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Psychometric evaluation of the myasthenia gravis composite using Rasch analysis.

Publication ,  Journal Article
Sadjadi, R; Conaway, M; Cutter, G; Sanders, DB; Burns, TM; MG Composite MG-QOL15 Study Group,
Published in: Muscle Nerve
June 2012

INTRODUCTION: The MG Composite (MGC) is a validated outcome measure of the clinical manifestations of myasthenia gravis. METHODS: We performed Rasch analyses of the MGC to investigate additional properties, including its unidimensionality and the appropriateness of the weights assigned to the response categories for the MGC items. RESULTS: The fit statistics indicated that the 10 items belong together and can be summated for a total score. There was an overall absence of item order distortion between response categories. The Rasch model's expected category response values were compatible with item weights previously assigned. CONCLUSIONS: Our analysis suggests that: (1) the score can be summated to estimate an overall disease severity score; (2) the response options of the 10 items are not significantly distorted; and (3) the assigned weights of the response options are appropriate.

Duke Scholars

Published In

Muscle Nerve

DOI

EISSN

1097-4598

Publication Date

June 2012

Volume

45

Issue

6

Start / End Page

820 / 825

Location

United States

Related Subject Headings

  • Severity of Illness Index
  • Retrospective Studies
  • Psychometrics
  • Outcome Assessment, Health Care
  • Neurology & Neurosurgery
  • Myasthenia Gravis
  • Middle Aged
  • Male
  • Humans
  • Female
 

Citation

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Sadjadi, R., Conaway, M., Cutter, G., Sanders, D. B., Burns, T. M., & MG Composite MG-QOL15 Study Group, . (2012). Psychometric evaluation of the myasthenia gravis composite using Rasch analysis. Muscle Nerve, 45(6), 820–825. https://doi.org/10.1002/mus.23260
Sadjadi, Reza, Mark Conaway, Gary Cutter, Donald B. Sanders, Ted M. Burns, and Ted M. MG Composite MG-QOL15 Study Group. “Psychometric evaluation of the myasthenia gravis composite using Rasch analysis.Muscle Nerve 45, no. 6 (June 2012): 820–25. https://doi.org/10.1002/mus.23260.
Sadjadi R, Conaway M, Cutter G, Sanders DB, Burns TM, MG Composite MG-QOL15 Study Group. Psychometric evaluation of the myasthenia gravis composite using Rasch analysis. Muscle Nerve. 2012 Jun;45(6):820–5.
Sadjadi, Reza, et al. “Psychometric evaluation of the myasthenia gravis composite using Rasch analysis.Muscle Nerve, vol. 45, no. 6, June 2012, pp. 820–25. Pubmed, doi:10.1002/mus.23260.
Sadjadi R, Conaway M, Cutter G, Sanders DB, Burns TM, MG Composite MG-QOL15 Study Group. Psychometric evaluation of the myasthenia gravis composite using Rasch analysis. Muscle Nerve. 2012 Jun;45(6):820–825.
Journal cover image

Published In

Muscle Nerve

DOI

EISSN

1097-4598

Publication Date

June 2012

Volume

45

Issue

6

Start / End Page

820 / 825

Location

United States

Related Subject Headings

  • Severity of Illness Index
  • Retrospective Studies
  • Psychometrics
  • Outcome Assessment, Health Care
  • Neurology & Neurosurgery
  • Myasthenia Gravis
  • Middle Aged
  • Male
  • Humans
  • Female