病例对照研究法 casecontrol study ; control study ; nested casecontrol study 重叠病例对照研究 nested casecontrol study 病例对照研究 CONTROL STUDIES ; cont...
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病例对照研究 ... 病例对照研究法 casecontrol study ; control study ; nested casecontrol study 重叠病例对照研究 nested casecontrol study 病例对照研究 CONTROL STUDIES ; control study ...
基于4个网页-相关网页
方法采用现况调查和危险因素病例对照研究法进行研究。
Methods Prevalence survey and case-control study on risk factors was conducted.
采用原子发射光谱法于患者接受治疗前，测定研究组和对照组病例血清中15种微量元素水平，并分析老年性痴呆是否与血清微量元素水平具有相关性。
We measured 15 kinds of trace element by atomic emission spectrometry before the patients were treated, and analyzed the association between trace element and senile dementia.
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