结论在对医院资料进行统计分析时，应遵循观察性研究的原则和方法，以避免可能存在的信息偏倚、选择偏倚和混杂偏倚。
Conclusion The principles and methods for observational studies should be followed to reduce information bias, selection bias and confounding bias in statistical analysis of hospital data.
偏倚评估的方法常用漏斗图，控制方法包括预先注册临床试验、发布研究信息、系统评价时全面收集所有发表和未发表的临床试验。
A funnel plot is a useful tool to assess bias in systematic review. The methods of control the bias involved in pre-registering the clinical trials, publish...
偏倚评估的方法常用漏斗图，控制方法包括预先注册临床试验、发布研究信息、系统评价时全面收集所有发表和未发表的临床试验。
A funnel plot is a useful tool to assess bias in systematic review. The methods of control the bias involved in pre-registering the clinical trials, publish...
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