A Study to Evaluate the Impact of Efgartigimod on Overall Disease Experience of People Suffering From Generalized Myasthenia Gravis (gMG) in Italy

The Myasthenia Gravis Activities of Living (MG-ADL) scale is an 8-item patient-reported scale that measures MG symptoms and functional status across 4 domains. The total score ranges from 0 to 24, with higher scores indicating greater disability.

Minimal Symptom Expression (MSE) is defined as an MG-ADL score ≤ 1

The quantitative myasthenia gravis (QMG) score is a commonly used scale for evaluating muscle weakness associated with myasthenia gravis. It consists in a 13-item direct physician assessment scoring system that quantifies disease severity, based on impairments of body functions and structures. The total QMG score ranges from 0 to 39, where higher scores indicated greater disease severity.

The PROMIS Fatigue Short Form 4a is a four-item questionnaire used to assess the experience of fatigue over the past seven days. The items are designed to capture different aspects of fatigue, including the impact of fatigue on physical and mental activities. The raw score can range from 4 to 20, with higher scores indicating more severe fatigue.

The Fatigue Severity Scale (FSS) is a self-administered questionnaire with 9 items (questions) investigating the severity of fatigue in different situations during the past week. The final score ranges from 1 to 7.

The Hospital Anxiety and Depression Scale (HADS) is a widely used screening tool that helps to identify possible or probable instances of anxiety and depression among patients in non-psychiatric hospital settings. It consists of 14 items, with 7 items related to anxiety (HADS-A) and 7 related to depression (HADS-D), collecting how the patient was feeling in the previous week. The score for each subscale ranges from 0 to 21.

The Hospital Anxiety and Depression Scale (HADS) is a widely used screening tool that helps to identify possible or probable instances of anxiety and depression among patients in non-psychiatric hospital settings. It consists of 14 items, with 7 items related to anxiety (HADS-A) and 7 related to depression (HADS-D), collecting how the patient was feeling in the previous week. The score for each subscale ranges from 0 to 21.

The Pittsburgh Sleep Quality Index (PSQI) is a self-rated questionnaire which assesses sleep quality and disturbances over a 1-month time interval. Nineteen individual items generate seven "component" scores: subjective sleep quality, sleep latency, sleep duration, habitual sleep efficiency, sleep disturbances, use of sleeping medication, and daytime dysfunction. The sum of scores for these seven components yields one global score, ranging from 0 to 21, with higher scores indicating worse sleep quality.

The Treatment Assessment in Dual Evaluation Model (TANDEM) - patient version is a non-validated, exploratory PRO designed to assess patient satisfaction with efgartigimod alfa treatment and symptom control in MG. It includes 8 items on therapeutic alignment, treatment experience, and symptom management.

The Treatment Assessment in Dual Evaluation Model (TANDEM) - clinician version is a non-validated, exploratory PRO designed to assess clinician satisfaction with the management of efgartigimod alfa treatment and symptom control in patients with MG. It includes 8 items on therapeutic personalization, treatment effectiveness, and symptom stability.

The Caregiver Burden Inventory (CBI) is a 24-item questionnaire designed to assess the following different aspects of caregiver burden. Scores range from 0 to 96, with higher scores indicating greater feelings of burden.