Digital Motivation to Decrease Inactive Behaviour in Patients With Knee Osteoarthritis

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT03339011
Recruitment Status : Completed
First Posted : November 9, 2017
Last Update Posted : August 2, 2018
Information provided by (Responsible Party):
Marius Henriksen, Frederiksberg University Hospital

November 7, 2017
November 9, 2017
August 2, 2018
November 14, 2017
July 29, 2018   (Final data collection date for primary outcome measure)
Change from baseline in physical inactivity [ Time Frame: 6 weeks ]
Physical inactivity is measured using an accelerometer based activity monitor. Physical activity is defined as time (in minutes) spent inactive, i.e. lying, sitting, standing during a day.
Same as current
Complete list of historical versions of study NCT03339011 on Archive Site
  • Change form baseline in the Knee Injury and Osteoarthritis Outcome Score (KOOS) [ Time Frame: 6 weeks ]
    The Knee injury and Osteoarthritis Outcome Score (KOOS) questionnaire is used to assess patient reported outcomes on pain, function, and quality of life.
  • Transition questionnaire (TRANS-Q) of perceived change in knee symptoms [ Time Frame: 6 weeks ]
    To investigate if participants experience a change in their osteoarthritis symptoms over time, they will be asked: "Pleas answer if you feel that your osteoarthritis symptoms have change for either the better, worse or no changes compared to before you entered this study" at the follow-up visit. The Participants can then check a box say: not change, a change for the worse or change for the better
  • Self-reported change in physical inactivity [ Time Frame: 6 weeks ]
    At the follow-up visit participants will be asked "Have you changed your physical activity behaviour after completing the motivational intervention". This question will be asked at the end of the intervention period to investigate if the objective measurement of sedentary behaviour is related to the participants own perceived behaviour.
Same as current
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Digital Motivation to Decrease Inactive Behaviour in Patients With Knee Osteoarthritis
Effectiveness of Text Messages for Decreasing Inactive Behavior in Patients With Knee Osteoarthritis: a Pilot Randomised Controlled Study

Physical inactivity is a major risk behaviour with a potential for causing premature death, particularly among people with mobility limitations, such as knee osteoarthritis.

Digital motivational interventions (such as SMS) can motive to a healthy behaviour including increased physical activity.

The purpose of this study is to investigate if motivational text messages following an exercise intervention to improve mobility limitations will change the physical activity level in patients with knee osteoarthritis.

This study is designed as pilot randomized controlled trial, with equal randomization (1:1). Eligible participants will be randomised into one of two groups (intervention or control) after completing their baseline measurements. The intervention group will receive weekly motivational text messages and the control group will not receive any attention from the study.

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Not Applicable
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single (Outcomes Assessor)
Primary Purpose: Supportive Care
Knee Osteoarthritis
Behavioral: Motivational SMS text message
Motivational text messages delivered to the participants' mobile phones. The text messages contain motivational text and advice on physical activity.
  • Experimental: SMS text message

    The content of the text messages is developed based on recommendation and advice from the Danish Health Authority about the importance of regular daily physical activity.

    For 6 weeks, the text messages will be send three times per week, twice during the week days and once in the weekend, based on previous experience with SMS as motivation for chronic pain patients.

    Intervention: Behavioral: Motivational SMS text message
  • No Intervention: No intervention
    No attention from the study
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*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
July 29, 2018
July 29, 2018   (Final data collection date for primary outcome measure)

Inclusion Criteria:

  • Age ≤18
  • Diagnosed with knee osteoarthritis
  • Owner of a smart phone or tablet
  • Have just finished an exercise program for knee osteoarthritis

Exclusion Criteria:

  • Not able to read and understand Danish
  • Any condition, which in the opinion of the investigator would put the subject at increased safety risk by participation, or otherwise make the subject unsuitable for this study.
Sexes Eligible for Study: All
18 Years and older   (Adult, Older Adult)
Contact information is only displayed when the study is recruiting subjects
Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No
Plan to Share IPD: Undecided
Marius Henriksen, Frederiksberg University Hospital
Marius Henriksen
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Not Provided
Frederiksberg University Hospital
August 2018

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP