Risk and Risk Perception of Knee Osteoarthritis in the US

Not Applicable

Completed

• Conditions: Knee Osteoarthritis
• Interventions: Behavioral: Generic osteoarthritis information; Behavioral: Internet-Based Osteoarthritis Risk Calculator

• Registration Number: NCT02704286
• Lead Sponsor: Brigham and Women's Hospital

Brief Summary

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.

Detailed Description

Not available

Study Timeline

• Study Start: 2015-04
• Primary Completion: 2015-05
• Study Completion: 2015-05
• Status Verified: 2016-03
• Study First Submitted: 2016-03-01
• Study First Submitted QC: 2016-03-04
• Last Update Submitted: 2016-03-04
• Study First Posted: 2016-03-10
• Last Update Posted: 2016-03-10

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 380

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 & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Generic Osteoarthritis Risk Information	Generic osteoarthritis information	Participants in this arm received generic osteoarthritis information that was not personalized.
Personalized Osteoarthritis Risk	Internet-Based Osteoarthritis Risk Calculator	Participants in this arm obtained their personalized osteoarthritis risk from the internet-based Osteoarthritis Risk Calculator.

Primary Outcome Measures

Name	Time	Method
Change in estimated lifetime knee OA risk	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.
Change in estimated 10-year knee OA risk	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.

Secondary Outcome Measures

Name	Time	Method
Reaching an Action Stage on Diet Contemplation Ladder	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.
Reaching an Action Stage on Exercise Contemplation Ladder	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.
Reaching an Action Stage on Weight Control Contemplation Ladder	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.