Table 5: The risk factors and prothrombotic risk factors of patients who received prophylaxis.

Risk FactorsCholesterolTriglycerideHigh-CRPFibrinogenHomocysteineLipoprotein AFactor VIIIFactor IXProtein SProtein CAntithrombin IIIAPCRFactor V LeidenMTHFRProthrombin 20210Total

Protein S deficiency 1 1 3 1 3
Congenital heart disease 3 1 3 2 3 1 15
Moyamoya disease 1 11
Undergone varicella 1 11
Cyclosporin toxicity 11
Rheumatic heart disease1
Thalassemia major- BMT° 1 11
other 1 2 1 2 1 1 2 34

Total17

One of the patients had heterozygous factor V Leiden mutation, one had MTHFR homozygote mutation, one had antiphospholipid antibody syndrome, and the other patient had megaloblastic anemia with MTHFR heterozygote mutation. °bone marrow transplantation.