统计研究设计:应说明统计研究设计的名称和主要做法,如调查设计,应分为前瞻性、回顾性或横断面调查研究;实验设计,应交代具体的设计类型,如自身配对设计、成组设计、交叉设计、析因设计、正交设计等;临床试验设计,应交代属于第几期临床试验, Statistical research design: The name and main practices of the statistical research design should be described. For example, the survey design should be divided into prospective, retrospective or cross-sectional investigation and study. The experimental design should include specific design types such as self-matching design, grouping Design, cross design, factorial design, orthogonal design, etc .; clinical trial design, should be submitted to the first few clinical trials,