Task shifting in the care for patients with hand osteoarthritis. Protocol for a randomized controlled non-inferiority trial

Ingvild Kjeken, Kjetil Bergsmark, Ida K Haugen, Toril Hennig, Merete Hermann-Eriksen, Vivian Tryving Hornburg, Åshild Hove, Anne Prøven, Trine Amalie Sjøvold, Barbara Slatkowsky-Christensen, Ingvild Kjeken, Kjetil Bergsmark, Ida K Haugen, Toril Hennig, Merete Hermann-Eriksen, Vivian Tryving Hornburg, Åshild Hove, Anne Prøven, Trine Amalie Sjøvold, Barbara Slatkowsky-Christensen

Abstract

Background: Current health policy states that patients with osteoarthritis (OA) should mainly be managed in primary health care. Still, research shows that patients with hand OA have poor access to recommended treatment in primary care, and in Norway, they are increasingly referred to rheumatologist consultations in specialist care. In this randomized controlled non-inferiority trial, we will test if a new model, where patients referred to consultation in specialist health care receive their first consultation by an occupational therapy (OT) specialist, is as safe and effective as the traditional model, where they receive their first consultation by a rheumatologist. More specifically, we will answer the following questions: 1. What are the characteristics of patients with hand OA referred to specialist health care with regards to joint affection, disease activity, symptoms and function? 2. Is OT-led hand OA care as effective and safe as rheumatologist-led care with respect to treatment response, disease activity, symptoms, function and patient satisfaction? 3. Is OT-led hand OA care equal to, or more cost effective than rheumatologist-led care? 4. Which factors, regardless of hand OA care, predict improvement 6 and 12 months after baseline?

Methods: Participants will be patients with hand OA diagnosed by a general practitioner and referred for consultation at one of two Norwegian departments of rheumatology. Those who agree will attend a clinical assessment and report their symptoms and function in validated outcome measures, before they are randomly selected to receive their first consultation by an OT specialist (n = 200) or by a rheumatologist (n = 200). OTs may refer patients to a rheumatologist consultation and vice versa. The primary outcome will be the number of patients classified as OMERACT/OARSI-responders after six months. Secondary outcomes are pain, function and satisfaction with care over the twelve-month trial period. The analysis of the primary outcome will be done by logistic regression. A two-sided 95% confidence interval for the difference in response probability will be formed, and non-inferiority of OT-led care will be claimed if the upper endpoint of this interval does not exceed 15%.

Discussion: The findings will improve access to evidence-based management of people with hand OA.

Trial registration: ClinicalTrials.gov, NCT03102788. Registered April 6th, 2017, https://ichgcp.net/clinical-trials-registry/NCT03102788?term=Kjeken&draw=2&rank=1 Date and version identifier: December 17th, 2020. First version.

Keywords: Assistive devices; Cost-effectiveness; Exercises; Hand osteoarthritis; Occupational therapy; Orthoses.

Conflict of interest statement

The authors declare that they have no competing interests.

Figures

Fig. 1
Fig. 1
Treatment pyramid for people with hand osteoarthritis. Illustration by Anne Therese Tveter ©
Fig. 2
Fig. 2
CONSORT flow diagram

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