Abstract
A study was made by the Hemophilia Center Directors of the United Kingdom and Northern Ireland. From 1969-1974, 2600 patients with hemophilia A and 388 with hemophilia B attended Hemophilia Centers for treatment. Of these patients, 71 died in the survey period. A record is presented of the amounts and types of therapeutic materials used each year during this time. The incidence of jaundice and anti-factor VIII and anti-factor IX antibodies was recorded.