医学论文数据统计表

Topic: Dan red injection of unstable angina patients with vascular endothelial function and influence of inflammatory markersThe author units: nanjing university of traditional Chinese medicine clinical medical schoolObjective: to explore Dan red injection to unstable angina (UAP) patients with vascular endothelial dysfunction related factors, inflammatory factor leels influence. Methods: 72 cases according to the principle of 1:1 UAP patients were randomly divided into the treatment group (Dan red group) and control group (36 cases of conventional group) 36 cases and control; to conventional treatments. In treatment group based on conventional drugs to Dan red injection therapy (Dan red injection 30ml + physiological saline, 250ml ivgtt, qd), treatment for two weeks. Test before and after the treatment of serum endothelin - 1 (ET - 1), nitric oxide (NO), allergic c-reactive protein (hs) - the fibrinogen CRP), (Fg), tumor necrosis factor (TNF alpha (alpha) level changes. Results: treatment before two groups patients serum ET - 1, hs - CRP, Fg and TNF alpha levels were significantly increased, serum level is aubject are obviously decreased, the treatment group serum ET - 1, hs - CRP, Fg and TNF alpha level is more significant decline control group (P < ), serum level was elevated aubject to control more significant (P < ). Conclusion: Dan red injection can effectively reduce the UAP patients serum ET - 1, hs - CRP, Fg and TNF alpha level level, increase serum aubject level, can inhibit inflammation, improves endothelial function of good Dan red injection unstable angina endothelial function of proinflammatory factorTable - 1 two groups of patients before and after the treatment of serum ET - 1, NO level is (+ S)Note: Dan red group compared before and after treatment, P < ; u Conventional group compared before and after treatment, P < ); so The two groups after treating comparison, ▲ P < 2-2 groups before and after the treatment of serum hs - CRP, Fg and TNF alpha level is (+ S)Note: Dan red treatment group before-and-after, enables delta P < , Conventional treatment group before-and-after, a P < , The two groups after treating comparison, ☆ P < .

缺失值的处理：缺失值是人群研究中不可避免的问题，其处理方式的差异可能在不同程度上引入偏倚，因此，详细报告数据清理过程中缺失值的处理方法有助于读者对潜在偏倚风险进行评价。例如，瑞舒伐他汀试验在统计分析部分详细说明了缺失值的填补策略，包括：将二分类结局中的缺失值视为未发生事件；将生物标志物和心电图测量中的缺失值进行多重填补（multiple imputation）；为了证明缺失值处理的合理性和填补结果的稳定性，研究还比较了多重填补与完整数据（complete-case）分析的结果。2、数据的预处理：实施统计分析之前往往需要将原始数据进行预处理，如：对连续变量进行函数转换使其更接近正态分布，基于原始数据构建衍生变量，将连续变量拆分为分类变量或将分类变量的不同类别进行合并等。医学论文应报告处理原始数据的方法及依据，瑞舒伐他汀试验即在统计分析部分描述了对血液生物标志物的对数转换。3、变量分布特征描述：确定统计分析使用的变量，并针对每一个变量的分布特征进行描述，是决定研究选用何种统计分析方法的基础。医学期刊虽然普遍对此提出要求，但作者往往套用常用方法，如：连续变量符合正态分布时，采用均数（标准差）描述，否则采用中位数（四分位间距）描述；分类变量采用频数（百分比）描述等。事实上，应根据研究设计类型、统计分析目的和数据特征选择恰当的描述方法。例如，CKB选择采用年龄、性别和地区校正的均值和率来描述人群分布特征，而非简单的报告连续变量的均数和分类变量的构成比。4、主要分析（primary analysis）：指针对研究结局的统计分析，是研究论文的核心证据。因此，医学论文应详细描述主要分析的实施过程和适用性。在试验性研究中，应明确统计分析数据集、试验效应指标、相对或绝对风险及其置信区间的计算方法、以及假设检验的方法。