方法以社区为基础的病例对照研究。
本文进行了一项队列内病例对照研究。
神经管畸形;病例对照研究;危险因素。
设计:病例对照研究。
设计:足底压力测量系统设计及病例对照研究。
Design: Design of measuring system for plantar pressure and a case controlled trial.
方法采用病例对照研究和中药治疗组自身前后对照研究。
Methods Case control study and self-control study in Chinese herbal treatment group were conducted.
研究设计:为试验一种新的诊断方法而做的预期病例对照研究。
Study Design. Prospectie case-control study testing a new diagnostic method.
这种类型的研究被称为病例对照研究,它不能够证明两者之间的因果关系。
This type of study design, known as "case-control," cannot prove cause-and-effect.
设计:病例-对照研究。
设计病例对照临床研究。
采用诊断试验研究方法,分病例组和正常对照组。
All experiment objects were divided into the case group and the control group.
采用诊断试验研究方法,分病例组和正常对照组。
All experiment objects were divided into the case group and the control group.
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