Patient-reported burden of myasthenia gravis: baseline results of the international prospective, observational, longitudinal real-world digital study MyRealWorld-MG

Sarah Dewilde*, Glenn Philips, Sandra Paci, Jon Beauchamp, Silvia Chiroli, Casey Quinn, Laura Day, Mark Larkin, Jacqueline Palace, Sonia Berrih-Aknin, Kristl G. Claeys, Srikanth Muppidi, Renato Mantegazza, Francesco Saccà, Andreas Meisel, Guillaume Bassez, Hiroyuki Murai, M. F. Janssen

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

6 Citations (Scopus)
26 Downloads (Pure)


Objectives Myasthenia gravis (MG) is a rare, chronic, autoimmune neuromuscular disease which can affect functional and mental aspects of health and health-related quality of life (HRQoL). This study aims to obtain detailed knowledge of the impact of MG on HRQoL in a broad population from the perspective of the patient. Design Prospective, observational, digital, longitudinal real-world study. Setting Adult patients with MG from seven countries (USA, Japan, Germany, UK, Italy, Spain and Canada) downloaded a mobile application onto their phones and entered data about themselves and their MG. Outcome measures Data was collected using the following general and disease-specific patient-reported outcome measurements: EuroQol 5 Domains Health-Related Quality of Life Questionnaire (EQ-5D-5L), Myasthenia Gravis Activities of Daily Living (MG-ADL), Myasthenia Gravis Quality of Life 15-item revised scale (MG-QoL-15r), Hospital Anxiety and Depression Scale (HADS) and Health Utilities Index III (HUI3). Patients were categorised by their self-assessed Myasthenia Gravis Foundation of America (MGFA) class (I-V). Results Baseline results of 841 participants (mean age 47 years, 70% women) are reported. The distribution across the MGFA classes was: 13.9%, 31.0%, 38.1%, 15.5% and 1.6% for classes I-V. The MGFA class was a strong predictor of all aspects of HRQoL, measured with disease-specific and with generic instruments. The domains in which patients with MG most frequently mentioned problems were usual activities, anxiety and depression, tiredness, breathing and vision. The mean total MG-ADL Score was positively associated with increasing MGFA classes: 2.7, 4.4, 6.3 and 8.4 for MGFA classes I-IV. Mean baseline EQ-5D-5L utility was also associated with MGFA classes and was 0.817, 0.766, 0.648 and 0.530 for MGFA class I-IV. Conclusions MG has a large impact on key aspects of health and HRQoL. The impact of this disease increases substantially with increasing disease severity.

Original languageEnglish
Article numbere066445
JournalBMJ Open
Issue number1
Publication statusPublished - 31 Jan 2023

Bibliographical note

Funding Information:
The study is funded by argenx BV, Ghent, Belgium. No grant or award is applicable.

Publisher Copyright:
© 2023 Author(s). Published by BMJ.


Dive into the research topics of 'Patient-reported burden of myasthenia gravis: baseline results of the international prospective, observational, longitudinal real-world digital study MyRealWorld-MG'. Together they form a unique fingerprint.

Cite this