Hu Chunyan,Hu Liangping,Causal mediation effect analysis based on different variable stratification[J].SICHUAN MENTAL HEALTH,2022,35(5):412-417

Causal mediation effect analysis based on different variable stratification

DOI：10.11886/scjsws20220911003

English keywords:Causal mediation effect Stratified analysis Variable level Evaluation Covariate

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Author Name	Affiliation	Postcode
Hu Chunyan	Graduate School， Academy of Military Sciences PLA China， Beijing 100850， China	100850
Hu Liangping^*	Graduate School， Academy of Military Sciences PLA China， Beijing 100850， China Specialty Committee of Clinical Scientific Research Statistics of World Federation of Chinese Medicine Societies， Beijing 100029， China	100029

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English abstract:

The purpose of this paper was to introduce the setting method of the three types of variable levels in the causal mediation effect analysis and the implementing calculation method under the condition of stratification by using SAS. The setting of the three types of variable levels referred to the setting of the levels of treatment variable， the mediator variable and the covariate. Besides， a specific level combination could also be set for two variables. Through an example， with the help of the enveluate statement in proc causualmed procedure， this paper used an example to conduct the causal mediation effect based on different variable stratification， and gave the output results and explanations.

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