modified_hoehn_yahr_scale: Modified Hoehn and Yahr Scale for Parkinson's Disease

In cliot: Clinical Indices and Outcomes Tools

Modified Hoehn and Yahr Scale for Parkinson's Disease

Description

Retrieves the clinical description for the Modified Hoehn and Yahr Scale. This system stages the severity of Parkinson's disease based on clinical findings regarding unilateral versus bilateral involvement and the preservation of postural reflexes.

Usage

modified_hoehn_yahr_scale(stage)

Arguments

stage

Numeric. The assessed stage of the patient. 1.0: Unilateral involvement only. 1.5: Unilateral and axial involvement. 2.0: Bilateral involvement without impairment of balance. 2.5: Mild bilateral disease with recovery on pull test. 3.0: Mild to moderate bilateral disease; some postural instability; physically independent. 4.0: Severe disability; still able to walk or stand unassisted. 5.0: Wheelchair bound or bedridden unless aided.

Value

A list containing:

Hoehn_Yahr_Stage	The input stage.
Description	The clinical definition associated with the stage.

References

Goetz CG, Poewe W, Rascol O, et al. Movement Disorder Society Task Force report on the Hoehn and Yahr staging scale: status and recommendations. Mov Disord. 2004;19(9):1020-1028. doi:10.1002/mds.20213 Hoehn MM, Yahr MD. Parkinsonism: onset, progression and mortality. Neurology. 1967;17(5):427-442.

Examples

# Example 1: Stage 2.5 (Mild Bilateral)
modified_hoehn_yahr_scale(2.5)

# Example 2: Stage 5 (Severe)
modified_hoehn_yahr_scale(5)

cliot documentation built on Dec. 1, 2025, 1:06 a.m.