The common methods of statistical analysis for quantitative data have t test, analysis of variance and rank test. They seem simple, but are liable to be misused.
定量资料的一般性统计分析中比较常用的方法就是t检验、方差分析与秩和检验，看起来简单，却容易出错。
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.
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。
METHODS: the fully recorded data of 80 infants with central coordination disorder were collected for statistical analysis of the influencing factors.
方法：收集本科收治记录完整的80例中枢性协调障碍婴儿的影响因素进行统计学分析。
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