags.

```python
import polars as pl
from comorbidipy import disability

df = pl.DataFrame({
    "id": [
        "P001", "P001",  # LD + vision
        "P002",          # Hearing only
        "P003",          # No impairments
    ],
    "code": [
        "F70", "H541",   # Mild LD + low vision
        "H900",          # Conductive hearing loss
        "J18",           # Pneumonia (not an impairment)
    ],
})

result = disability(df, id_col="id", code_col="code")
print(result)

# Output:
# ┌──────┬────────┬─────────────────┬──────────────────┐
# │ id   ┆ ld_asd ┆ impaired_vision ┆ impaired_hearing │
# ╞══════╪════════╪═════════════════╪══════════════════╡
# │ P001 ┆ 1      ┆ 1               ┆ 0                │
# │ P002 ┆ 0      ┆ 0               ┆ 1                │
# │ P003 ┆ 0      ┆ 0               ┆ 0                │
# └──────┴────────┴─────────────────┴──────────────────┘
```

--------------------------------

### Python API: Example with multiple frailty indicators and output

Source: https://vvcb.github.io/comorbidipy/calculators/hfrs

Shows a complete example of calculating HFRS for a patient with multiple frailty indicators, including the printed output table. The output displays patient id, hfrs_score, and hfrs_category.

```python
import polars as pl
from comorbidipy import hfrs

# Patient with multiple frailty indicators
df = pl.DataFrame({
    "id": ["P001", "P001", "P001", "P002"],
    "code": [
        "F00",   # Dementia
        "W19",   # Fall
        "R26",   # Gait abnormality
        "J18",   # Pneumonia only
    ],
})

result = hfrs(df, id_col="id", code_col="code")
print(result)

# Output:
# ┌──────┬────────────┬───────────────┐
# │ id   ┆ hfrs_score ┆ hfrs_category │
# ╞══════╪════════════╪═══════════════╡
# │ P001 ┆ 8.5        ┆ Intermediate  │
# │ P002 ┆ 1.2        ┆ Low           │
# └──────┴────────────┴───────────────┘
```

--------------------------------

### charlson command examples

Source: https://vvcb.github.io/comorbidipy/cli

Examples for the charlson command: basic usage, Swedish mapping with age adjustment, and ICD-9 codes with Quan weights. The --age-col option enables age adjustment.

```bash
# Basic Charlson with defaults
comorbidipy charlson data.csv results.csv

# Swedish mapping with age adjustment
comorbidipy charlson data.csv results.parquet \
    --mapping swedish \
    --age-col patient_age

# ICD-9 codes with Quan weights
comorbidipy charlson data.csv results.csv \
    --icd-version 9 \
    --weights quan

```

--------------------------------

### Large file processing with Parquet

Source: https://vvcb.github.io/comorbidipy/cli

Example for processing large files using Parquet format, which supports lazy evaluation.

```bash
# Process large Parquet file efficiently
comorbidipy charlson large_data.parquet results.parquet

```

--------------------------------

### Example calculate_score function with Polars

Source: https://vvcb.github.io/comorbidipy/contributing

Example function following the project's Python guidelines: uses type annotations, docstring with Args/Returns/Raises sections, and Polars DataFrame operations.

```python
def calculate_score(
    df: pl.DataFrame,
    id_col: str = "id",
    value_col: str = "value",
) -> pl.DataFrame:
    """
    Calculate a score from input data.

    Args:
        df: Input DataFrame with patient data.
        id_col: Name of the column containing patient identifiers.
        value_col: Name of the column containing values.

    Returns:
        DataFrame with patient IDs and calculated scores.

    Raises:
        KeyError: If required columns are missing.
    """
    if id_col not in df.columns:
        raise KeyError(f"Column '{id_col}' not found in DataFrame")

    return df.group_by(id_col).agg(
        pl.col(value_col).sum().alias("score")
    )

```

--------------------------------

### Python API: Basic and weighted Elixhauser calculation

Source: https://vvcb.github.io/comorbidipy/calculators/elixhauser

Shows how to compute the Elixhauser index using the comorbidipy Python API. Includes basic calculation and examples with van Walraven and Swiss weights. Requires a Polars DataFrame with patient ID and ICD code columns.

```python
import polars as pl
from comorbidipy import comorbidity, ScoreType, WeightingVariant

df = pl.DataFrame({
    "patient_id": ["P001", "P001", "P002", "P002"],
    "icd_code": ["I50", "E11", "F32", "J44"],
})

# Basic Elixhauser calculation
result = comorbidity(
    df,
    id_col="patient_id",
    code_col="icd_code",
    score=ScoreType.ELIXHAUSER,
)

# With van Walraven weights
result = comorbidity(
    df,
    id_col="patient_id",
    code_col="icd_code",
    score=ScoreType.ELIXHAUSER,
    weighting=WeightingVariant.VAN_WALRAVEN,
)

# With Swiss weights
result = comorbidity(
    df,
    id_col="patient_id",
    code_col="icd_code",
    score=ScoreType.ELIXHAUSER,
    weighting=WeightingVariant.SWISS,
)
```

--------------------------------

### Test with synthetic data fixture

Source: https://vvcb.github.io/comorbidipy/contributing

Example test using the synthetic data fixture from tests/conftest.py to generate Charlson data and verify the comorbidity function returns the expected number of rows.

```python
def test_with_synthetic_data(generate_charlson_data):
    df = generate_charlson_data(n_patients=100, codes_per_patient=5)
    result = comorbidity(df, age=None)
    assert len(result) == 100

```

--------------------------------

### Catch KeyError from comorbidity() when columns are missing

Source: https://vvcb.github.io/comorbidipy/api

Shows how to catch a KeyError when the required columns are missing from the DataFrame. The example creates a Polars DataFrame with incorrect column names and attempts to call comorbidity with id_col="patient_id" and code_col="code", printing the missing column name in the exception message.

```python
from comorbidipy import comorbidity
import polars as pl

df = pl.DataFrame({"wrong_col": ["P001"], "also_wrong": ["I21"]})

try:
    result = comorbidity(df, id_col="patient_id", code_col="code")
except KeyError as e:
    print(f"Missing column: {e}")

```

--------------------------------

### disability: Identify learning disabilities and sensory impairments

Source: https://vvcb.github.io/comorbidipy/api

The disability function identifies learning disabilities and sensory impairments from ICD-10 codes. The example shows usage with a Polars DataFrame containing patient IDs and ICD codes. The function returns a DataFrame with binary flags for learning disability/ASD, visual impairment, and hearing impairment, and raises KeyError if required columns are missing.

```python
def disability(
    df: pl.DataFrame | pl.LazyFrame,
    id_col: str = "id",
    code_col: str = "code",
) -> pl.DataFrame:
    """
    Identify learning disabilities and sensory impairments from ICD-10 codes.

    Detects:
    - Learning disability / Autism Spectrum Disorder (F70-F79, F84)
    - Visual impairment (H54)
    - Hearing impairment (H90-H91)

    Args:
        df: DataFrame with patient IDs and ICD-10 codes.
        id_col: Name of the column containing patient identifiers.
        code_col: Name of the column containing ICD codes.

    Returns:
        DataFrame with columns:
        - Patient ID (original column name)
        - ld_asd: 1 if learning disability/ASD present, 0 otherwise
        - impaired_vision: 1 if visual impairment present, 0 otherwise
        - impaired_hearing: 1 if hearing impairment present, 0 otherwise

    Raises:
        KeyError: If required columns are missing from the input DataFrame.
    """


```

```python
import polars as pl
from comorbidipy import disability

df = pl.DataFrame({
    "id": ["P001", "P002"],
    "code": ["F70", "H90"],
})

result = disability(df, id_col="id", code_col="code")


```

--------------------------------

### Serve and build documentation with mkdocs

Source: https://vvcb.github.io/comorbidipy/contributing

Serve documentation locally with mkdocs serve and build the documentation with mkdocs build.

```bash
# Serve documentation locally
uv run mkdocs serve

# Build documentation
uv run mkdocs build

```

--------------------------------

### info command

Source: https://vvcb.github.io/comorbidipy/cli

Displays version number and available calculators.

```bash
comorbidipy info

```

--------------------------------

### Add a new calculator: module, export, CLI, and tests

Source: https://vvcb.github.io/comorbidipy/contributing

Steps to add a new calculator: create the module, export it from the package, add a CLI command, and write tests. The module uses Polars and the CLI uses Typer's @app.command().

```python
# src/comorbidipy/calculators/new_calculator.py
import polars as pl
import logging

logger = logging.getLogger(__name__)

def new_calculator(
    df: pl.DataFrame | pl.LazyFrame,
    id: str = "id",
    code: str = "code",
) -> pl.DataFrame:
    """Calculate new score."""
    logger.info("Calculating new score")
    # Implementation here
    return result

```

```python
from comorbidipy.calculators.new_calculator import new_calculator

__all__ = [
    # ... existing exports
    "new_calculator",
]

```

```python
@app.command()
def new_cmd(
    input_file: Path,
    output_file: Path,
    id: str = "id",
    code: str = "code",
    verbose: bool = False,
) -> None:
    """Calculate new score."""
    # Implementation

```

```python
import pytest
import polars as pl
from comorbidipy import new_calculator

def test_new_calculator_basic():
    df = pl.DataFrame({
        "id": ["P001", "P002"],
        "code": ["A00", "B00"],
    })
    result = new_calculator(df)
    assert "score" in result.columns

```

--------------------------------

### Use Command Line Interface

Source: https://vvcb.github.io/comorbidipy/getting-started

Process files directly using the CLI for various scores and options.

```bash
# View help
comorbidipy --help

# Calculate Charlson score
comorbidipy charlson input.csv output.parquet

# With options
comorbidipy charlson input.csv output.csv \
    --id-col patient_id \
    --code-col diagnosis_code \
    --age-col patient_age \
    --mapping quan \
    --weights charlson

# Calculate HFRS
comorbidipy hfrs-cmd input.parquet output.parquet

# Show available options
comorbidipy info
```

--------------------------------

### Run checks before commit

Source: https://vvcb.github.io/comorbidipy/contributing

Run the required checks before committing: format with ruff, lint with ruff, and run the test suite.

```bash
uv run ruff format
uv run ruff check
uv run pytest

```

--------------------------------

### Calculate Charlson score with comorbidipy Python API

Source: https://vvcb.github.io/comorbidipy

Use the Python API to calculate the Charlson Comorbidity Index from a Polars DataFrame. The example creates a sample DataFrame with id, code, and age columns, then calls comorbidity() and prints the result.

```python
import polars as pl
from comorbidipy import comorbidity, hfrs, disability

# Sample data
df = pl.DataFrame({
    "id": ["P001", "P001", "P002", "P002"],
    "code": ["I21", "E112", "I50", "J44"],
    "age": [65, 65, 72, 72],
})

# Calculate Charlson Comorbidity Index
result = comorbidity(df, id="id", code="code", age="age")
print(result)

```

--------------------------------

### Complete workflow: charlson with age adjustment

Source: https://vvcb.github.io/comorbidipy/cli

Complete workflow: inspect input, run charlson with age adjustment and verbose logging, then check results. The input file is shown with sample rows.

```bash
# 1. Check input file
head -5 input.csv
# id,code,age
# P001,I21,65
# P001,E112,65
# P002,I50,72

# 2. Calculate Charlson with age adjustment
comorbidipy charlson input.csv output.csv \
    --age-col age \
    --verbose

# 3. Check results
head -5 output.csv

```

--------------------------------

### Use Parquet format for performance

Source: https://vvcb.github.io/comorbidipy/getting-started

Parquet files offer faster read/write performance compared to CSV.

```python
# Read Parquet
df = pl.read_parquet("data.parquet")

# Or use CLI
comorbidipy charlson input.parquet output.parquet
```

--------------------------------

### comorbidity: Calculate Charlson or Elixhauser scores

Source: https://vvcb.github.io/comorbidipy/api

The comorbidity function calculates Charlson or Elixhauser scores from ICD codes. The example shows usage with a Polars DataFrame, specifying patient ID, diagnosis code, and age columns. The function returns a DataFrame with binary flags and scores, and raises KeyError or ValueError for missing columns or invalid combinations.

```python
def comorbidity(
    df: pl.DataFrame | pl.LazyFrame,
    id_col: str = "id",
    code_col: str = "code",
    age_col: str | None = None,
    score: ScoreType = ScoreType.CHARLSON,
    icd: ICDVersion = ICDVersion.ICD10,
    variant: MappingVariant = MappingVariant.QUAN,
    weighting: WeightingVariant = WeightingVariant.QUAN,
    assign0: bool = True,
) -> pl.DataFrame:
    """
    Calculate comorbidity scores from ICD diagnosis codes.

    Args:
        df: DataFrame with patient IDs and ICD codes.
        id_col: Name of the column containing patient identifiers.
        code_col: Name of the column containing ICD codes.
        age_col: Name of the column containing patient age (optional).
            When provided with Charlson score and Charlson weights,
            enables age adjustment and survival calculation.
        score: Type of comorbidity score (CHARLSON or ELIXHAUSER).
        icd: Version of ICD codes (ICD9 or ICD10).
        variant: Mapping variant for ICD code classification.
        weighting: Weighting scheme for calculating the score.
        assign0: Whether to zero out less severe conditions when
            more severe forms are present.

    Returns:
        DataFrame with patient IDs, binary comorbidity flags,
        and calculated scores.

    Raises:
        KeyError: If required columns are missing from the input DataFrame.
        ValueError: If invalid combination of score/mapping/weighting is used.
    """


```

```python
import polars as pl
from comorbidipy import comorbidity, ScoreType, MappingVariant

df = pl.DataFrame({
    "patient_id": ["P001", "P001", "P002"],
    "diagnosis": ["I21", "E112", "I50"],
    "patient_age": [65, 65, 72],
})

result = comorbidity(
    df,
    id_col="patient_id",
    code_col="diagnosis",
    age_col="patient_age",
    score=ScoreType.CHARLSON,
)


```

--------------------------------

### hfrs: Calculate Hospital Frailty Risk Score

Source: https://vvcb.github.io/comorbidipy/api

The hfrs function calculates the Hospital Frailty Risk Score from ICD-10 codes. The example shows usage with a Polars DataFrame containing patient IDs and ICD codes. The function returns a DataFrame with hfrs_score and hfrs_category columns, and raises KeyError if required columns are missing. The HFRS is validated for patients aged 75 and older.

```python
def hfrs(
    df: pl.DataFrame | pl.LazyFrame,
    id_col: str = "id",
    code_col: str = "code",
) -> pl.DataFrame:
    """
    Calculate Hospital Frailty Risk Score from ICD-10 codes.

    The HFRS identifies frailty in hospital patients using 109
    ICD-10 codes associated with frailty conditions.

    Args:
        df: DataFrame with patient IDs and ICD-10 codes.
        id_col: Name of the column containing patient identifiers.
        code_col: Name of the column containing ICD codes.

    Returns:
        DataFrame with columns:
        - Patient ID (original column name)
        - hfrs_score: Continuous frailty score
        - hfrs_category: "Low" (<5), "Intermediate" (5-15), or "High" (>15)

    Raises:
        KeyError: If required columns are missing from the input DataFrame.

    Note:
        The HFRS is validated for patients aged 75 years and older.
    """


```

```python
import polars as pl
from comorbidipy import hfrs

df = pl.DataFrame({
    "id": ["P001", "P001", "P002"],
    "code": ["F00", "R26", "J18"],
})

result = hfrs(df, id_col="id", code_col="code")


```

--------------------------------

### Format and lint with ruff

Source: https://vvcb.github.io/comorbidipy/contributing

Format code with ruff, check for linting issues, and fix auto-fixable issues.

```bash
# Format code
uv run ruff format

# Check for linting issues
uv run ruff check

# Fix auto-fixable issues
uv run ruff check --fix

```

--------------------------------

### Run comorbidipy CLI commands for Charlson, Elixhauser, HFRS, and info

Source: https://vvcb.github.io/comorbidipy

Use the comorbidipy command-line interface to calculate Charlson, Elixhauser, and HFRS scores, and to show available options. The commands specify input/output files and mapping/weight options.

```bash
# Calculate Charlson score
comorbidipy charlson input.csv output.parquet --mapping quan --weights charlson

# Calculate Elixhauser score
comorbidipy elixhauser input.csv output.csv --weights van_walraven

# Calculate HFRS
comorbidipy hfrs-cmd patients.parquet results.parquet

# Show available options
comorbidipy info

```

--------------------------------

### CLI: Basic HFRS calculation and options

Source: https://vvcb.github.io/comorbidipy/calculators/hfrs

Run the comorbidipy CLI to calculate HFRS from a CSV or Parquet file. The basic command uses default column names, while custom columns can be specified with --id-col and --code-col. Output can be written as Parquet by using a .parquet extension.

```bash
# Basic HFRS calculation
comorbidipy hfrs input.csv output.csv

# With custom columns
comorbidipy hfrs input.parquet output.parquet --id-col pat_id --code-col diagnosis

# Output as Parquet
comorbidipy hfrs input.csv output.parquet
```

--------------------------------

### Run tests with uv run pytest

Source: https://vvcb.github.io/comorbidipy/contributing

Commands to run the test suite, with coverage, for a specific file, or matching a pattern.

```bash
# Run all tests
uv run pytest

# Run with coverage
uv run pytest --cov=comorbidipy

# Run specific test file
uv run pytest tests/test_comorbidity.py

# Run tests matching a pattern
uv run pytest -k "charlson"

```

--------------------------------

### CLI: comorbidipy charlson with --mapping, --weights, --age-col

Source: https://vvcb.github.io/comorbidipy/calculators/charlson

Shows the CLI usage for the charlson command. The first command runs a basic calculation, the second specifies mapping, weights, and an age column, and the third uses the Swedish mapping. Output files can be CSV or Parquet.

```bash
# Basic Charlson calculation
comorbidipy charlson input.csv output.csv

# With specific mapping and weights
comorbidipy charlson input.csv output.parquet \
    --mapping quan \
    --weights charlson \
    --age-col age

# Using Swedish mapping
comorbidipy charlson input.csv output.csv --mapping swedish

```

--------------------------------

### Process large files with streaming

Source: https://vvcb.github.io/comorbidipy/getting-started

Use the --streaming flag for files that do not fit in memory.

```bash
comorbidipy charlson large_input.parquet output.parquet --streaming
```

--------------------------------

### Type check with mypy

Source: https://vvcb.github.io/comorbidipy/contributing

Run type checking with mypy on the source directory.

```bash
uv run mypy src/comorbidipy

```

--------------------------------

### Run disability identification via CLI

Source: https://vvcb.github.io/comorbidipy/calculators/disability

Execute disability identification from the command line. Supports input/output file paths and custom column naming for IDs and diagnosis codes.

```bash
# Basic disability identification
comorbidipy disability input.csv output.csv

# With custom columns
comorbidipy disability input.parquet output.parquet --id-col pat_id --code-col diagnosis

# Output as Parquet
comorbidipy disability input.csv output.parquet
```

--------------------------------

### Prepare data for analysis

Source: https://vvcb.github.io/comorbidipy/getting-started

Create a Polars DataFrame with patient identifiers and ICD codes.

```python
import polars as pl

# Example data format
df = pl.DataFrame({
    "id": ["P001", "P001", "P001", "P002", "P002"],
    "code": ["I21", "E112", "I50", "J44", "K703"],
    "age": [65, 65, 65, 72, 72],  # Optional for age-adjusted scores
})
```

--------------------------------

### Import All Public API from comorbidipy

Source: https://vvcb.github.io/comorbidipy/api

Imports all public functions and enums from comorbidipy for type hints and usage. Provides IDE support with full type annotations.

```python
from comorbidipy import (
    comorbidity,
    hfrs,
    disability,
    ScoreType,
    ICDVersion,
    MappingVariant,
    WeightingVariant,
)

```

--------------------------------

### Batch processing multiple files

Source: https://vvcb.github.io/comorbidipy/cli

Batch processing: loop over CSV files and run charlson on each, saving results to a results directory.

```bash
# Process multiple files
for f in data/*.csv; do
    comorbidipy charlson "$f" "results/$(basename "$f")"
done

```

--------------------------------

### disability command usage

Source: https://vvcb.github.io/comorbidipy/cli

Usage syntax for the disability command. Options include --id-col, --code-col, --verbose, and others.

```bash
comorbidipy disability [OPTIONS] INPUT OUTPUT

```

--------------------------------

### Python API: Disable assign zero logic

Source: https://vvcb.github.io/comorbidipy/calculators/elixhauser

Shows how to keep both uncomplicated and complicated forms of conditions by setting assign0=False. By default (assign0=True), the uncomplicated form is set to 0 when the complicated form is present.

```python
result = comorbidity(df, assign0=False)
```

--------------------------------

### elixhauser command usage

Source: https://vvcb.github.io/comorbidipy/cli

Usage syntax for the elixhauser command. Options include --weights, --icd-version, and --no-assign0.

```bash
comorbidipy elixhauser [OPTIONS] INPUT OUTPUT

```

--------------------------------

### charlson command usage

Source: https://vvcb.github.io/comorbidipy/cli

Usage syntax for the charlson command. Options include --mapping, --weights, --age-col, --icd-version, and --no-assign0.

```bash
comorbidipy charlson [OPTIONS] INPUT OUTPUT

```

--------------------------------

### Use LazyFrame for deferred computation

Source: https://vvcb.github.io/comorbidipy/getting-started

Utilize Polars LazyFrame for memory-efficient processing.

```python
# Use LazyFrame for memory efficiency
lazy_df = pl.scan_parquet("large_file.parquet")
result = comorbidity(lazy_df, id="id", code="code", age=None)
```

--------------------------------

### Python: comorbidity() with assign0=False

Source: https://vvcb.github.io/comorbidipy/calculators/charlson

Shows how to keep both the less severe and more severe forms of a condition by setting assign0=False. By default assign0=True sets the less severe form to 0 when the more severe form is present.

```python
result = comorbidity(df, assign0=False)

```

--------------------------------

### hfrs command usage

Source: https://vvcb.github.io/comorbidipy/cli

Usage syntax for the hfrs command. Options include --id-col, --code-col, --verbose, and others.

```bash
comorbidipy hfrs [OPTIONS] INPUT OUTPUT

```

--------------------------------

### Use LazyFrame with comorbidity Function

Source: https://vvcb.github.io/comorbidipy/api

Shows how to use comorbidipy with a Polars LazyFrame for memory-efficient processing. The function collects data lazily and returns an eager DataFrame with results.

```python
import polars as pl
from comorbidipy import comorbidity

# LazyFrame for memory-efficient processing
lf = pl.scan_parquet("large_file.parquet")
result = comorbidity(lf, id_col="id", code_col="code")

```

--------------------------------

### Calculate Elixhauser Comorbidity Index

Source: https://vvcb.github.io/comorbidipy/getting-started

Compute the Elixhauser score using the Van Walraven weighting.

```python
result = comorbidity(
    df,
    id_col="id",
    code_col="code",
    score=ScoreType.ELIXHAUSER,
    weighting=WeightingVariant.VAN_WALRAVEN,
)
```

--------------------------------

### Calculate Hospital Frailty Risk Score

Source: https://vvcb.github.io/comorbidipy/getting-started

Compute the HFRS using patient identifiers and ICD codes.

```python
from comorbidipy import hfrs

# HFRS only requires id and code
result = hfrs(df, id_col="id", code_col="code")
```

--------------------------------

### Pipeline usage: pipe charlson output

Source: https://vvcb.github.io/comorbidipy/cli

Pipeline usage: pipe the output of charlson to another tool (csvstat) for further analysis.

```bash
# Chain with other tools
comorbidipy charlson input.csv /dev/stdout | \
    csvstat --mean comorbidity_score

```

--------------------------------

### WeightingVariant Enum for Score Weighting

Source: https://vvcb.github.io/comorbidipy/api

Defines the weighting scheme for score calculation. CHARLSON, QUAN, SHMI, and SHMI_MODIFIED are for Charlson scores; VAN_WALRAVEN and SWISS are for Elixhauser scores.

```python
class WeightingVariant(StrEnum):
    CHARLSON = "charlson"
    QUAN = "quan"
    SHMI = "shmi"
    SHMI_MODIFIED = "shmi_modified"
    VAN_WALRAVEN = "van_walraven"
    SWISS = "swiss"

```

--------------------------------

### disability

Source: https://vvcb.github.io/comorbidipy/api

Identifies learning disabilities and sensory impairments from ICD-10 codes. Detects learning disability/ASD, visual impairment, and hearing impairment.

```APIDOC
## disability

### Description
Identify learning disabilities and sensory impairments from ICD-10 codes. Detects:
- Learning disability / Autism Spectrum Disorder (F70-F79, F84)
- Visual impairment (H54)
- Hearing impairment (H90-H91)

### Function Signature
```python
def disability(
    df: pl.DataFrame | pl.LazyFrame,
    id_col: str = "id",
    code_col: str = "code",
) -> pl.DataFrame:
```

### Parameters
- **df** (pl.DataFrame | pl.LazyFrame) - Required - DataFrame with patient IDs and ICD-10 codes.
- **id_col** (str) - Optional - Name of the column containing patient identifiers. Default: "id".
- **code_col** (str) - Optional - Name of the column containing ICD codes. Default: "code".

### Returns
- **pl.DataFrame** - DataFrame with columns:
  - Patient ID (original column name)
  - ld_asd: 1 if learning disability/ASD present, 0 otherwise
  - impaired_vision: 1 if visual impairment present, 0 otherwise
  - impaired_hearing: 1 if hearing impairment present, 0 otherwise

### Raises
- **KeyError** - If required columns are missing from the input DataFrame.

### Example
```python
import polars as pl
from comorbidipy import disability

df = pl.DataFrame({
    "id": ["P001", "P002"],
    "code": ["F70", "H90"],
})

result = disability(df, id_col="id", code_col="code")
```
```