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1.统计研究设计:文中应说明统计研究设计的名称和主要做法。如调查设计应说明为前瞻性、回顾性或横断面调查研究;实验设计则应说明具体设计类型,如自身配对设计、成组设计、交叉设计、析因设计、正交设计等。统计设计应遵循重复、随机、对照、均衡的基本原则进行,对于如何控制重要非试验因素的干扰和影响需进行必要的解释。2.资料的表达:服从正态分布的定量资料用χ珔±s表达近似,呈偏态分布的定量资料用M(QR)表达;编
1. Statistical research design: The text should describe the name of the statistical research design and the main practices. If the survey design should be described as prospective, retrospective or cross-sectional survey; experimental design should specify the specific types of design, such as their own pairing design, group design, cross design, factorial design, orthogonal design. Statistical design should follow the basic principles of repetition, randomization, comparison, and balance. Necessary explanations are needed on how to control the interference and impact of important non-experimental factors. 2. The expression of the data: The quantitative data obeying the normal distribution was expressed by χ 珔 ± s, and the quantitative data showing the skewed distribution was expressed by M (QR)