Study Design Graphic

ATTACHMENT 2
Study Design Graphic

Primary Care
Clinics (n=4)

Screener

Eligible Men

Randomization

Study Design: Evaluation of an Online Prostate Cancer Screening Decision Aid

Informed Consent
Provider Survey
• Prostate cancer screening
practices
• Attitudes towards prostate
cancer screening
• Demographic characteristics

Recruiting Clinic
Partners
OMB
IRB
Cognitive Testing

Pre-Exposure Survey (n=900)
Administration timeline: Baseline
Administration mode: Web or telephone
Constructs measured:
• Demographic characteristics
• Prostate cancer experience
• Prostate cancer knowledge
• Health literacy
• Digital literacy
• Decisional conflict
• Autonomous decision-making
• Previous exposure to informational
materials about prostate cancer
screening

Arm 1. Nathan Decision Aid
(n=300)
Arm 2. MDPH Decision Aid
(n=300)
Arm 3. NCI PDQ® (n=300)

Usability Survey (n=300)
Administration timeline: Within 2 weeks of
reviewing Nathan
Administration mode: Web or telephone
Constructs measured:
• Nathan dosage
• Help needed to review Nathan
• Acceptability of Nathan
• Perceived fit of Nathan
• Usability of Nathan
• Technology acceptance
• COVID-19 impact and telemedicine
• Recommendations for Nathan
improvements
User Experience Interviews (n=30)
Administration timeline: Within 2 weeks of
reviewing Nathan
Administration mode: Telephone
Constructs measured:
• Nathan dosage
• Acceptability/perceived fit/usability of
Nathan
• Barriers/facilitators to Nathan use
• Digital literacy
• Recommendations for Nathan
improvements

Post-Exposure Survey (n=900)
Administration timeline: Immediately after review of
Nathan/MDPH/NCI PDQ®
Administration mode: Web or telephone
Constructs measured:
• Prostate cancer knowledge; Decisional conflict;
Autonomous decision-making; Decision self-efficacy;
Preparation for decision-making; Exposure to assigned
materials; Help needed to review assigned materials;
Contamination
Clinic Visit
Post-Clinic Visit Survey (n=900)
Administration timeline: Immediately after clinical encounter
with provider
Administration mode: Web or telephone
Constructs measured:
• Prostate cancer knowledge
• Decisional conflict
• Autonomous decision-making
• Shared decision-making
• Time spent with provider discussing PSA test
• Screening behavioral intent
• Screening behavior
• Informational materials used in making screening decision

Clinic Study Coordinator Interviews (n=4)
Administration timeline: At the close of the study
Administration mode: Telephone
Constructs measured:
• Barriers/facilitators/best practices to incorporating
Nathan into workflow