Significant improvements in pain after a six-week physiotherapist-led exercise and education intervention, in patients with osteoarthritis awaiting arthroplasty, in South Africa: a randomised controlled trial

M M Saw, T Kruger-Jakins, N Edries, R Parker, M M Saw, T Kruger-Jakins, N Edries, R Parker

Abstract

Background: A major challenge facing those with late stage osteoarthritis is delayed surgery due to waiting lists. In South Africa patients wait years for a hip/knee arthroplasty. Affected patients require effective management to address their pain, especially while awaiting surgery. Existing literature is mostly available from high income countries exploring effects of interventions during short waiting periods. Research is warranted in low income countries where long waiting periods are common. This study explored the effects of a six-week physiotherapist-led exercise and education intervention on pain in this population.

Methods: A randomised controlled trial was performed at two public hospitals in South Africa. Ethical approval and informed consent was obtained. 74 participants from arthroplasty waiting lists were randomly allocated to an intervention (n = 35) or control group (n = 39). The intervention included six physiotherapist-led group-based sessions (two hours/week of education, exercise and relaxation). The control group received usual care. Data collection was conducted by blinded physiotherapists at baseline, week six, 12 and month six. The primary outcome was pain, measured by the Brief Pain Inventory. Additionally, participants completed an open-ended questionnaire at month six, to gain insight regarding the intervention. Analysis was by intention to treat using two-way analysis of variance and post-hoc Tukey comparisons. Answers to subjective questions were analysed according to common themes that emerged.

Results: The intervention group had significant improvements compared with the control group with moderate to large effect sizes (ES) on pain severity [week 6: p < 0.01, ES = 0.94, 95 % CI (0.45,1.41), month 6: p = 0.02. ES = 0.74, 95 % CI (0.26,1.2)] and moderate to large effects on pain interference [week 6: p < 0.01, ES = 1.2, 95 % CI (0.70,1.69), week 12: p = 0.04, ES = 0.68, 95 % CI (0.20,1.14), month 6: p < 0.01, ES = 0.98, 95 % CI (0.49,1.45)]. 53 % of participants reported that the intervention improved their pain.

Conclusions: The intervention resulted in sustained significant improvements in pain severity and interference in patients with hip/knee osteoarthritis, awaiting arthroplasty compared with a control group. Additionally, participants' individual feedback supported observed significant improvements in pain. Such an intervention appears to be effective in managing pain in this population and should be incorporated into practice for appropriate patients. Further research is being conducted to explore long term and postoperative outcomes.

Clinical trial registration: Pan African Clinical Trial Registry, PACTR201409000885765 , PACTR201507001186115 .

Keywords: Arthroplasty/joint replacement; Chronic pain; Education; Exercise; Hip/knee osteoarthritis; Physiotherapy; Waiting list.

Figures

Fig. 1
Fig. 1
Recruitment and randomisation process
Fig. 2
Fig. 2
Data collection process
Fig. 3
Fig. 3
Pain severity score (N = 74)
Fig. 4
Fig. 4
Pain interference score (N = 74)

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