Slide Presentation from the AHRQ 2007 Annual Conference

Models

• Problem with tobit model
  • Assumption: truncated normal distribution
  • A deviation to the assumption will lead to significant bias
• Using binary PSIs as dependent variables
  • Generalized Estimating Equations (GEE) Logit Model (predict odds of bad performance)
  • Log(p_it/1-p_it)= b₀ + b₁CAH_it+ Σb_nX_it + Σb_mZ_t + e_it
  • The variance function is p_it(1-p_it)
  • We assume the within-subject association among repeated measures is a first-order autoregressive correlation pattern