Cost-Effectiveness of Hospital-at-Home and Fecal Microbiota Transplantation in Treating Older Patients With Clostridioides difficile

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BACKGROUND: Clostridioides difficile infection (CDI) primarily affects older patients with comorbid conditions and has a high mortality rate. Fecal microbiota transplantation (FMT) is effective and cost-effective for CDI. In a recent study, we demonstrated the clinical benefits of combining hospital-at-home care with FMT for older patients with CDI, but its cost-effectiveness remains unknown. The current study aimed to evaluate the cost-effectiveness of the intervention in patients aged ≥70 years with CDI, compared with standard treatment. METHODS: The cost-utility analysis was conducted using data from a randomized clinical trial enrolling 217 patients, assessing the cost-effectiveness of the intervention over 90 days. Resource use was assessed from a healthcare sector perspective. Missing data were handled with proxy replacement and multiple imputation. Sensitivity analyses included probabilistic analysis, complete case analysis, adjustment of key unit prices, and a hospital perspective. A willingness-to-pay threshold was set to €22 994 or $24 863 per quality-adjusted life year (QALY). RESULTS: In the base case analysis, the intervention was dominant, with mean cost savings of €2556 ($2764) and a mean gain of 0.004 QALY. Although resource use was higher, the intervention resulted in an average reduction of 6 hospital admission days per patient and increased odds of clinical resolution. The results remained robust across different perspectives, the exclusion of patients with missing data, and variations in hospital admission costs. CONCLUSIONS: In patients aged ≥70 years with CDI, an intervention combining hospital-at-home care and FMT is cost-effective compared with standard treatment. The cost-effectiveness is mainly driven by fewer hospital admission days.

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