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Consent Forms in Cancer Research: Examining the Effect of Length on Readability

Consent Forms in Cancer Research: Examining the Effect of Length on Readability

Status
Completed
Phases
NA
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT04548063
Enrollment
266
Registered
2020-09-14
Start date
2020-09-08
Completion date
2020-11-06
Last updated
2024-08-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Cancer

Brief summary

Researchers are using mock consent forms to see if wordiness has any effect on patients' understanding and willingness to sign up for a cancer clinical trial.

Detailed description

This study will determine whether there is a relationship between wordiness of a consent form and whether or not the consent form helped the patient decide to enroll in a clinical trial. This study will also determine whether wordiness of a consent form is associated with patients' willingness to sign the consent form.

Interventions

OTHER6,000 word consent form

Mock consent form with consistent content in approximately 6,000 word length.

OTHER4,000 word consent form

Mock consent form with consistent content in approximately 4,000 word length.

OTHER2,000 word consent form

Mock consent form with consistent content in approximately 2,000 word length.

Sponsors

Mayo Clinic
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
OTHER
Masking
TRIPLE (Subject, Caregiver, Investigator)

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Patient-reported history of cancer * Patient is able to read English * Patient-reported age of 18 years or older

Exclusion criteria

* None

Design outcomes

Primary

MeasureTime frameDescription
Decision to enrollThrough study completion, approximately 1 hourNumber of participants to indicate on the self-reported patient questionnaire that the information provided in the consent form helped make a decision about whether or not to enroll in the trial. This is defined as a response of 1 or 2 on the Likert scale of 1=strongly agree and 5= strongly disagree for information in the consent form was helpful to the decision to join the study.

Countries

United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026