CClinicalTrials.gg
CompletedNCT03631758Updated Oct 19, 2023

Evaluating the Impact of Evidence-based Information About Mammography on Breast Cancer Screening Decisions

An interventional study of Evidence-based information and Patient Decision Aid in Breast Cancer, sponsored by McMaster University. Completed at 1 site in Canada. Open to female participants aged 40 Years to 49 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2023-10-19.

Sponsored by McMaster University · Not applicable, Interventional, and Screening

Phase
Not applicable
Study type
Interventional
Enrollment
209
Allocation
Randomized
Ages
40 Years to 49 Years
Sex
Female
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Study summary

Patient decision aids are tools that help guide individuals through a healthcare-related decision making process. They help users combine evidence-based information and recommendations by a health care provider with their personal needs, values and preferences. Through this project, Dr. Dobbins and her research team will explore whether the use of patient decision aids with high-quality and user-friendly summaries of research evidence, or summaries of research evidence alone, help to improve the quality of decision making by women facing breast cancer screening decisions.

Read the detailed description

Guidelines for breast screening in Canada are based on low-moderate quality evidence of effectiveness and screening is associated with potential harms. Patient Decision Aids (PDAs) are tools that assist users to understand treatment options, risks and benefits to align decisions with values and preferences. The investigators would now like to know whether use of a PDA alongside evidence-based information provided through the McMaster Optimal Aging Portal, or simply access to evidence-based information alone, can help users to make informed decisions about breast cancer screening in women.

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Conditions studied

  • Breast Cancer

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Keywords

  • Screening
  • Mammography
  • Patient Decision Aid
03

In context

Breast Neoplasms

12,544 studies on the registry are indexed under Breast Neoplasms; 2,892 are open to participants now.

This study's enrollment of 209 is above the median of 72 across 9,303 interventional studies indexed under Breast Neoplasms.

Browse Breast Neoplasms studies →

Lead sponsor

McMaster University is the lead sponsor of 720 studies on the registry; 124 are open to participants now.

Of its 6 completed or terminated interventional studies of FDA-regulated products, 2 (33%) have results posted.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
40 Years to 49 Years
Sexes eligible
Female
Accepts healthy volunteers
Yes

Inclusion criteria

  • English speaking women, 40-49 years old
  • Residents of British Columbia, Nova Scotia, and Prince Edward Island

Exclusion criteria

Exclusion Criteria:

  • History of breast cancer or mammography in the last 12 months
  • Classified as above-average risk for breast cancer (i.e., known genetic mutation linked to BC; no genetic testing, but a parent, sibling or child with a genetic mutation linked to BC; or received chest wall radiation before age 30)
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Study design

Phase
Not applicable
Primary purpose
Screening
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Triple (Participant, Investigator, Outcomes assessor)
Enrollment
209 participants (actual)

Study arms

  • Experimental
    Experimental: Evidence + PDA

    Evidence-based information on mammography such as blog posts, plain language evidence summaries and web resource ratings (quality-appraised online resources), plus a blog post on PDAs and the relevant decision aid from the Portal database

    Other: Evidence-based information · Behavioral: Patient Decision Aid

  • Experimental
    Evidence only

    The same evidence-based information as group 1 (Evidence + PDA), but without the PDA to quantify the effect of accessing evidence through the Portal alone

    Other: Evidence-based information

  • Sham comparator
    Attention control

    Information on how to distinguish high from low-quality health information, not specific to cancer screening or PDAs

    Other: Sham information

Interventions

  • OtherEvidence-based information

    Evidence-based information on mammography such as blog posts, plain language evidence summaries and web resource ratings (quality-appraised online resources).

  • BehavioralPatient Decision Aid

    Patient Decision Aid for breast cancer screening decision

  • OtherSham information

    Educational information not specific to mammography or cancer screening

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What researchers measure

Primary outcomes

  1. Decisional Conflict Scale

    A validated scale in which items are summed and scored to create a total score. Scores range from 0 to 100, with higher scores indicating higher decisional conflict.

    Time frame: Change from baseline to 6-mo

Secondary outcomes

  1. Decision quality

    Decision Quality Worksheet for Mammography

    Time frame: Change from baseline to 6-mo

  2. Preparation for Decision Making Scale

    A validated scale, items are summed and scored to create a score of 0-100. Higher scores indicate higher preparation for decision making

    Time frame: Change from baseline to 6-mo

  3. Screening behaviour

    Congruency between self-reported screening status and stated decision

    Time frame: Change from baseline to 6-mo

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Study locations

1 site
  • McMaster University
    Hamilton, Ontario L8P0A1, Canada
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References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Oct 19, 2023, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT03631758
Lead sponsor
McMaster University
Collaborators
Canadian Cancer Society (CCS)
Responsible party
Sponsor
First posted
Aug 15, 2018
Start date
Jan 1, 2019
Primary completion
Jan 31, 2020
Completion
Dec 1, 2020
Last update
Oct 19, 2023

Study contacts

Maureen Dobbins, RN, PhD
principal investigator · McMaster University

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Oct 2023. You cannot join it, but the record below documents what was studied.

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