[Home-based infusion therapy--a feasible approach for chronically ill patients? A new path to provide superior patient care exemplified for Fabry's disease]

A systematic literature review on the health-related quality of life and economic burden of Fabry disease

BACKGROUND

Fabry disease (FD) is a rare lysosomal storage disease associated with glycolipid accumulation that impacts multiple physiological systems. We conducted a systematic literature review (SLR) to characterize the humanistic (quality of life [QoL]) and economic burden of FD.

METHODS

Searches were conducted in the Embase, MEDLINE®, and MEDLINE® In-Process databases from inception to January 19, 2022. Conference abstracts of specified congresses were manually searched. Additional searches were performed in the Cochrane and ProQuest databases for the humanistic SLR and the National Health Service Economic Evaluations Database for the economic SLR. Studies of patients with FD of any sex, race, and age, and published in the English language were included. There was no restriction on intervention or comparator. For the humanistic SLR, studies that reported utility data, database/registry-based studies, questionnaires/surveys, and cohort studies were included. For the economic SLR, studies reporting economic evaluations or assessing the cost of illness and resource use were included.

RESULTS

Of the 1363 records identified in the humanistic search, 36 studies were included. The most commonly used QoL assessments were the 36-item Short-Form Health Survey (n = 16), EQ-5D questionnaire descriptive system or visual analog scale (n = 9), and the Brief Pain Inventory (n = 8). Reduced QoL was reported in patients with FD compared with healthy populations across multiple domains, including pain, physical functioning, and depressive symptoms. Multiple variables-including sex, age, disease severity, and treatment status-impacted QoL. Of the 711 records identified in the economic burden search, 18 studies were included. FD was associated with high cost and healthcare resource use. Contributors to the cost burden included enzyme replacement therapy, healthcare, and social care. In the seven studies that reported health utility values, lower utility scores were generally associated with more complications (including cardiac, renal, and cerebrovascular morbidities) and with classical disease in males.

CONCLUSION

FD remains associated with a high cost and healthcare resource use burden, and reduced QoL compared with healthy populations. Integrating information from QoL and economic assessments may help to identify interventions that are likely to be of most value to patients with FD.

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.

Considerations for Home-Based Treatment of Fabry Disease in Poland during the COVID-19 Pandemic and Beyond

Current therapy for Anderson–Fabry disease in Poland includes hospital or clinic-based intravenous enzyme replacement therapy with recombinant agalsidase alpha or beta, or oral pharmacological chaperone therapy with migalastat. Some countries around the world offer such treatment to patients in the comfort of their own homes. The 2020–2021 COVID-19 pandemic has pushed global healthcare providers to evolve their services so as to minimize the risk of COVID-19 exposure to both patients and providers; this has led to advances in telemedicine services and the increasing availability of at-home treatment for various procedures including parenteral drug administration. A total of 80% of surveyed Anderson–Fabry disease patients in Poland would prefer home-based treatment, which would be a safe and convenient alternative to clinic-based treatment if patient selection is based on our proposed algorithm. Our recommendations for home-based treatments appear feasible for the long term care of Anderson–Fabry disease patients during the COVID-19 pandemic and beyond. This may also serve as a basis for home-based treatment programs in other rare and ultra-rare genetic diseases.

[Home infusion therapy for Pompe disease: Recommendations for German-speaking countries]

BACKGROUND

Pompe disease is a lysosomal multisystem disorder with predominant proximal myopathy. Treatment with enzyme replacement therapy (ERT) is available requiring life-long biweekly infusions of recombinant α-glucosidase. To minimize the burden of ERT patients ask for home infusion therapy.

AIMS AND METHODS

Pompe disease experts from Germany, Austria, and Switzerland discussed in two consensus meetings in 2019 and 2020 requirements for home infusion therapy, adequate execution of treatment, and the legal situation for delegating physicians.

RESULTS AND DISCUSSION

Home infusion therapy is principally feasible for patients with Pompe disease if certain preconditions are fulfilled, but the decision to implement has to be made on an individual basis. The treating physician delegates the execution of ERT ad personam to nursing staff but retains full legal responsibility. Home infusion therapy has to be carried out by specially trained and qualified staff. Infusion-related risks comprise mainly allergic reactions, and adequate medical treatment must be warranted. In German-speaking countries, clear rules for conducting home infusion therapy are needed to reduce psychosocial stress for patients with Pompe disease, and providing legal certainty for delegating physicians.

Quality of life in patients with Fabry disease: a systematic review of the literature

Fabry disease (FD), caused by deficiency of the lysosomal enzyme α-galactosidase-A, is a progressive multisystem disease. The disease is X-linked with generally more severe manifestations in males, but can impact on quality of life (QoL) of both male and female patients. The purpose of this literature review is to analyse the currently available data concerning QoL measurement, specifically which questionnaires have been used to measure QoL, how patients with FD score compared to the general population, and the effects of enzyme replacement therapy (ERT) on QoL. Fifty-four articles were relevant for this literature review. Patients with FD had a lower QoL compared to the general population. No definite conclusions could be drawn from the studies on the effect of ERT on QoL; natural history data is scarce, changes observed were limited and the cohorts were of small size. We propose that a FD specific questionnaire be made to accurately assess QoL in patients with FD.