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	Dynamic Inverse Probability Weighting	Marginal Structural Model (MSM)
Ämnesområde	Kausal inferens	Kausal inferens
Familj	Regression model	Regression model
Ursprungsår	1986-2000	2000
Upphovsperson	James M. Robins and colleagues	James M. Robins, Miguel A. Hernan, Babette Brumback
Typ	Causal weighting estimator	Causal model / semiparametric weighting
Ursprungskälla	Robins, J. M., Hernan, M. A., & Brumback, B. (2000). Marginal structural models and causal inference in epidemiology. Epidemiology, 11(5), 550-560.	Robins, J. M., Hernan, M. A., & Brumback, B. (2000). Marginal structural models and causal inference in epidemiology. Epidemiology, 11(5), 550-560.
Alias	Dynamic IPW, Time-varying IPW, Longitudinal IPW, Sequential IPW	MSM, MSM-IPTW, marginal structural Cox model, weighted structural model
Närliggande	4	5
Sammanfattning	Dynamic Inverse Probability Weighting (Dynamic IPW) estimates the causal effect of a time-varying treatment sequence by reweighting observed data to mimic a hypothetical randomised trial. Developed by Robins and colleagues in the context of marginal structural models, it handles the challenge that in longitudinal settings, past treatment affects future covariates, which in turn affect future treatment — a feedback loop that standard regression cannot untangle.	A marginal structural model is a causal modeling framework designed to estimate the effect of a time-varying treatment in the presence of time-varying confounders that are themselves affected by prior treatment. By reweighting observations with inverse probability of treatment weights, MSMs create a pseudo-population in which confounding is eliminated, enabling unbiased estimation of causal treatment contrasts even when standard regression adjustments would fail.