有五种方法显示 p值无变化 如下表
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Sample | Ps R2 LR chi2 p>chi2 MeanBias MedBias B R %Var
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Unmatched | 0.138 1362.37 0.000 7.7 6.3 94.1* 0.61 100
Matched | 0.023 438.89 0.000 2.5 1.7 35.6* 1.05 60
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只有卡尺0.01 匹配后 处理组与控制组之间差异消失
Sample | Ps R2 LR chi2 p>chi2 MeanBias MedBias B R %Var
-----------+-----------------------------------------------------------------------
Unmatched | 0.138 1362.37 0.000 7.7 6.3 94.1* 0.61 100
Matched | 0.006 107.01 0.901 1.0 0.7 17.5 1.10 40
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这个到底是什么原因,影响匹配后处理效应的结果吗?