Qualitative study of fatigue in adults with primary mitochondrial disease : Development of the PROMIS Fatigue Mitochondrial Disease Short Form
Background: Fatigue is a debilitating symptom in patients with primary mitochondrial disease nPMD). Developing new treatments that improve fatigue is a patient priority but is hampered by a lack of fit-for-purpose patient-reported outcome measures (PROMs). We aimed to understand the impact of fatigue on the lives of people with PMD and develop a brief PMD-specific PROM to evaluate fatigue in clini