Retrospective analysis of hemophilia B in Turkey: identifying main characteristics and treatment options.

Background: Hemophilia B (HB), an X-linked recessive inherited bleeding disorder, exhibits a high prevalence among males.

Objectives: To present the first national cohort of persons with HB to define the demographics, clinical characteristics, and treatment patterns in Turkey.

Methods: This multicenter, retrospective study included 433 alive persons with HB registered in 35 centers between 1961 and 2018.