临床研究常用统计方法的选择与误用

2011-12-10 MedSci MedSci原创

复旦大学临床流行病学/循证医学中心复旦大学附属中山医院施鹏　随着国内外医学期刊越来越重视统计方法的正确应用，国内临床医生早已认识到医学统计学在临床研究中的重要作用。然而，部分临床医生对统计方法的选择还存在一定的困难，时常会出现误用统计方法的情况。本文对常用统计分析方法进行梳理，指出常见的错误，以帮助临床医生做出正确的选择。　　统计分析的一个目的就是通过样本信息推论总体特征，分析单个或多

复旦大学临床流行病学/循证医学中心复旦大学附属中山医院施鹏　随着国内外医学期刊越来越重视统计方法的正确应用，国内临床医生早已认识到医学统计学在临床研究中的重要作用。然而，部分临床医生对统计方法的选择还存在一定的困难，时常会出现误用统计方法的情况。本文对常用统计分析方法进行梳理，指出常见的错误，以帮助临床医生做出正确的选择。　　统计分析的一个目的就是通过样本信息推论总体特征，分析单个或多个暴露变量和结局变量的关系。统计学将数据分为计量资料和分类资料两大类型。在随访研究中，还有一种数据为生存资料。　　统计分析方法主要根据结局变量的类型，综合考虑研究目的、设计类型及适用条件等因素进行选择。　　计量资料统计方法的选择　　计量资料是可测量、有计量单位的数据，反映的是数据“量”的特征。它可以是连续的，如身高（cm）、体重（kg）、血压（mmHg），也可以是离散的，如脉搏次数（次/分）、家庭人口数（个）。在结局变量为计量资料时，选择统计方法须考虑：① 结局变量是否满足参数检验的前提条件；② 暴露变量的数量和类型；③ 设计类型。　　参数检验要求定量资料应满

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2016-04-13 wei834766788

有用，继续学习

166 0
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2016-02-20 wei834766788

很有用

213 0
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2016-02-20 wei834766788

多学习

159 0
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2012-05-30 xuejp2000

有用，以后多点。

149 0
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2012-05-28 luoyand

有用

214 0
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2012-05-26 jiafufeng

很好，有些问题容易被忽略。

132 0
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2012-04-04 lhg662

很有用值得收藏，谢谢分享，

131 0
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2011-12-12 12498761m60暂无昵称

#统计方法#

89 0

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