About this Medicine article

Functional Index-3: A Valid and Reliable Functional Outcome Assessment Measure in Patients With Dermatomyositis and Polymyositis by Floranne C. Ernste; Christopher Chong; Cynthia S. Crowson; Tanaz A. Kermani; Orla Ni Mhuircheartaigh; Helene Alexanderson is a Medicine article available to read on EtoBox.

Objective. Patients with dermatomyositis (DM) and polymyositis (PM) have reduced muscle endurance. The aim of this study was to streamline the Functional Index-2 (FI-2) by developing the Functional Index-3 (FI-3) and to evaluate its measurement properties, content and construct validity, intra-and inter-rater reliability. ## Methods. A data set of the previously performed and validated FI-2 (n=63) was analyzed for internal redundancy, floor and ceiling effects. The content of the FI-2 was revised into the FI-3. Construct validity and intra-rater reliability of FI-3 were tested on 43 DM and PM patients at two rheumatology centers. Inter-rater reliability was tested in 25 patients. The construct validity was compared with the Myositis Activities Profile (MAP), Health Assessment Questionnaire (HAQ), and Borg CR-10 using Spearman's correlation coefficient. Results. Spearman's correlation coefficients of 63 patients performing FI-3 revealed moderate to high correlations between shoulder flexion and hip flexion tasks and similar correlations with MAP and HAQ scores; there were lower correlations for neck flexion task. All FI-3 tasks had very low to moderate correlations with the Borg sca

Author

Floranne C. Ernste; Christopher Chong; Cynthia S. Crowson; Tanaz A. Kermani; Orla Ni Mhuircheartaigh; Helene Alexanderson

Publisher

Journal of Rheumatology Publishing Company; The Journal of Rheumatology; Journal of Rheumatology Publishing Co., Ltd. (ISSN 0315-162X)

Published

2020

Language

EN

Field

Medicine (Health Sciences)