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本文采用历史性前瞻调查研究方法,确定了该起甲肝暴发疫情为水型传播所致。结果显示:暴露及未暴露生水人群,甲肝罹患率分别为8.86％、2.09％,X~2=35.65 P<0.001,RR4.32、AR6.77％、AB％76.41％。常饮生水、偶饮生水、不饮生水人群甲肝罹患率分别为12.21％(26/213)、3.86％(9/233)、1.11％(10/901),X=64.33和6.93 P<0.001和0.01,RR分别为11.00、3.48、1.0。
In this paper, a historical study of prospective investigation to determine the onset of hepatitis A outbreak as a result of waterborne transmission. The results showed that the prevalence rates of hepatitis A were 8.86%, 2.09%, X ~ 2 = 35.65 P <0.001, RR4.32, AR 6.77% and AB% 76.41% respectively. The prevalence rates of hepatitis A were 12.21% (26/213), 3.86% (9/233), 1.11% (10/901), X = 64.33 and 6.93 P <0.001 and 0.01, RR respectively 11.00,3.48,1.0.