title: [Prevalence of and risk factors for hepatitis C in blood donors].
abstract: OBJECTIVE
  Determine hepatitis C prevalence and risk factors in blood donors from the Blood Bank at the Centro Médico Nacional 20 de Noviembre ISSSTE, in Mexico City.
  
  
  METHODS
  A total of 41,957 blood donors were included in the study was done from January 1996 to August 2000. To study risk factors, a case-control study cases were defined as blood donors with repeatedly positive anti-hepatitis C virus (HCV) ELISA test. Controls were defined as blood donors with negative anti-HCV ELISA test. All cases were interviewed a second time on HCV infection-associated risk factors. Odd ratio (OR) and confidence interval 95% (CI 95%) were calculated for each risk factoring in a univariate analysis. Multivariate analysis was performed subsequents to determine the independent contribution or each risk factor.
  
  
  RESULTS
  HCV crude total prevalence was 0.84%. Risk factors were found in 36.16% anti-HCV-positive blood donors. During the second interview, 30% of sero-positive blood donors recalled one or more risk factors they previously denied. The most important risk factors, found were as follows sexual relations with prostitutes (OR 7.48, CI 95% 1.43-38.92) transfusion (OR 6, CI 95% 2.62-13.72); nasal cocaine use (OR 8.89, CI 95%, 1.01-86.89); dental surgery (OR 8.89, CI 95% 1.01-86.89) and contact with hepatitis-infected subject (OR 3.01, CI 95% 1.17-7.70). Other risk factors did not show a significant association.
  
  
  CONCLUSIONS
  In this study, we found a crude total prevalence of 0.84%, very close to the prevalence reported in Mexican population by the National Center for Blood Transfusion.
authors.affiliation: Servicio de Gastroenterología, Centro Médico Nacional 20 de Noviembre, Instituto de Seguridad, Servicios Sociales para los Trabajadores del Estado (ISSSTE), México, D.F. lauraldeg@yahoo.com
authors.forename: Laura
authors.initials: L
authors.lastname: Ladrón-de Guevara
authors.forename: Nicolás
authors.initials: N
authors.lastname: Gómez
authors.forename: Mariana
authors.initials: M
authors.lastname: Vázquez-Cantarell
authors.forename: Sergio
authors.initials: S
authors.lastname: García-Méndez
authors.forename: Mauricio
authors.initials: M
authors.lastname: Di Silvio
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001782:Blood Donors; D003430:Cross-Sectional Studies; D005260:Female; D006526:Hepatitis C / Q000453:epidemiology* / Q000209:etiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D011446:Prospective Studies; D012307:Risk Factors
vernacular_title: Prevalencia y factores de riesgo para hepatitis C en donadores de sangre.