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Activity Number: 688
Type: Topic Contributed
Date/Time: Thursday, August 4, 2016 : 10:30 AM to 12:20 PM
Sponsor: Health Policy Statistics Section
Abstract #320083 View Presentation
Title: On the Impact of Informative Nonresponse in Logistic Regression
Author(s): Joanna Wang*
Companies: University of Technology Sydney
Keywords: 45 and Up Study ; informative nonresponse ; selection model ; sensitivity analysis

In this paper, we are interested in nonignorable missing data mechanism where the probability of nonresponse depends on the outcome. We consider a selection model for nonignorable nonresponse in logistic regression. Expressions for the bias in parameter estimates are derived in a simple case. Further, we propose a sensitivity analysis to study changes in parameter estimates under different assumptions. We adopt a Bayesian framework as it offers a flexible approach for incorporating different missing data mechanisms. Our modelling strategy is illustrated using survey data from the 45 and Up Study.

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

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