Johns Hopkins Bloomberg
School of Public Health
624 N. Broadway
Baltimore, MD 21205
NBER Working Papers and Publications
|October 2011||Estimating Patients' Preferences for Medical Devices: Does the Number of Profile in Choice Experiments Matter?|
with John Bridges, Karin Groothuis-Oudshoorn: w17482
Background: Most applications of choice-based conjoint analysis in health use choice tasks with only two profiles, while those in marketing routinely use three or more. This study reports on a randomized trial comparing paired with triplet profile choice formats focused on measuring patient preference for hearing aids.
Methods: Respondents with hearing loss were drawn from a nationally representative cohort, completed identical surveys incorporating a conjoint analysis, but were randomized to choice tasks with two or three profiles. Baseline differences between the two groups were explored using ANOVA and chi-square tests. The primary outcomes of differences in estimated preferences were explored using t-tests, likelihood ratio tests, and analysis of individual-level models estimated ...