Fig. 1From: Use of multidimensional item response theory methods for dementia prevalence prediction: an example using the Health and Retirement Survey and the Aging, Demographics, and Memory StudyFlowchart for the estimation procedure. Data from the Health and Retirement Study (HRS) and the Aging, Demographics, and Memory study (ADAMS) are used in a multidimensional item response theory model to calculate factor scores of cognition and function. These factor scores, together with demographic information are then utilized in a logistic regression model to predict dementia status. This algorithm is then used to assess prevalence in HRS and model accuracy is assessed using ADAMSBack to article page