JSM 2014 Home
Online Program Home
My Program

Abstract Details

Activity Number: 249
Type: Contributed
Date/Time: Monday, August 4, 2014 : 2:00 PM to 3:50 PM
Sponsor: Section on Statistical Consulting
Abstract #312989
Title: Rate Data Modeling: Using the Organ Procurement and Transplantation Network/United Network for Organ Sharing Database
Author(s): Meng-Ru Cheng*+ and Amylou Dueck and Evan P. Kransdorf and Octavio E. Pajaro and Yu-Hui Chang
Companies: Mayo Clinic and Mayo Clinic and Mayo Clinic and Mayo Clinic and Mayo Clinic
Keywords: rate data ; Poisson regression ; negative binomial regression ; zero-inflation
Abstract:

Poisson regression is widely used for analyzing count and rate data in clinical research. However, the assumption for equal variance and mean is difficult to satisfy in many practical settings. The purpose of this presentation is to demonstrate the range of analyses available for rate data. Approaches are illustrated with heart transplant data from the OPTN/UNOS database. We will examine the effect of match for ethnicity between organ donor and recipient on the rate of coronary allograft vasculopathy (CAV) events after heart transplant. The model diagnostics including scale and dispersion parameters will be evaluated for Poisson regression, negative binomial regression, zero-inflated Poisson Regression, and zero-inflated negative binomial regression. The model fit statistics and results will be compared and contrasted across different models. For each of the four fitted models, the graphics will be presented. The models ultimately show that match for ethnicity increases the risk of CAV for Caucasians but decreases the risk for Latinos, to varying degrees depending on the model selected.


Authors who are presenting talks have a * after their name.

Back to the full JSM 2014 program




2014 JSM Online Program Home

For information, contact jsm@amstat.org or phone (888) 231-3473.

If you have questions about the Professional Development program, please contact the Education Department.

The views expressed here are those of the individual authors and not necessarily those of the JSM sponsors, their officers, or their staff.

ASA Meetings Department  •  732 North Washington Street, Alexandria, VA 22314  •  (703) 684-1221  •  meetings@amstat.org
Copyright © American Statistical Association.