Influencing factors of hepatitis B virus infection in ocean seamen

Abstract

Objective To investigate the influencing factors of hepatitis B virus (HBV) infection in ocean seamen from Zhoushan island area,so as to provide the scientific basis for hepatitis B prevention in this district.Methods A total of 453 ocean seamen who received health examination and were detected HBsAg positive in Zhoushan Hospital from 1 July 2011 to 30 June 2012 were selected as infection group.There were 453 controls who were living in the same village paired to the cases with 2 year difference in age.The controls were engaged in the same work but HBsAg negative.The risk factors were compared between the two groups.Results The univariate analysis showed that hepatitis B vaccine was a protective factor for HBV infection (OR =0.507,x2=11.339,P＜0.05),and that drinking unboiled water and working abroad were the risk factors for HBV infection (OR=1.471,x2=2.215,P＜0.05).Multiple logistic regression analysis showed that hepatitis B vaccine was a protective factor for HBV infection (OR=0.523,x2=10.150,95％ CI:0.351-0.779) and that working abroad was a risk factor for HBV infection (OR=1.992,x2=5.000,95％ CI:1.089-3.646).Conclusions Working abroad is the main risk factor for HBV infection in ocean seamen and HBV vaccination is the protective factor for HBV infection.Therefore,HBV vaccination and sexual health education should be strengthened in island population. Key words: Hepatitis B; Ocean seamen; Influencing factors