Abstract #300026

This is the preliminary program for the 2003 Joint Statistical Meetings in San Francisco, California. Currently included in this program is the "technical" program, schedule of invited, topic contributed, regular contributed and poster sessions; Continuing Education courses (August 2-5, 2003); and Committee and Business Meetings. This on-line program will be updated frequently to reflect the most current revisions.

To View the Program:
You may choose to view all activities of the program or just parts of it at any one time. All activities are arranged by date and time.

The views expressed here are those of the individual authors
and not necessarily those of the ASA or its board, officers, or staff.

Back to main JSM 2003 Program page
JSM 2003 Abstract #300026
Activity Number: 461
Type: Invited
Date/Time: Thursday, August 7, 2003 : 10:30 AM to 12:20 PM
Sponsor: ENAR
Abstract - #300026
Title: A Sensitivity Analysis for Subverting Randomization in Controlled Trials: Dealing with Unobserved Imbalances
Author(s): Sue M. Marcus*+
Companies: Mount Sinai School of Medicine
Address: 7200 McCallum St., Philadelphia, PA, 19119,
Keywords: treatment efficacy ; subverting randomization ; sensitivity analysis ; bias
Abstract:

In some randomized controlled trials, subjects with a better prognosis may be diverted into the treatment group. This subverting of randomization results in an unobserved noncompliance with the originally intended treatment assignment. Consequently, the estimate of treatment effect from these trials may be biased. This talk will clarify the determinants of the magnitude of bias and gives a sensitivity analysis that associates the amount that randomization has been subverted and the resulting unobserved bias in treatment effect estimation. The methods are illustrated with a randomized control trial that evaluates the efficacy of a culturally sensitive AIDS education video.

  • The address information is for the authors that have a + after their name.
  • Authors who are presenting talks have a * after their name.

Back to the full JSM 2003 program

JSM 2003 For information, contact meetings@amstat.org or phone (703) 684-1221. If you have questions about the Continuing Education program, please contact the Education Department.
Revised March 2003