Abstract
Purpose
LATIN is a multinational case–control study designed to identify risk factors for agranulocytosis and to estimate the incidence rate of the disease in some Latin American countries.
Methods
Each study site in Brazil, Argentina and Mexico conducted an active search of agranulocytosis patients in hematology clinics and looked for possible associations with drug use.
Results
The overall incidence rate was 0.38 cases per 1 million inhabitant–years. Agranulocytosis patients more often took medications already associated with agranulocytosis than controls (p = 0.01), mainly methimazole (OR 44.2, 95% CI 6.8 to infinity). The population attributable risk percentage (etiologic fraction) was 56%. The use of nutrient supplements was more frequent among patients than controls (p = 0.03).
Conclusions
Agranulocytosis seems to be very rare in Latin America. The lower than expected number of cases identified during the study period precluded estimation of the risk associated to individual drugs, with the exception of methimazol. However, this is the longest series of agranulocytosis cases ever gathered in Latin America, and information on drug exposures was collected prospectively. The conclusion is that drug-induced agranulocytosis does not seem to be a major public health problem in the study regions.
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Acknowledgments
The authors want to thank Joan Laporte and David Kaufman for the careful review of the text.
Disclosure
This study was supported by a grant from Sanofi Aventis and Boehringer Ingelheim. The study sponsors were not involved at all in the study design, data collection, data analysis, data interpretation, or writing of the report. The corresponding author had full access to all data in the study and had the ultimate responsibility for the decision to submit for publication.
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Investigators in the LATIN Study
Steering Committee: Nelson Hamerschlak, Ricardo Pasquini, Eliane Maluf, José Eluf Neto, Álvaro Avezum.
Executive Committee: Álvaro Avezum, Iria R. Okano, Fernanda de Oliveira Alves Lima, Luis Paulo Agostino de Magalhães Duprat, Alexandre Biasi Cavalcanti.
Independent Validation Committee: Marimília T. Pita, Roberto Passeto Falcão,
Luís G. Rosenfeld, Sandra R. Loggetto, Irene G. H. L. Metze, Andreza Alice Feitosa Ribeiro, Morgani Rodrigues, Elvira Deolinda Velloso
Data Management: Ruy Guilherme Rodrigues Cal, Marcos Rodrigues Gouveia
Statistician: Frederico R. Moreira
Advisory Board: David Kaufman, Samuel Shapiro, Joan R. Laporte, Ricardo Sesso,
Celso Guerra
Investigators:
Brazil: Hospital da Clínicas da Universidade Federal do Paraná, Curitiba: Eliane Maluf, Ricardo Pasquini, Maria Inês Neves, Solange Delazeri; Instituto de Hemoterapia de Goiânia, Goiânia: César. L. Sant’Anna, Geraldo S. Cunha Jr., Luciana S. Cunha Jr; Hemocentro Regional de Juiz de Fora, Juiz de Fora: Daniela W. Rodrigues, Abrahão Hallak Neto, Camila S. Hallak; Fundação de Hematologia e Hemoterapia do Amazonas (HEMOAM), Manaus: Leny M. Passos, Suênia Araujo, Lana Sulamita dos Santos Vecchia, Maria de Nazaré Faunier Barboza, Rosangela Castro; Fundação Hemope, Recife: Erika O. Coelho, Raul Melo, Maria F. Patú; Waldelourdes Souto Maior; Faculdade de Medicina da Universidade de São Paulo (FMUSP) Campus Ribeirão Preto, Ribeirão Preto: Rodrigo Calado de Rodrigues, Maria Carolina R Pintão, Daniel Mazza; Hemocentro Regional de Uberaba, Uberaba: Hélio M. de Souza, Ana Marcela R. Fosnseca, Gisele M. P. Sternick. Argentina: Hospital de Clínicas José de San Martín, Buenos Aires: Daniel Goldenberg (Buenos Aires Study Coordinator), Ariel Goldenberg; Hospital Francés, Buenos Aires: María Pía Amoroso Copello; Policlínica Bancaria, Buenos Aires: Carlos Marín; Hospital de Niños “Ricardo Gutierrez”, Buenos Aires: Raúl Plager, Guillermo Drelichman; Hospital Alvarez, Buenos Aires: Fernando Bezares; Hospital Churruca, Buenos Aires: Luis Palmer, Graciela Schwalb; Swiss Medical Group, Buenos Aires: Hugo Ferro; Hospital Italiano, Buenos Aires: Dorotea Fantl, María Paula Cárdenas. Mexico: Hospital San José Tec de Monterrey, Monterrey: José Rafael Borbolla, Nancy G. Maldonado.
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Hamerschlak, N., Maluf, E., Biasi Cavalcanti, A. et al. Incidence and risk factors for agranulocytosis in Latin American countries—the Latin Study. Eur J Clin Pharmacol 64, 921–929 (2008). https://doi.org/10.1007/s00228-008-0513-7
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DOI: https://doi.org/10.1007/s00228-008-0513-7