词条 | Subgroup analysis |
释义 |
Aim of subgroup analysisThe aim of subgroup analysis is usually to assess whether the association of two variables differs depending on a third variable. For instance, investigators of a study testing the effect of an intervention (variable 1) on preventing myocardial infarction (variable 2) might be interested in whether the effect varies by smoking status (variable 3). Therefore, they could perform separate analyses for smokers and non-smokers and then compare the results. If results differ, there is a subgroup effect. TerminologyThe terminology is inconsistent. Alternative names for subgrouping variables include effect modifiers, predictive factors, or moderators. Alternative names for subgroup effects include effect modification and interaction. Some authors define effect modification and interaction differently, and distinguish different types of interaction. A more unspecific term is heterogeneity of treatment effects. See also
References1. ^{{cite journal|url=http://www.nejm.org/doi/full/10.1056/NEJMp068070|author=Lagakos SW|journal=NEJM|title=The challenge of subgroup analyses--reporting without distorting|date=20 April 2006|volume = 354|issue = 16|pages = 1667–9|pmid = 16625007|doi=10.1056/NEJMp068070}} {{statistics-stub}} 3 : Statistical analysis|Design of experiments|Medical statistics |
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