Study reveals how donor heart acceptance rates influence hospital preferences
NCT ID NCT04133831
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tested how presenting heart transplant center data—specifically donor acceptance rates—affects which hospital laypeople choose. Over 1000 participants from Amazon Mechanical Turk viewed different formats of outcome statistics and chose between a hospital that accepts most donor hearts and one that is more selective. The goal was to see if showing acceptance rates changes preferences, helping improve how transplant data is shared with patients.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- What this could lead to
- If successful, this could help design better ways to present transplant center data to patients and families, making their choices more informed.
- What could go wrong
- This is a small online survey, not a clinical treatment trial. Results may not reflect real-world decision-making or improve actual patient outcomes.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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1,019 people
The number who actually took part.
- Started
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Nov 2019
- Finished
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Apr 2020
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: Participants who are already qualified mTurk workers with Worker Accounts meeting the above criteria will be asked to participate if they confirm the following inclusion criteria in the consent form. 1. 18 years of age or older 2. must read and understand the information in the consent form 3. must want to participate in the research and continue with the survey 4. must live in United States Exclusion Criteria: 1. Participants on mTurk will not be allowed to participate if they fail to pass the initial "bot screening", a multiple-choice question that asks, "What phone number should you dial when there is an emergency?" The obvious correct response in this screening question is "911", so participants who select one of the incorrect responses (i.e. "1-800-ANTIBOT", "1-877-MTURKER", "123") are filtered out and not allowed to complete the survey. 2. Participants on mTurk will be allowed to participate, but excluded from data analysis, if they submit a nonsense response to the free-response question which reads, "In your own words, why do you think patients should choose the hospital you picked?" This question takes place after the participant has viewed the choice stimuli and selected their response. If participants input nonsense in the text response box, they will be permitted to complete the survey and paid, but filtered out from the data analysis.
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As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Carnegie Mellon University
Pittsburgh, Pennsylvania, 15213, United States
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