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运用推论统计的方法分析流行病学调查数据的分布性质,有助于对流行病学资料进行细致的分析研究。乙型肝炎表面抗原(H-BsAg)在家庭中呈聚集现象,近几年来,国内外均有许多报道。HBsAg 在每个个体中表现非阳即阴,在家庭中可多则一家数例,少则一、二例阳性,而多数家庭中则是阴性或一例阳性。这两类情况并非随机分配,所以可用二项分布来分析家庭中出现的概率,检验 HBsAg 有无家庭聚集性。现就我区病毒性肝炎调查的488户,为分析其 HBsAg 分布的规律性,用二项分布检验如下。
The use of inferential statistics to analyze the distribution of epidemiological survey data is helpful for the detailed analysis of epidemiological data. Hepatitis B surface antigen (H-BsAg) is aggregated in the family. In recent years, there are many reports both at home and abroad. HBsAg in each individual manifests non-yang and yin, in the family can be as many as a few cases, ranging from one or two positive, while in most families is negative or a positive. These two types of situations are not randomly assigned, so the binomial distribution can be used to analyze the probability of occurrence in the family to test for the presence or absence of familial aggregation of HBsAg. Now 488 of our area of viral hepatitis investigation, in order to analyze the regularity of its distribution of HBsAg, with binomial distribution test as follows.