手法を比較

	動的時間逆確率重み付け	Marginal Structural Model (MSM)
分野	因果推論	因果推論
系統	Regression model	Regression model
提唱年	1986-2000	2000
提唱者	James M. Robins and colleagues	James M. Robins, Miguel A. Hernan, Babette Brumback
種類	Causal weighting estimator	Causal model / semiparametric weighting
原典	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.
別名	Dynamic IPW, Time-varying IPW, Longitudinal IPW, Sequential IPW	MSM, MSM-IPTW, marginal structural Cox model, weighted structural model
関連	4	5
概要	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.