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Introduction to Causal Directed Acyclic Graphs

Amber W. Trickey, PhD, MS, CPHS enior BiostatisticianS-SPIRE Works in Progress January 28, 2019@StanfordSPIREI ntroduction to CausalDirected Acyclic GraphsOverview What are DAGs & why do we need them? DAG rules & conventions How to construct a DAG Which variables should be included? How to determine covariates for adjustment? Examples: manual + DAG online tool Build your own DAGO bservational Health Services Research Big HSR datasets are observational Medicare HCUP: NIS, NEDS, NRD, SIDs Truven, Optum EMR: STARR Clinical Registries: NSQIP, VQI Observational comparative effectiveness 1 Treatments not assigned, determined by mechanisms of routine practice Actual mechanisms are often unknown However researchers can (and should) speculate on the treatment assignment process or mechanism Problem: correlation causation1 2013 AHRQ Developing a protocol for observational comparative effectiveness research: a user's guideCausal Graphs .

Jan 28, 2019 · Torchia MM, editors. Developing a protocol for observational comparative effectiveness research: a user's guide. Government Printing Office; 2013 Feb 21. 8. Greenland S, Pearl J, Robins JM. Causal diagrams for epidemiologic research. Epidemiology. 1999 Jan …

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