Expanded Disability Status Scale
Expanded Disability Status Scale (EDSS)
The Expanded Disability Status Scale (EDSS) is a method of quantifying disability in Multiple Sclerosis (MS). It was developed by John F. Kurtzke in 1983 as an expansion of the earlier Disability Status Scale (DSS). The EDSS scale ranges from 0 to 10 in 0.5 unit increments, with 0 being no disability and 10 being death due to MS.
Pronunciation
Expanded Disability Status Scale: /ɪkˈspændɪd dɪˈsæbɪlɪti ˈstætəs skeɪl/
Etymology
The term "Expanded Disability Status Scale" is derived from its function. "Expanded" refers to the fact that it is a more detailed version of the original Disability Status Scale. "Disability Status" refers to the scale's purpose of measuring the level of disability in individuals with MS. "Scale" refers to the method of quantification used.
Related Terms
- Multiple Sclerosis: A chronic disease that affects the central nervous system, often leading to disability. The EDSS is commonly used to measure disability in individuals with MS.
- John F. Kurtzke: A neurologist who developed the EDSS.
- Disability Status Scale (DSS): The original scale from which the EDSS was expanded.
- Functional Systems Score (FSS): A part of the EDSS that assesses neurological impairment in eight functional systems.
Usage
The EDSS is used primarily in clinical trials and research settings to measure the progression of disability in patients with MS. It is less commonly used in routine clinical practice due to its complexity and the time required to administer it.
Limitations
The EDSS has been criticized for its heavy emphasis on ambulation and lack of sensitivity to changes in other functional systems. It is also less sensitive to changes in disability status in the lower range of the scale (0-4.0).
External links
- Medical encyclopedia article on Expanded Disability Status Scale
- Wikipedia's article - Expanded Disability Status Scale
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