Clinical Trials and PROs: What Patients with Rare Diseases Say
Clinical Trials and PROs: What Patients with Rare Diseases Say By Kathleen Hoffman, PhD MSPH Challenges to developing clinical trials for rare diseases begin with their rarity – each condition affects fewer than 200,000 Americans. Approximately seventy-five percent of those affected by rare diseases are children. It is estimated that 80 percent of rare diseases are caused by genetic changes. Many rare diseases are progressive and debilitating. One third of the children affected by these conditions do not reach 5 years of age.1 Getting to a rare disease diagnosis can take years. In a way, it [...]