Key clinical point: Comparing the reliability, feasibility, and internal and predictive validity of conjoint scaling methods against better-established rating scale and time tradeoff methods for assessing prostate cancer (PCa) utilities in men at risk for PCa.
Major finding: Rating scales and conjoint measures demonstrated significantly higher internal validity compared to time tradeoff when evaluated through R2 of the fitted utility function.
Study details: 194 men who were biopsy negative for PCa were randomly assigned to complete 2 preference assessment modules.
Kaplan RM, et al. Med Decis Making. 2019 Sep 26. doi: 10.1177/0272989X19873667.