Results: The most influential parameters of sample size were susceptibility frequency of the genotype, environmental exposure factors in the population, and genetic modes.

结果：主要影响样本大小的参数为易感基因频率、环境因素暴露率、基因遗传方式，而疾病的发生率对样本量影响很小。

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Results The frequency of DD genotypes was significantly higher in hypertensive patients than that in health group. But ISI among the different genotype groups showed no difference.

结果高血压组DD基因型频率显著高于对照组，而各基因型间ISI无差别。

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Objective: To study the distribution of genotype frequency and gene frequency of ABO blood type in different population and the relation between ABO blood type and disease.

目的：了解abo血型频率和基因频率在不同人群中的分布以及血型与疾病的关系。

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