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Related Experiment Video

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The Multiple Sclerosis Performance Test (MSPT): An iPad-Based Disability Assessment Tool
11:35

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Published on: June 30, 2014

The symptom inventory disability-specific short forms for multiple sclerosis: construct validity, responsiveness, and

Carolyn E Schwartz1, Rita K Bode, Brian R Quaranto

  • 1DeltaQuest Foundation, Inc, Concord, MA 01742, USA. carolyn.schwartz@deltaquest.org

Archives of Physical Medicine and Rehabilitation
|May 15, 2012
PubMed
Summary
This summary is machine-generated.

The Symptom Inventory

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Area of Science:

  • Neurology
  • Psychometrics
  • Health Outcomes Research

Background:

  • Multiple sclerosis (MS) symptom assessment requires validated patient-reported outcome measures.
  • The original Symptom Inventory (SI) is a 29-item measure of MS symptoms.
  • Disability-specific short forms of the SI aim to improve assessment across different MS disability levels.

Purpose of the Study:

  • To evaluate the construct validity and reliability of new disability-specific short forms of the Symptom Inventory for multiple sclerosis (MS).
  • To compare the psychometric properties of the new SI short forms with the original 1999 SI.
  • To establish interpretation metrics for the new SI short forms to aid future research sample size calculations.

Main Methods:

  • A web-based longitudinal study involving 1142 participants from the North American Research Committee on Multiple Sclerosis Registry.
  • Data collected at baseline and 6 months, assessing correlations with other MS outcome measures.
  • Responsiveness evaluated using transition scores and standardized response means; interpretation guidelines derived from effect sizes and crosswalks.

Main Results:

  • The new disability-specific SI short forms demonstrated good psychometric performance, comparable to the original SI, with slightly improved reliability.
  • These forms showed moderate responsiveness to clinically important changes, particularly in patients with mild to moderate MS disability.
  • Effect sizes indicated greater utility for detecting symptom improvement, especially in mild/moderate disability groups.

Conclusions:

  • The Symptom Inventory, particularly its new disability-specific short forms, is valuable for understanding the patient experience in MS.
  • The utility of the SI varies across and within different MS disability levels.
  • Further research directions are proposed to optimize the use of the SI in MS clinical studies.