Informed Consent Formats by Information Preference and Priority
- Conditions
- AsthmaConsent Forms
- Interventions
- Behavioral: Original consent formBehavioral: Shortened consent formBehavioral: Interactive, shortened consent formBehavioral: Reordered, shortened consent formBehavioral: Shortened consent form with a highlights box
- Registration Number
- NCT03416907
- Lead Sponsor
- Carnegie Mellon University
- Brief Summary
This study will test whether different formats of medical informed consent documents can help improve understanding and confidence in decision-making for clinical trials. The study will be primarily run through an online survey.
- Detailed Description
The goal of this study is to investigate whether the same information can be communicated in different formats of an informed consent document in ways that improve participant understanding and confidence. Participants will review one of several different versions of the same informed consent document, and will be asked to complete a survey after reading the documents. The survey will ask participants their willingness to enroll in the clinical trial discussed in the document and their confidence in their decision. The survey will also test participants recollection of information from the informed consent document. Researchers will look at this data to see if there are ways to improve knowledge about the clinical trial and confidence in decisions without necessarily changing enrollment preferences.
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 500
- 18 Years Old or Older
- Read and agreed to informed consent
- Indicated desire to participate
- Diagnosed with asthma
- US resident
- Participants from whom we receive multiple responses will be dropped from analysis (but will be compensated for participation)
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- PARALLEL
- Arm && Interventions
Group Intervention Description Original Original consent form Participants will review the full-length, original consent form for the clinical trial. Shortened Shortened consent form Participants will review a shortened consent form for the clinical trial, which includes only material indicated as important by 2/3 of participants from a previous study. Interactive Interactive, shortened consent form Participants will review an interactive, shortened consent form, where hyperlinks to different sections of the consent form are provided. The landing page includes the introductory section. Reordered Reordered, shortened consent form Participants will review a reordered, shortened consent form. This form is based on the shortened consent form, but the sections are reordered based on a previous study, such that sentences previously rated as more likely to impact a participant's decision is more likely to be presented first (except for an initial introductory section). Highlighted Shortened consent form with a highlights box Participants will review a shortened consent form with a highlights box, where the highlights box includes the 10 sentences rates as most likely to impact a participant's decision from a previous study.
- Primary Outcome Measures
Name Time Method Score for high impact questions through study completion, an average of 30 minutes Sum of correct answers (T/F) for any item relating to material that was rated as 50 or higher on impact on willingness to enroll in a previous study.
- Secondary Outcome Measures
Name Time Method Perception of investigator transparency through study completion, an average of 30 minutes Likert measure of participants belief that the investigator is trying to communicate information about the trial accurately
Interaction effect of format and importance on likelihood of correct answer through study completion, an average of 30 minutes Interaction effect in a logistic regression predicting a correct answer, based on the format of the consent form and the importance of the answer.
Scores for different information categories through study completion, an average of 30 minutes Sum of correct answers (T/F) for each of the 20 information categories
Effect of location on score through study completion, an average of 30 minutes Logistic regression coefficient of likelihood of predicting a correct answer, based upon the location on which the sentence appeared--uses only the shortened, and the reordered conditions. Note that sentences appearing in the introduction (which is the first section of all treatments) must be dropped, as there will be no variation in location.
Decision to enroll through study completion, an average of 30 minutes Likert measure of participants hypothetical decision to enroll in the study
Confidence in enrollment decision through study completion, an average of 30 minutes Likert measure of participants confidence in hypothetical decision to enroll in the study
Satisfaction with consent structure through study completion, an average of 30 minutes Likert measure of participants satisfaction with the consent form
Score for low impact questions through study completion, an average of 30 minutes Sum of correct answers (T/F) for any item relating to material that was rated as 49 or lower on impact on willingness to enroll in a previous study.
Total score for all questions through study completion, an average of 30 minutes Sum of correct answers (T/F) on full knowledge test.
Perception of investigator concern for well being through study completion, an average of 30 minutes Likert measure of participants belief in the investigator's concerns for the participant's well-being
Participant's probability estimate of the likelihood that the treatment would help control their asthma through study completion, an average of 30 minutes Survey question of the following form:
'If you enrolled in the trial described in the consent form, what is the probability that the treatment could help control your asthma better, where 0% means "no chance at all of helping" and 100% means "would definitely help"?'
Participants provided with drop-down menu including values from 0% to 100% in increments of 1%.
Trial Locations
- Locations (1)
Carnegie Mellon University
🇺🇸Pittsburgh, Pennsylvania, United States