To evaluate the association between time to dementia and baseline risk factors 
  
   Lead Investigator:    Lu Wang
   Institution      :    Michigan
   E-Mail           :    luwang@umich.edu
   Proposal ID      :    100



   Proposal Description:
   In this project, we will explore the following three approaches to analyze the data.  1. Grouped survival analysis, by treating the visit time as fixed annually.  2. Develop a likelihood method for interval censored time to dementia, where both the observed censored intervals and the number of intervals are random.  3. Develop a methodology to account for missing covariates, including both baseline variables and time dependent variables. We will develop the weighted estimating methods and will target on some double-robust estimators as well.