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A randomised controlled trial of a telephone-based weight management program for patients with knee osteoarthritis who are overweight or obese.

In patients with knee osteoarthritis, who are overweight or obese, does referral to a telephone-based weight management and coaching program, compared to usual care, decrease patient pain.

Status
Completed
Phases
Unknown
Study type
Interventional
Source
ANZCTR
Registry ID
ACTRN12615000490572
Enrollment
120
Registered
2015-05-18
Start date
2015-05-19
Completion date
2015-06-30
Last updated
2020-01-13

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

None listed

Brief summary

Excessive weight is the most significant behavioural risk factor leading to the onset and progression of knee osteoarthritis. Weight loss is recommended for all patients with knee osteoarthritis who are overweight or obese; however, this is rarely provided in clinical practice. This study will assess the effectiveness of a telephone-based weight management program in reducing weight and pain in patients with knee osteoarthritis who are overweight or obese. We hypotheses that patients receiving the telephone-based program will achieve an average weight loss of 5kg and an average decrease in pain score of 1.5 of 10 from baseline, compared to control patients receiving usual care.

Interventions

Patients will receive a telephone-based behaviour change intervention, focusing on weight reduction and the adoption of a healthy lifestyle program (referral to the 'Get Healthy Information and Coaching Service' (GHS)). The GHS offers 10 individually tailored coaching sessions delivered by university qualified health coaches over a 6-month period. Each coaching sessions is designed to provide ongoing support in maintaining participant motivation, overcoming barriers, setting goals and making pos

Patients will receive a telephone-based behaviour change intervention, focusing on weight reduction and the adoption of a healthy lifestyle program (referral to the 'Get Healthy Information and Coaching Service' (GHS)). The GHS offers 10 individually tailored coaching sessions delivered by university qualified health coaches over a 6-month period. Each coaching sessions is designed to provide ongoing support in maintaining participant motivation, overcoming barriers, setting goals and making positive and sustainable lifestyle and behaviour changes, regarding diet, physical activity, and achieving and maintaining a healthy weight. Coaching sessions are provided on a tapered schedule, with a higher intensity of calls occurring in the first 12 weeks of the program. However, the frequency of the telephone sessions are tailored to the participants individual needs. Printed support materials will be mailed to participants after the first telephone call, and will include an information booklet and a coaching journal. During the first telephone call, participants will complete a short health assessment and be asked about their current lifestyle habits and other information regarding their individual circumstances. The remaining 9 telephone calls provide information aimed to support participants to improve their dietary intake and physical activity and assist them in achieving and maintaining a healthy weight.

Sponsors

Hunter New England Population Health, Hunter New England Local Health District.
Lead SponsorGovernment body

Study design

Allocation
Randomised controlled trial
Intervention model
Parallel
Primary purpose
Treatment
Masking
Blinded (masking used) (Subject, Caregiver, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
All
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

Primary complaint of pain in the knee due to knee osteoarthritis. Aged 18 years or over. Classified as overweight or obese with a self-reported body mass index (BMI) between 27 or greater and less than 40. Have access to and can use a telephone. Duration of longer than 3 months since the onset of knee pain. Average back pain intensity of 3 or greater out of 10 over the past week on a numerical rating scale of 0 to 10. Moderate level of interference in activities of daily living (adaption of item 8 on SF-36).

Exclusion criteria

A known or suspected serious pathology as the underlying cause of knee pain, such as a fracture, infection, rheumatoid arthritis or malignancy (cancer). A previous history of obesity surgery. Currently participating in any prescribed, medically supervised or commercial weight loss program. Knee surgery in the last 6 months or planned surgery in the next 6 months. Inability to walk unaided. Unable to comply with the study protocol, adapt meals or exercise, due to non-independent living arrangements. Any medical or physical impairment, apart from knee pain, precluding safe participation in exercise such as uncontrolled hypertension, or morbid obesity (BMI >40). Cannot speak and read English.

Outcome results

None listed

Source: ANZCTR · Data processed: Mar 7, 2026