Many problems in study designs have affected the validity of scientific researches seriously.We must undemtand the methodology of research,especially clinical epidemiology and biostatistics,and recognize the urgency in selection and implement of right study design.Thereafter we can promote the research capability and improve the overall quality of scientific researches.%目前在科研设计方法上存在的诸多问题严重影响着科研的质量.因此,应当加深对科研方法内涵的理解,提高对正确运用科研设计方法迫切性的认识,才能切实增强科研能力,提高科研质量.
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