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目的分析1990-2008年浙江省宁波市乙型病毒性肝炎(乙肝)流行规律。方法用描述性流行病学方法对1990-2008年宁波市乙肝疫情资料进行分析。结果宁波市1990-2008年报告乙肝42469例,年平均发病率为39.05/10万,发病率最高为53.99/10万,最低为24.46/10万。乙肝患者20～44岁占乙肝发病总数的67.38%,0～7岁儿童乙肝的发病构成比从1990-1991年的6.40%下降到2002-2008年的0.96%。男女性别比为2.73:1。职业分类中,以农民和工人为主,分别占发病总数的46.64%和18.56%。结论宁波市1990-2008年报告乙肝总体发病呈下降趋势;农村发病高于城市;乙肝多为散发,无明显的季节高峰;乙肝病例以青壮年为主;男性发病人数多于女性;0～7岁儿童乙肝的发病构成比下降明显。
Objective To analyze the prevalence of hepatitis B (hepatitis B) in Ningbo City, Zhejiang Province from 1990 to 2008. Methods Descriptive epidemiological methods were used to analyze the epidemic situation of hepatitis B in Ningbo during 1990-2008. Results Ningbo City reported 424,66 cases of hepatitis B in 1990-2008, with an average annual incidence rate of 39.05 / 100000. The highest incidence rate was 53.99 / lakh and the lowest was 24.46 / lakh. Hepatitis B patients accounted for 67.38% of the total number of hepatitis B cases from 20 to 44 years old. The incidence of hepatitis B in children aged 0-7 years decreased from 6.40% in 1990-1991 to 0.96% in 2002-2008. The ratio of male to female is 2.73: 1. Occupation classification, mainly farmers and workers, accounting for 46.64% and 18.56% of the total incidence. Conclusion The overall incidence of hepatitis B in Ningbo City showed a decreasing trend from 1990 to 2008 in Ningbo City. The incidence of hepatitis B in rural areas was higher than that of the urban areas. Hepatitis B was mostly sporadic with no obvious seasonal peak. Hepatitis B cases were mostly young and middle-aged; The incidence of hepatitis B in old children decreased significantly.