Risk and Risk Perception of Knee Osteoarthritis in the US

March 4, 2016 updated by: Elena Losina, Brigham and Women's Hospital

Raising Awareness of Knee Osteoarthritis (OA) and Willingness to Undertake Behavioral Changes to Reduce Risk of Knee OA: Online Recruitment

The investigators have created an interactive knee osteoarthritis (OA) risk calculator that estimates a user's risk of developing symptomatic knee OA as well as the user's risk for undergoing a total knee replacement (TKR) within their lifetime. To test the impact of the calculator, the investigators recruited OA-free subjects from Amazon's Mechanical Turk. Participants were randomized to either access general information about OA or use the risk calculator in addition to accessing general OA information. The investigators hypothesized that participants randomized to the risk calculator arm would have more accurate perception of their knee OA risk and would have increased willingness to change risky behavior compared to the general OA information group.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

380

Phase

  • Not Applicable

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

25 years to 45 years (Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Participants must be between the ages of 25 and 45
  • Participants must live in the United States
  • Participants must not be diagnosed with osteoarthritis

Exclusion Criteria:

  • All participants who did not meet the inclusion criteria

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Sham Comparator: Generic Osteoarthritis Risk Information
Participants in this arm received generic osteoarthritis information that was not personalized.
Behavioral: Generic osteoarthritis information
Subjects viewed generic (i.e. not personalized) information about osteoarthritis risk factors
Experimental: Personalized Osteoarthritis Risk
Participants in this arm obtained their personalized osteoarthritis risk from the internet-based Osteoarthritis Risk Calculator.
Behavioral: Internet-Based Osteoarthritis Risk Calculator
The investigators have developed a personalized risk calculator for knee osteoarthritis. This risk calculator uses the Osteoarthritis Policy Model to estimate an individual's risk of developing knee osteoarthritis within their lifetime based on demographic information and risk factors. It shows this information to the user with interactive graphs and compares their risk to the risk of an average American of the same age.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Change in estimated lifetime knee OA risk
Time Frame: 1 day
The difference between average lifetime knee osteoarthritis risk estimated by participants at baseline and average lifetime knee osteoarthritis risk estimated by participants after the intervention.
1 day
Change in estimated 10-year knee OA risk
Time Frame: 1 day
The difference between average 10-year knee osteoarthritis risk estimated by participants at baseline and average 10-year knee osteoarthritis risk estimated by participants after the intervention.
1 day

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Reaching an Action Stage on Diet Contemplation Ladder
Time Frame: 1 day
The percentage of subjects who originally ranked themselves below an action stage (8 or higher) on a contemplation ladder for changing diet related behaviors and who moved to an action stage after the intervention.
1 day
Reaching an Action Stage on Exercise Contemplation Ladder
Time Frame: 1 day
The percentage of subjects who originally ranked themselves below an action stage (8 or higher) on a contemplation ladder for changing exercise related behaviors and who moved to an action stage after the intervention.
1 day
Reaching an Action Stage on Weight Control Contemplation Ladder
Time Frame: 1 day
The percentage of subjects who originally ranked themselves below an action stage (8 or higher) on a contemplation ladder for changing weight control behaviors and who moved to an action stage after the intervention.
1 day

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Brigham and Women's Hospital

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

April 1, 2015

Primary Completion (Actual)

May 1, 2015

Study Completion (Actual)

May 1, 2015

Study Registration Dates

First Submitted

March 1, 2016

First Submitted That Met QC Criteria

March 4, 2016

First Posted (Estimate)

March 10, 2016

Study Record Updates

Last Update Posted (Estimate)

March 10, 2016

Last Update Submitted That Met QC Criteria

March 4, 2016

Last Verified

March 1, 2016

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 2015P000249

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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