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Can patients diagnosed with schizophrenia complete choice-based conjoint analysis tasks?
John F P Bridges1, Elizabeth T Kinter, Annette Schmeding
1Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA. jbridges@jhsph.edu
The Patient
|October 15, 2011
Summary
Patients with schizophrenia can complete choice-based conjoint analysis, a method for understanding treatment preferences. This research demonstrates their ability to make meaningful trade-offs, informing future patient-centered care strategies.
Area of Science:
- Psychiatry
- Mental Health Research
- Patient-Reported Outcomes
Background:
- Schizophrenia is a severe mental illness impacting cognition and social functioning.
- Traditional research methods for treatment preferences are often perceived as too cognitively demanding for patients with schizophrenia.
- Hesitancy exists among researchers and funders to explore patient preferences due to these perceived cognitive burdens.
Purpose of the Study:
- To evaluate the feasibility of choice-based conjoint analysis (discrete-choice experiments) for patients diagnosed with schizophrenia.
- To determine if patients with schizophrenia can meaningfully engage in and complete conjoint analysis tasks.
- To assess whether patients with schizophrenia make significant trade-offs between different treatment attributes.
Main Methods:
- A study involving 21 German outpatients diagnosed with schizophrenia, aged 18-65, with at least one year of treatment and no acute symptoms.
- Conjoint analysis tasks were developed based on six attributes identified through literature review and focus groups.
- Interviews were conducted by a psychologist, with tasks presented and recorded for analysis to confirm respondent understanding and preference assessment via logistic regression.
Main Results:
- Evidence suggests that patients with schizophrenia can successfully complete choice-based conjoint analysis tasks.
- Participants related to presented scenarios and explicitly used personal preferences to make judgments.
- Statistical analysis confirmed hypotheses, with a supportive physician, reduced cognitive slowing, and improved stress management identified as key preferences.
Conclusions:
- Patients diagnosed with schizophrenia are capable of completing conjoint analysis tasks.
- Their decisions in these tasks are based on personal preferences.
- Schizophrenia patients demonstrate the ability to make trade-offs between various treatment attributes, supporting patient-centered research.
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