Abstract

Background

There have been numerous classification systems to diagnose corresponding myositis subtypes and select appropriate therapeutic measures. However, the lack of a broad consensus on diagnostic criteria has led to clinical uncertainties. The objective of this study was to compare two commonly used dermatomyositis-classification systems regarding their clinical practicability and to point out their specific advantages and disadvantages.

Methods

This study included 30 patients diagnosed with dermatomyositis at the Charité university hospital, Berlin, Germany from 2010 to 2017. Patient files with complete data and defined historical classifications were enrolled and ENMC (2003) and EULAR/ACR (2017) criteria retrospectively applied.

Results

According to the ENMC approach, 14 patients were classified as "definite" and 12 as "probable" dermatomyositis. One patient exhibited an "amyopathic dermatomyositis" and three a "DM without dermatitis". Regarding the criteria probability of the EULAR/ACR set, 16 patients had a "high", 13 a "medium" and one a "low probability". There was a significant difference (p = 0.004) between the subclasses of the ENMC in relation to the EULAR/ACR score. The agreement between the classification probabilities of "definite/high" (κ = 0.400) and "possible/medium" (κ = 0.324) was fair.

Conclusions

It is important to find a consensus among the medical disciplines involved and to establish a structured procedure. Future studies with newer approaches are warranted to conclusively decide which system to use for the physician.

Details

Title
Performance of ENMC and EULAR/ACR classification systems applied to a single tertiary center cohort of dermatomyositis patients
Author
Zoske Jan 1 ; Schneider, Udo 2 ; Siegert Elise 3 ; Kleefeld Felix 4 ; Preuße Corinna 5 ; Stenzel, Werner 5 ; Hahn, Katrin 4 

 Humboldt-Universität Zu Berlin, and Berlin Institute of Health, Department of Periodontology, Oral Medicine and Oral Surgery, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Berlin, Germany (GRID:grid.7468.d) (ISNI:0000 0001 2248 7639) 
 Charité – Universitätsmedizin Berlin, Department of Rheumatology and Clinical Immunology, Berlin, Germany (GRID:grid.6363.0) (ISNI:0000 0001 2218 4662) 
 Charité – Universitätsmedizin Berlin, Department of Rheumatology and Clinical Immunology, Berlin, Germany (GRID:grid.6363.0) (ISNI:0000 0001 2218 4662); Berlin Institute of Health (BIH), Berlin, Germany (GRID:grid.484013.a) 
 Charité - Universitätsmedizin Berlin, Department of Neurology, Berlin, Germany (GRID:grid.6363.0) (ISNI:0000 0001 2218 4662) 
 Humboldt-Universität Zu Berlin, and Berlin Institute of Health (BIH), Department of Neuropathology, Charité - Universitätsmedizin, Corporate Member of Freie Universität Berlin, Berlin, Germany (GRID:grid.7468.d) (ISNI:0000 0001 2248 7639) 
Publication year
2021
Publication date
Jan 2021
Publisher
Springer Nature B.V.
e-ISSN
25243489
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2597364099
Copyright
© The Author(s) 2021. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.