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The Implications of Using Lagged and Baseline Exposure Terms in Longitudinal Causal and Regression Models.


ABSTRACT: There are now many published applications of causal (structural) models for estimating effects of time-varying exposures in the presence of confounding by earlier exposures and confounders affected by earlier exposures. Results from these models can be highly sensitive to inclusion of lagged and baseline exposure terms for different visits. This sensitivity is often overlooked in practice; moreover, results from these models are not directly comparable to results from conventional time-dependent regression models, because the latter do not estimate the same causal parameter even when no bias is present. We thus explore the implications of including lagged and baseline exposure terms in causal and regression models, using a public data set (Caerphilly Heart Disease Study in the United Kingdom, 1979-1998) relating smoking to cardiovascular outcomes.

SUBMITTER: Mansournia MA 

PROVIDER: S-EPMC8045477 | biostudies-literature |

REPOSITORIES: biostudies-literature

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