CAMBRIDGE, Mass.--(BUSINESS WIRE)--Dyax Corp. (NASDAQ:DYAX) today announced a study published evaluating the Company’s novel Patient Reported Outcome Measures (PROs) used to assess hereditary angioedema (HAE) attacks affirmed the PROs as valuable instruments in capturing HAE symptom severity and impact of treatment. The study, “Psychometric Validation of Two Patient-Reported Outcome Measures to Assess Symptom Severity and Changes in Symptoms in Hereditary Angioedema,” examined the PROs used in Dyax’s HAE clinical development program and was published in the September issue of the journal Quality of Life Research.