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Haemophilia: are there different types?

Yes. Each 'type' refers to the lack of a specific clotting factor.

Factors VIII and IX are the most common deficiencies, however others do exist.

Factor VIII deficiency is known as Haemophilia A while Haemophilia B refers to deficiency of Factor IX.

Haemophilia can be mild, moderate or severe, depending on the degree of the deficiency (i.e. how much factor is missing).

  • Mild haemophilia: 5-25 per cent factor VIII or IX activity.
  • Moderate haemophilia: 1-5 per cent factor VIII or IX activity.
  • Severe haemophilia: less than 1 per cent factor VIII or IX activity.

 


 

myDr, 2000. Reproduced with kind permission from the Haemophilia Foundation Australia.
©Copyright: myDr, UBM Medica Australia, 2000-2012. All rights reserved.


Last Reviewed: 24 May 2007

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