This is the program for the 2010 Joint Statistical Meetings in Vancouver, British Columbia.

Abstract Details

Activity Number: 594
Type: Contributed
Date/Time: Wednesday, August 4, 2010 : 2:00 PM to 3:50 PM
Sponsor: Section on Survey Research Methods
Abstract - #306522
Title: Comparing Web Panel Samples vs. Non-Panel Samples of Medical Doctors
Author(s): Lin Chiat Chang*+ and Jeremy Brody
Companies: LinChiat Chang Consulting, LLC and Kantar Health
Address: , , ,
Keywords: web surveys ; physician panels ; web panels ; healthcare market research
Abstract:

Although web panels are widely used in market research, there are persistent concerns about panel conditioning, panel attrition, and self-selection biases. We compared web panel samples to "fresh" random samples recruited via telephone across 3 medical specialties: neurology (n=167 web vs. n=97 phone), pulmonology (n=83 web vs. n=68 phone), and pediatrics (n=56 web vs. n=60 phone). All physicians, regardless of sample source, completed the surveys via the Internet. Comparative analyses were conducted on 163 measures of practice characteristics, treatment choices, attitudes and perceptions. Focus was placed on whether key research conclusions differed by sample source. Few significant differences emerged between the panel samples and the non-panel samples, and no systematic bias was manifested by the panel samples. Methodological limitations of this study are addressed.


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