title: Changes in the seroepidemiology of hepatitis B infection in Catalonia 1989-1996.
abstract: The objective of this study was to investigate the prevalence of hepatitis B markers in a representative sample of 2142 subjects in Catalonia, Spain, and to compare it with previous studies. Multiple logistical regression analysis was carried out to determine variables associated with the markers studied. The prevalence of anti-HBc and HBsAg was 9.1% and 1.2%, respectively. Male gender, urban habitat, birth place outside Catalonia and lower social class were associated with the presence of anti-HBc. Carrier status was only associated with male gender. Between 1989 and 1996 there was a decrease of 46% in the prevalence of serum HBV markers mainly in the 25-44 (P<0.0001) and 35-64 year (P=0.0002) age groups, in those born in Catalonia (P=0.003) and in those in the higher social classes (P<0.0001). These decreases can be explained by the improved socioeconomic conditions and, partially, by the routine pre-adolescent and risk group programmes of immunization.
authors.affiliation: Directorate of Public Health, Department of Health and Social Security, Barcelona, Spain. angelad@dsss.scs.es
authors.forename: A
authors.initials: A
authors.lastname: Domínguez
authors.forename: M
authors.initials: M
authors.lastname: Bruguera
authors.forename: J
authors.initials: J
authors.lastname: Vidal
authors.forename: P
authors.initials: P
authors.lastname: Plans
authors.forename: L
authors.initials: L
authors.lastname: Salleras
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002353:Carrier State / Q000453:epidemiology / Q000276:immunology; D002648:Child; D002675:Child, Preschool; D005260:Female; D006509:Hepatitis B / Q000453:epidemiology* / Q000276:immunology* / Q000517:prevention & control; D006510:Hepatitis B Antibodies / Q000097:blood; D006514:Hepatitis B Surface Antigens / Q000097:blood; D006801:Humans; D008297:Male; D008875:Middle Aged; D012424:Rural Population; D016036:Seroepidemiologic Studies; D012737:Sex Factors; D012959:Socioeconomic Factors; D013030:Spain / Q000453:epidemiology; D013997:Time Factors; D014505:Urban Population; D014611:Vaccination
chemical_list: D006510:Hepatitis B Antibodies; D006514:Hepatitis B Surface Antigens