Integration of the expanded disability status scale with ambulation, visual and cognitive tests

Area of Science:

• Neurology
• Clinical Assessment
• Multiple Sclerosis Research

Background:

• The Expanded Disability Status Scale (EDSS) is a standard measure for multiple sclerosis (MS) disability.
• Current EDSS calculation relies on neurological exams and self-reported performance, potentially leading to inaccurate Functional System scores (FSs).

Purpose of the Study:

• To compare EDSS scores derived from routine neurological examinations with those obtained after specific functional tests.
• To evaluate the impact of objective measurements on EDSS and FS assessments in MS patients.

Main Methods:

• 670 MS patients underwent standard neurological consultations.
• Objective assessments included visual acuity (optotype tables), ambulation (rodometer), and cognitive function (Brief International Cognitive assessment for MS - BICAMS).
• An integrated EDSS (iEDSS) was calculated using refined FS values and compared to the standard EDSS.

Main Results:

• Objective FS assessments (visual, cerebral, ambulation) yielded significantly higher scores than self-reported data.
• The mean iEDSS was significantly higher than the standard EDSS.
• Objective testing altered the EDSS in a majority of patients: 31% for visual, 10% for cognitive, 35% for ambulation, and 59% for all three.

Conclusions:

• Objective measurement of FSs leads to a more accurate EDSS score in nearly two-thirds of cases.
• This enhanced accuracy can improve patient evaluation, particularly during the transition or progressive phases of MS.
• Implementing objective testing provides a more reliable assessment of neurological function in MS.