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A Methodological Study to Compare Alternative Modes of Administration With Value EQ-5D Using Preference-Elicitation

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Summary

Interviewer-assisted surveys provide more reliable time trade-off (TTO) data than unassisted online surveys. Discrete choice experiment (DCE) data reliability is unaffected by administration mode, with face-to-face and remote-assisted interviews yielding similar quality data.

Keywords:
discrete choice experiencemode of administrationonline surveyremote-assisted interviewtime trade-off

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Area of Science:

  • Health Economics
  • Patient-Reported Outcomes
  • Survey Methodology

Background:

  • Preference-elicitation techniques like time trade-off (TTO) and discrete choice experiments (DCE) are crucial for health valuation.
  • These methods can be administered via face-to-face (F2F), unassisted online (UO), or remote-assisted (RA) modes.

Purpose of the Study:

  • To investigate the impact of administration mode on the quality and reliability of preference-elicitation data.
  • To compare data from F2F, UO, and RA surveys for TTO and DCE methods.

Main Methods:

  • EQ-5D-5L health states were valued using composite TTO (cTTO) and DCE in the UK general population.
  • Participants were assigned to groups completing F2F/UO or RA/UO surveys.
  • Feasibility, reliability, and face-validity were assessed across administration modes.

Main Results:

  • Unassisted online (UO) surveys provided less reliable composite TTO (cTTO) data and less guidance compared to assisted modes (F2F, RA).
  • Discrete choice experiment (DCE) data reliability was consistent across all administration modes.
  • Face-validity was demonstrated for cTTO data in all modes, though UO yielded higher utilities for moderate/severe states.

Conclusions:

  • Interviewer-assisted modes (F2F, RA) enhance the reliability of cTTO data compared to UO surveys.
  • DCE data reliability remains unaffected by the mode of administration.
  • Both F2F and RA interview modes yield comparable, high-quality data.