The survey is intended to investigate the following matters, etc. under the actual use status after marketing in all patients who are administered this drug for a certain period of time after the launch. 1. Occurrence status of adverse events 2. Factors that may influence the safety 3. Efficacy In addition, the following occurrence statuses will be investigated as priority items of the survey: Incidence rate of inhibitor, reduction in drug, efficacy, Allergic reaction, and Thrombosis.
Patients with hemophilia B (congenital blood coagulation factor IX deficiency) who are administered this drug. Patients with hemophilia B are either patients for whom treatment was already started with a blood coagulation factor IX product ("Previously treated patients": hereinafter, "PTPs") or patients who have no history of treatment with a blood coagulation factor IX product in the past and for whom treatment will be started with this drug for the first time ("Previously untreated patients": hereinafter, "PUPs"). The definition of PUPs in this survey is "Patients in whom the total number of days of administration of a blood coagulation factor IX product other than this drug before administration of this drug was 3 exposure days (actual number of days of administration: hereinafter, "EDs") or less."
Study Type
OBSERVATIONAL
Enrollment
314
Patients with hemophilia B (congenital blood coagulation factor IX deficiency) who are administered this drug. Patients with hemophilia B are either patients for whom treatment was already started with a blood coagulation factor IX product ("Previously treated patients": hereinafter, "PTPs") or patients who have no history of treatment with a blood coagulation factor IX product in the past and for whom treatment will be started with this drug for the first time ("Previously untreated patients": hereinafter, "PUPs"). The definition of PUPs in this survey is "Patients in whom the total number of days of administration of a blood coagulation factor IX product other than this drug before administration of this drug was 3 exposure days (actual number of days of administration: hereinafter, "EDs") or less."
Tokyo Medical University Hospital
Shinjuku-ku, Tokyo, Japan
Number of Bleeding Episodes (Annual Bleeding Event Rate) During Periodic Replacement Therapy
Annual bleeding rate (ABR) was calculated as the number of total bleeding events occured during prophylaxis period devided by the period (events/year). ABR for other replacement treatment period was also calculated to evaluate the differences between types of treatment. If the period used for ABR calculation was less or equal than 7 days, the relevant data was regarded as missing.
Time frame: 2 years for PTPs, 1 year for PUPs
Number of Administrations Required for Hemostasis for Bleeding Events
Mean number of administrations for hemostasis in replacement therapy for bleeding events.
Time frame: 2 years for PTPs, 1 year for PUPs
Subjective Evaluation of Each Therapeutic Administration for Bleeding Episodes
Propotion of subjects whose physicians evaluated the effect of BeneFIX for bleeding episodes as excellent or good was calculated.
Time frame: 2 years for PTPs, 1 year for PUPs
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