title: [Prevalence of hepatitis B in Chaoyang district, Beijing in 2010].
abstract: OBJECTIVE
  To study the prevalence of hepatitis B infections and carrier status among general population in Chaoyang district, Beijing in 2010.
  
  
  METHODS
  From May to December 2010, 14 491 subjects over 12 months old were selected by multistage random cluster sampling method from residents in Chaoyang district, Beijing. Five millilitre venous blood specimens were collected from these subjects to test hepatitis B virus antigens and antibodies. Status of hepatitis B infections were analyzed in different age, sex and registered permanent residence groups.
  
  
  RESULTS
  The overall positive rate of surface antigen (HBsAg) was 2.66% (383/14 410). The lowest rate of 0.56% (9/1603) was found in the 1 to 14 years old group and the 35 to 44 years old group had the highest rate of 4.27% (92/2154). The rate in subjects younger than 24 years old was 1.03% (31/2986). The overall positive rate of surface antibody (anti-HBs) was 40.21% (5798/14 421). The highest positive rate of anti-HBs (80.59%, 407/505) was found in the 1 to 4 years old group. The overall positive rate of core antibody (anti-HBc) was 30.26% (4364/14 424). The overall hepatitis B virus infection rate was 30.32% (4364/14 393). For male and female groups, the positive rates of HBsAg were 2.93% (179/6108) and 2.44% (202/8287) respectively (χ² = 3.32, P > 0.05); anti-HBs were 41.93% (2563/6113) and 38.96% (3231/8293) respectively (χ² = 12.88, P < 0.01); and anti-HBc were 31.39% (1919/6114) and 29.39% (2438/8295) respectively (χ² = 6.65, P = 0.01). For local residents group and mobile population group, the positive rates of HBsAg were 2.46% (283/11 510) and 3.60% (98/2719) respectively (χ² = 11.08, P < 0.01); anti-HBs were 37.11% (4293/11 568) and 53.07% (1445/2723) respectively (χ² = 233.51, P < 0.01); and anti-HBc were 30.83% (3567/11 570), and 28.41% (774/2724) respectively (χ² = 6.08, P < 0.05).
  
  
  CONCLUSIONS
  The positive rate of HBsAg in population younger than 24 years old has reached a relatively low level. The mobile population has significantly higher positive rate of HBsAg than local residents, indicating the need for enhancing prevention and control measures for hepatitis B for the mobile population and local residents over 25 years old.
authors.affiliation: Institute for Infectious Disease and Endemic Disease Control, Beijing Center for Disease Prevention and Control, Beijing 100013, China.
authors.forename: Xiu-chun
authors.initials: XC
authors.lastname: Zhang
authors.forename: Xing-huo
authors.initials: XH
authors.lastname: Pang
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
authors.forename: Li-li
authors.initials: LL
authors.lastname: Han
authors.forename: Chang-ying
authors.initials: CY
authors.lastname: Lin
authors.forename: Jian-xin
authors.initials: JX
authors.lastname: Ma
authors.forename: Ke
authors.initials: K
authors.lastname: Wu
authors.forename: Shu-ming
authors.initials: SM
authors.lastname: Li
authors.forename: Quan-yi
authors.initials: QY
authors.lastname: Wang
authors.forename: Li-qiu
authors.initials: LQ
authors.lastname: Li
authors.forename: Huai
authors.initials: H
authors.lastname: Wang
authors.forename: Pei
authors.initials: P
authors.lastname: Gao
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D002681:China / Q000453:epidemiology; D005260:Female; D006509:Hepatitis B / Q000097:blood / Q000453:epidemiology*; D006514:Hepatitis B Surface Antigens / Q000097:blood; D006801:Humans; D007223:Infant; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D016036:Seroepidemiologic Studies; D014505:Urban Population; D055815:Young Adult
chemical_list: D006514:Hepatitis B Surface Antigens