The patients` perspective on home-based infusion: A longitudinal observational study in the German healthcare setting for patients with lysosomal storage disorders treated with enzyme replacement therapy.

Background: Lysosomal storage diseases (LSDs), metabolic disorders resulting in build-up of endogenous waste and progressive organ damage, can be treated with intravenous enzyme replacement therapy (ERT). ERT can be administered either in specialized clinics, at a physician's office or in the home care setting. Legislative goals in Germany strive to shift to more outpatient care while maintaining treatment objectives. This study investigates the patient perspective on home-based ERT in terms of acceptance, safety, and treatment satisfaction in LSD patients. Methods: This was a longitudinal observational study, carried out under real-world conditions in patients' home environment, covering 30 months from January 2019 to June 2021. Patients with LSDs who were deemed suitable for home-based ERT by their physicians were recruited to the study. Patients were interviewed before the start of the first home-based ERT and then at regular intervals thereafter using standardized questionnaires. Results: Data from 30 patients were analyzed: 18 with Fabry disease, 5 with Gaucher disease, 6 with Pompe disease and 1 with Mucopolysaccharidosis type I (MPS I). Age ranged from 8 to 77 years (mean age 40). The reported average waiting time prior to infusion of more than half an hour decreased from 30% of the patients affected at baseline to 5% across all follow-up time points. All patients felt adequately informed about home-based ERT throughout follow-ups and reported that they would choose home-based ERT again. At almost each time point, patients indicated that home-based ERT had improved their ability to cope with the disease. All but one patient indicated feeling safe at each follow-up time point. Compared to 36.7% at baseline, only 6.9% of patients reported a need for improvement in their care after 6 months of home-based ERT. Mean treatment satisfaction increased by approximately 1.6 scale points after 6 months of home-based ERT compared to baseline, and by another 0.2 scale points after 18 months. In terms of quality of care, all but one patient rated home-based ERT as an equivalent alternative throughout follow-ups. Patients would recommend home-based ERT to other suitable LSD-patients. Conclusion: Home-based ERT increases patients' treatment satisfaction, and patients perceive the quality of care as an equivalent alternative, compared to ERT in a center, clinic, or at a physician's office.