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2008年4月22日至5月11日洞波中学确诊的26例现症住院病毒性甲型肝炎(甲肝)病例为病例组,采用1:2配对的方法,选择同班、同性别、未接种过甲肝疫苗、未发病的52名同学为对照组,进行危险因素病例对照调查分析。结果,洞波中学新址校区甲肝罹患率为29.51%;发病与春游饮用未经消毒处理的山沟水有关联(χ2=4.551,P=0.033),OR=4.865(ORU=23.204,ORL=1.020)。
From April 22 to May 11, 2008, 26 confirmed cases of inpatient viral hepatitis A (H) cases in Dongbo High School were selected as case group. The method of 1: 2 matching was used to select the same class, same sex, and unvaccinated Hepatitis A vaccine, non-onset of 52 students for the control group, the case-control analysis of risk factors. Results The prevalence of hepatitis A in the new campus of Dongbo Middle School was 29.51%. The incidence was related to the spring ravine without drinking water disinfection (χ2 = 4.551, P = 0.033), OR = 4.865 (ORU = 23.204, ORL = 1.020).