Fig. 1From: Robust estimation of dementia prevalence from two-phase surveys with non-responders via propensity score stratificationSchematic diagram of imputation and propensity score in each stratum * Estimation methods included simple estimation, regression estimation, and regression estimation with multiple imputation. Each stratum was imputed in the same way and the estimations were then combined. The covariates used by regression estimation were different at each stratum. Note: Propensity score for non-response was calculated by logistic regressionBack to article page