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Measuring preferences for schizophrenia outcomes with the time tradeoff method
Martha Shumway1, Tandy L Chouljian, Cynthia L Battle
1Department of Psychiatry, UCSF/SFGH, 2727 Mariposa St, Suite 100, San Francisco, CA 94110, USA. shumway@itsa.ucsf.edu
The Journal of Behavioral Health Services & Research
|January 6, 2005
Summary
The Time Tradeoff (TTO) technique for measuring schizophrenia outcomes showed poor feasibility and efficiency. Tailoring the TTO format did not improve clinician ratings, indicating it is not well-suited for this patient population.
Area of Science:
- Health Economics
- Psychiatric Research
- Patient-Reported Outcomes
Background:
- Measuring patient preferences for health outcomes is crucial for treatment evaluation.
- The Time Tradeoff (TTO) is a common method for assessing health state preferences.
- Previous research suggests TTO may be less effective for schizophrenia outcomes.
Purpose of the Study:
- To test if tailoring the TTO's time frame and simplifying its format improves feasibility and efficiency for schizophrenia.
- To evaluate clinician perceptions of TTO suitability for schizophrenia treatment outcomes.
Main Methods:
- Forty clinicians completed TTO ratings using four different format/time frame combinations.
- Feasibility and efficiency were assessed using quantitative and qualitative measures.
- Logical consistency of ratings was also analyzed.
Main Results:
- Clinicians preferred a simpler TTO presentation format.
- No tested alterations significantly improved the TTO's feasibility or efficiency.
- Clinician ratings exhibited logical inconsistencies and were perceived as confusing.
Conclusions:
- Standard TTO adaptations do not enhance its suitability for measuring schizophrenia outcomes.
- The TTO technique appears poorly suited for assessing schizophrenia treatment preferences.
- Further research is needed to develop effective preference measurement tools for schizophrenia.