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Randomized Controlled Trial
. 2023 Nov 21;13(11):e075014.
doi: 10.1136/bmjopen-2023-075014.

Using SUpported Motivational InTerviewing (SUMIT) to increase physical activity for people with knee osteoarthritis: a pilot, feasibility randomised controlled trial

Emily Catherine Bell  1   2 , Paul O'Halloran  3 , Jason A Wallis  4   2   5 , Kay M Crossley  4 , Alison J Gibbs  4 , A Lee  6 , Sophie Jennings  2 , Christian J Barton  4
Affiliations
Randomized Controlled Trial

Using SUpported Motivational InTerviewing (SUMIT) to increase physical activity for people with knee osteoarthritis: a pilot, feasibility randomised controlled trial

Emily Catherine Bell et al. BMJ Open. .

Abstract

Objective: The objective of this study was to determine the feasibility and effectiveness of using SUpported Motivational InTerviewing (SUMIT) to increase physical activity in people with knee osteoarthritis (KOA).

Design: Randomised controlled trial.

Setting: We recruited people who had completed Good Life with osteoArthritis Denmark (GLA:D) from private, public and community settings in Victoria, Australia.

Interventions: Participants were randomised participants to receive SUMIT or usual care. SUMIT comprised five motivational interviewing sessions targeting physical activity over 10 weeks, and access to a multimedia web-based platform.

Participants: Thirty-two participants were recruited (17 SUMIT, 15 control) including 22 females (69%).

Outcome measures: Feasibility outcomes included recruitment rate, adherence to motivational interviewing, ActivPAL wear and drop-out rate. Effect sizes (ESs) were calculated for daily steps, stepping time, time with cadence >100 steps per minute, time in bouts >1 min; 6 min walk distance, Knee Osteoarthritis Outcome Score (KOOS) subscales (pain, symptoms, function, sport and recreation, and quality of life (QoL)), Euroqual, systolic blood pressure, body mass index, waist circumference, 30 s chair stand test and walking speed during 40 m walk test.

Results: All feasibility criteria were achieved, with 32/63 eligible participants recruited over seven months; with all participants adhering to all motivational interviewing calls and achieving sufficient ActivPAL wear time, and only two drop-outs (6%).12/15 outcome measures showed at least a small effect (ES>0.2) favouring the SUMIT group, including daily time with cadence >100 steps per minute (ES=0.43). Two outcomes, walking speed (ES= 0.97) and KOOS QoL (ES=0.81), showed a large effect (ES>0.8).

Conclusion: SUMIT is feasible in people with knee osteoarthritis. Potential benefits included more time spent walking at moderate intensity, faster walking speeds and better QoL.

Trial registration number: ACTRN12621000267853.

Keywords: knee; physical therapy modalities; rehabilitation medicine.

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Conflict of interest statement

Competing interests: None declared.

Figures

Figure 1
Figure 1
Study timeline. GLA:D, Good Life with osteoArthritis Denmark, SUMIT, SUpported Motivational InTerviewing.
Figure 2
Figure 2
(A) Forest plot comparing within group change scores between SUMIT and control groups. (B) Forest plot comparing within group change scores between SUMIT and control groups for health outcomes. EQ5D5L, Euroqual 5-Dimension 5-Level; IV, inverse variance; KOOS, Knee Osteoarthritis Outcome Score; SUMIT, SUpported Motivational InTerviewing.
See this image and copyright information in PMC

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