Epidemiology of aplastic anemia: A prospective multicenter study

Eva Montané, Luisa Ibáñez, Xavier Vidal, Elena Ballarín, Ramon Puig, Nuria García, Joan Ramon Laporte, Antoni Julià, Salut Brunet, Ramón Ayats, Carles Besses, Encarnación Pérez Vila, Alba Bosch, Alicia Domingo, Esther Alonso, Esmeralda De La Banda, Javier Estella, Teresa Toll, Marta García, Ramón LópezFuensanta Millà, Tomás Navarro, Benet Nomdedeu, Jordi Esteve, Teresa Olivé, Joan Peris, Antoni Pineda, Imma Roig, Alfons Soler, Rafael Soto, Isabel De Diego

Research output: Contribution to journalArticleResearchpeer-review

111 Citations (Scopus)

Abstract

Background: Aplastic anemia is a rare and severe disease. Its incidence varies considerably worldwide. We aimed at describing the epidemiology of this disease, including the incidence, mortality and survival trends, in a well-defined population. Design and Methods: Since 1980, a case-control surveillance study of aplastic anemia has been carried out by a cooperative group, in the metropolitan area of Barcelona. Inclusion is dependent on the patient having at least two of the following features: white blood cell count ≤3.5×109/L, platelet count ≤50×109/L, hemoglobin <10 g/L or hematocrit of <30%; when only one of these last two criteria is fulfilled, a reticulocyte count of ≤30×109/L is also required. The bone marrow biopsy has to be compatible with the diagnosis of aplastic anemia. Results: Between 1980 and 2003, a total of 235 cases of aplastic anemia were identified. The overall incidence was 2.34 per million inhabitants per year and the incidence increased with age. Most of the cases were classified as severe or very severe aplastic anemia. Survival rates at 3 months, and at 2 and 15 years after the diagnosis were 73%, 57%, and 51%, respectively. Advanced age and more severe disese at the time of diagnosis were associated with a lower survival rate. There was a trend to a better 2-year survival rate among patients treated with bone marrow transplantation. Forty-nine cases (20.8%) were exposed to drugs reported to be associated with aplastic anemia, and 21 (8.9%) to toxic agents. Conclusions: The incidence of aplastic anemia in Barcelona is low but the case fatality rate is high. Advanced age and severe disease at the time of diagnosis were associated with decreased survival. ©2008 Ferrata Storti Foundation.
Original languageEnglish
Pages (from-to)518-523
JournalHaematologica
Volume93
Issue number4
DOIs
Publication statusPublished - 1 Apr 2008

Keywords

  • Aplastic anemia
  • Incidence
  • Mortality
  • Risk factors
  • Survival

Fingerprint Dive into the research topics of 'Epidemiology of aplastic anemia: A prospective multicenter study'. Together they form a unique fingerprint.

Cite this