JSM 2014 Home
Online Program Home
My Program

Abstract Details

Activity Number: 455
Type: Contributed
Date/Time: Wednesday, August 6, 2014 : 8:30 AM to 10:20 AM
Sponsor: Biometrics Section
Abstract #313772
Title: Measuring the Impact of High-Dimensional Missing Data in EMA Studies
Author(s): Hui Xie*+ and Donald Hedeker and Robin Mermelstein
Companies: and University of Illinois at Chicago and UIC
Keywords: nonignorability ; sensitivity ; MAR ; longitudinal data
Abstract:

Missing data are ubiquitous in cancer and other health-related studies that utilize modern intensive measurement methods. For example, in data collected using Ecological Momentary Assessment (EMA) methods, there can be a moderate amount of missing data because of study participants' nonresponses to those random prompts. It is often suspected that missing data caused by such prompt nonresponses are nonrandom so that the observed data may be a self-selected nonrandom subset of a person's background mood. Such nonignorable missingness needs to be properly accounted for in data analyses. However, unlike in traditional studies, nonignorable missingness in these intensive data poses significant new analytic challenges and calls for more general, flexible, and computationally feasible methods that are applicable in these studies to quantify and improve the reliability and usability of the collected data. To meet these challenges, we develop principled and parsimonious statistical measures that are applicable to these new kinds of intensive data to quantify the reliability and validity of empirical findings to nonignorable missingness.


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.