Overcoming treatment implementation barriers for individuals with rare diseases using single-case experimental...

Area of Science:

• Medical research methodology
• Rare disease clinical trials

Background:

• Conventional treatment evaluation methods are inadequate for rare diseases due to small patient numbers.
• Legislation often mandates standard trial rules for rare disease therapies, posing challenges.

Purpose of the Study:

• To explore the utility and challenges of single-case experimental designs (SCEDs) in rare disease research.
• To present lessons learned from real-world SCED implementation in rare diseases.
• To introduce a manual for conducting SCEDs to enhance evidence generation and treatment accessibility.

Main Methods:

• Discussion of real-world experiences from clinicians, researchers, and participants in SCEDs for rare diseases.
• Evaluation by an expert group.
• Development of a practical manual for conducting SCEDs.

Main Results:

• SCEDs, including n-of-1 trials, provide a viable approach for individualized rare disease treatment assessment.
• Key challenges in SCEDs for rare diseases include heterogeneity, outcome measure selection, and logistical/regulatory hurdles.
• A comprehensive manual has been developed based on practical experiences and expert review.

Conclusions:

• SCEDs are a promising methodology for rare disease research, offering individualized evidence and improving treatment relevance.
• Addressing the identified challenges is crucial for successful SCED implementation.
• The developed manual serves as a guide to facilitate robust evidence generation and improve access to therapies for rare disease patients.