The Pennsylvania hemophilia program 1973-1978.

Area of Science:

• Hematology
• Genetics
• Public Health

Background:

• Hemophilia is a rare bleeding disorder affecting males, with prevalence varying by geographic location.
• Understanding the epidemiology and clinical characteristics of hemophilia is crucial for effective patient management and resource allocation.

Purpose of the Study:

• To describe the prevalence, demographics, clinical severity, treatment patterns, and outcomes of hemophilia patients in Pennsylvania.
• To provide insights into the burden of hemophilia, including bleeding episodes, treatment costs, and complications.

Main Methods:

• Retrospective analysis of hemophilia patient data in Pennsylvania.
• Data collection included prevalence, age, factor deficiency type, factor levels, clinical severity, treatment frequency, bleeding types, home therapy usage, and adverse events.

Main Results:

• Prevalence of hemophilia in Pennsylvania is 1:10,000 males, with Factor VIII deficiency being five times more common than Factor IX.
• 55% of Factor VIII-deficient patients and 45% of Factor IX-deficient patients have severe disease, requiring frequent treatment (18 vs. 10 times/year).
• Hemarthroses are the most common bleeding type (70%), and home therapy accounts for 60% of Factor VIII concentrate usage.

Conclusions:

• Hemophilia in Pennsylvania presents with a significant burden of severe disease, particularly Factor VIII deficiency.
• Effective management, including home therapy, is essential to minimize bleeding episodes and associated healthcare utilization.
• While adverse reactions are infrequent, persistence of hepatitis B virus and inhibitors remain concerns, necessitating ongoing monitoring.