0097 Matching and Counter-Matching on Propensity Scores in Nested Case-Control Studies
نویسندگان
چکیده
منابع مشابه
Matching and Propensity Scores
The popularity of matching techniques has increased considerably during the last decades. They are mainly used for matching treatment and control units in order to estimate causal treatment effects from observational studies or for integrating two or more data sets that share a common subset of covariates. In focusing on causal inference with observational studies, we discuss multivariate match...
متن کاملMatching with Propensity Scores to Reduce Bias in Observational Studies
In observational studies subjects are not randomly assigned to treatment and control groups. Therefore, both groups can be significantly different from each other and their differences after applying a treatment cannot be attributed to the treatment effect. Propensity scores methods offer a way to balance groups by matching treatment and control units based on a set of covariates. This paper ex...
متن کاملNested case-control studies: should one break the matching?
In a nested case-control study, controls are selected for each case from the individuals who are at risk at the time at which the case occurs. We say that the controls are matched on study time. To adjust for possible confounding, it is common to match on other variables as well. The standard analysis of nested case-control data is based on a partial likelihood which compares the covariates of ...
متن کاملImproving the efficiency of nested case-control studies of interaction by selecting controls using counter matching on exposure.
BACKGROUND Studies of the effect of exposure to a risk factor measured in an entire cohort may be augmented by nested case-control subsets to investigate confounding or effect modification by additional factors not practically assessed on all cohort members. We compared three control-selection strategies-matching on exposure, counter matching on exposure, and random sampling-to determine which ...
متن کاملOn the estimation and use of propensity scores in case-control and case-cohort studies.
The use of propensity scores to adjust for measured confounding factors has become increasingly popular in cohort studies. However, their use in case-control and case-cohort studies has received little attention. The authors present some theory on the estimation and use of propensity scores in case-control and case-cohort studies and present the results of simulation studies that examine whethe...
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ژورنال
عنوان ژورنال: Occupational and Environmental Medicine
سال: 2014
ISSN: 1351-0711,1470-7926
DOI: 10.1136/oemed-2014-102362.32