A new criterion for confounder selection.
A new criterion for confounder selection.
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DOI:
10.1111/j.1541-0420.2011.01619.x
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发表时间:
2011-12
期刊:
影响因子:
1.9
通讯作者:
Shpitser I
中科院分区:
文献类型:
--
作者:
VanderWeele TJ;Shpitser I
We propose a new criterion for confounder selection when the underlying causal structure is unknown and only limited knowledge is available. We assume all covariates being considered are pretreatment variables and that for each covariate it is known (i) whether the covariate is a cause of treatment, and (ii) whether the covariate is a cause of the outcome. The causal relationships the covariates have with one another is assumed unknown. We propose that control be made for any covariate that is either a cause of treatment or of the outcome or both. We show that irrespective of the actual underlying causal structure, if any subset of the observed covariates suffices to control for confounding then the set of covariates chosen by our criterion will also suffice. We show that other, commonly used, criteria for confounding control do not have this property. We use formal theory concerning causal diagrams to prove our result but the application of the result does not rely on familiarity with causal diagrams. An investigator simply need ask, “Is the covariate a cause of the treatment?” and “Is the covariate a cause of the outcome?” If the answer to either question is “yes” then the covariate is included for confounder control. We discuss some additional covariate selection results that preserve unconfoundedness and that may be of interest when used with our criterion.
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DOI:
10.1097/ede.0b013e3181a819a1
发表时间:
2009-07
期刊:
Epidemiology (Cambridge, Mass.)
影响因子:
--
作者:
Schisterman EF;Cole SR;Platt RW
通讯作者:
Platt RW
影响因子:
2
作者:
Rubin, Donald B.
通讯作者:
Rubin, Donald B.
影响因子:
2.1
作者:
LAURITZEN, SL;DAWID, AP;LEIMER, HG
通讯作者:
LEIMER, HG
影响因子:
6.3
作者:
Hernán, MA;Robins, JM
通讯作者:
Robins, JM
影响因子:
2.7
作者:
Pearl, J
通讯作者:
Pearl, J