Thromb Haemost 1994; 71(01): 015-018
DOI: 10.1055/s-0038-1642378
Review Article
Schattauer GmbH Stuttgart

Different Incidence of Venous Thrombosis in Patients with Inherited Deficiencies of Antithrombin III, Protein C and Protein S

G Finazzi
The Divisione di Ematologia e Centro Emostasi e Trombosi, Ospedali Riuniti, Bergamo, Italy
,
T Barbui
The Divisione di Ematologia e Centro Emostasi e Trombosi, Ospedali Riuniti, Bergamo, Italy
› Author Affiliations
Further Information

Publication History

Received: 04 May 1993

Accepted after revision 04 October 1993

Publication Date:
12 July 2018 (online)

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Summary

A cohort study was undertaken to compare the incidence of thrombosis in patients with inherited deficiency of Antithrombin III (n = 9), Protein C (n = 36) and Protein S (n = 36). The patients were stratified for schedule of antithrombotic prophylaxis and followed for a total period of 160 patient-years. Seven venous thrombosis were observed for a total incidence of 4.3% pts.-ys. The incidence of thrombosis was not significantly different in patients of different age, sex and schedule of prophylaxis, although there was a trend to a lower incidence in young individuals and in those receiving long-term oral anticoagulation. Patients with AT III deficiency had an higher incidence of thrombosis than patients with Protein C or Protein S deficiency (12 vs. 2.8 vs. 3.3% pts.-ys., p <0.05), despite the fact that they were, on average, younger and more prophylaxed. This study suggests that congenital Antithrombin III deficiency constitutes a greater risk of thrombosis than congenital deficiences of Protein C and Protein S.