Article Text
Abstract
Background Porphyrias, as most rare diseases, are characterized by complexity and scarcity of knowledge, particularly symptom burden and quality of life. The German Porphyria Registry (PoReGer) was set up to close this gap nationally. Here we present the results of our first evaluation on patient reported outcome measures on Fatigue.
Methods PoReGer was founded in 2023 by four German centers with longstanding porphyria expertise. In a specified data matrix for three subgroups [acute (AP), chronic blistering cutaneous (CBC), acute non-blistering cutaneous (ANC)] data on demographics, symptoms, clinical course and history, follow-up assessments, therapies, and life circumstances are collected longitudinally, at least once a year. Ethics approval and patient´s informed consent were obtained. Enrollment into the registry started in August 2023. To evaluate fatigue the Fatigue-assessment-scale (FAS) questionnaire was used, categorizing patients in 3 different groups (no fatigue, substantial fatigue and extreme fatigue) depending on their answers to 10 Likert-scaled questions.
Results Until May 2024, 23 patients were included, 14 with APs (13 acute intermittent porphyrias, 1 variegate porphyria), 9 with CBCs (all Porphyria cutanea tarda) and 1 with an ANC. In APs median age at inclusion in registry was 40 years; while median age at diagnosis was 27 years. 13 (93%) were female and 6 (43%) reported comorbidities. Median (IQR) total score of the FAS questionnaire was 23 (20;36) in the AP group, with 5 (36%) patients in the category no fatigue, 4 patients (29%) with substantial fatigue and 4 patients (29%) with extreme fatigue. In CBCs median age at inclusion in registry was 64 years; while median age at diagnosis was 59 years. 7 (78%) were female and 7 (78%) reported comorbidities. In the CBC group 4 (44%) patients were categorized with no fatigue and 4 (44%) patients with substantial fatigue. [More patients from all groups and also an analysis of the ‘AP treated with Givosiran’ subgroup are expected until September 2024]
Conclusions This analysis showed fatigue being a relevant comorbidity in patients with different forms of porphyrias. Patients with APs seem to be affected more than patients with CBCs with a third of patients with AP reporting extreme fatigue. With more patients being included in the registry further longitudinal data on fatigue and influencing factors will be gained.
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