我们进行了案例对照研究来确定脊柱外科手术部位感染的危险因素。
Risk factors for surgical site infection were determined with univariate analyses and multivariate logistic regression.
很多研究员都指责案例对照法不是展现因果关系直接有力的方法，尤其因为它受制于大量的记忆误差。
Many researchers fault case-control work as being a weak method for showing direct causality, especially because it is subject to substantial recall bias.
对照电子商务和数字证书认证机构的理论分析，以重庆市数字证书认证中心有限公司为案例进行了全面细致的分析和研究。
According to the theories of EC and Certification Authority, this article has do a total accord analyses and studies to the ChongQing Certification Authority Company.
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