Published Jan 2013
Johnson FR, Lancsar E, Marshall, D, et al. Constructing experimental designs for discrete-choice experiments: Report of the ISPOR conjoint analysis experimental design good research practices task force. Value Health 2013;16:3-13.
Stated-preference methods are a class of evaluation techniques for
studying the preferences of patients and other stakeholders. While
these methods span a variety of techniques, conjoint-analysis
methods—and particularly discrete-choice experiments (DCEs)—have
become the most frequently applied approach in health care in recent
years. Experimental design is an important stage in the development of
such methods, but establishing a consensus on standards is hampered
by lack of understanding of available techniques and software. This
report builds on the previous ISPOR Conjoint Analysis Task Force
Report: Conjoint Analysis Applications in Health—A Checklist: A Report
of the ISPOR Good Research Practices for Conjoint Analysis Task Force.
This report aims to assist researchers specifically in evaluating alternative
approaches to experimental design, a difficult and important
element of successful DCEs. While this report does not endorse any
specific approach, it does provide a guide for choosing an approach that
is appropriate for a particular study. In particular, it provides an
overview of the role of experimental designs for the successful implementation
of the DCE approach in health care studies, and it provides
researchers with an introduction to constructing experimental designs
on the basis of study objectives and the statistical model researchers
have selected for the study. The report outlines the theoretical requirements
for designs that identify choice-model preference parameters
and summarizes and compares a number of available approaches for
constructing experimental designs. The task-force leadership group
met via bimonthly teleconferences and in person at ISPOR meetings
in the United States and Europe. An international group of
experimental-design experts was consulted during this process to
discuss existing approaches for experimental design and to review the
task force’s draft reports. In addition, ISPOR members contributed to
developing a consensus report by submitting written comments during
the review process and oral comments during two forum presentations
at the ISPOR 16th and 17th Annual International Meetings held in
Baltimore (2011) and Washington, DC (2012).
Keywords: conjoint analysis, discrete-choice experiment, experimental design, stated preferences.
Copyright © 2017, International Society for Pharmacoeconomics and Outcomes Research (ISPOR). Published by Elsevier Inc.