Keywords:radial shock wave therapy, ultrasound, knee osteoarthritis
Objectives: To compare the effectiveness of radial shock wave therapy (RSWT) versus ultrasound therapy (US) on pain reduction in patients with knee osteoarthritis (OA)
Study design: Randomized controlled trial Setting: Department of Rehabilitation Medicine, Faculty of Medicine
Subjects: Thirty-two OA knee patients with knee pain (visual analogue scale ≥5 cm.), during January – August 2015.
Methods: The recruited patients were randomized equally into 2 groups. Radial shock wave therapy group received RSWT once a week and US group received US therapy 3 times a week for 4 weeks. Both groups performed quadriceps exercise twice a day. Pain score (VAS) on walking and WOMAC score were
assessed at baseline and 4 weeks.
Results: Subjects were 29 females and 3 males. The demographic data including sex, age, body mass index, prior treatment, baseline VAS pain and WOMAC scores were not different between groups. However, the mean symptom duration of the RSWT group was longer than ultrasound group (5.12±3.65 and 2.66±2.33 years, p=0.01). At 4 weeks, both groups showed a signifi cant reduction in VAS pain and WOMAC scores (p< 0.001). Although the VAS pain score after treatment of the RSWT group was lower than the US group 0.25 (95% confi dence interval = -0.89 to 1.39, p=0.65) and the WOMAC score after treatment of the RSWT group was lower than the US group 5.40 (-1.76 to12.56, p=0.13), there was no signifi cant difference between
groups. Moreover, compliance of quadriceps exercise, and number of paracetamol and ibuprofen taken showed no signifi cance difference between groups (p>0.05).
Conclusion: Both RSWT and US therapy combined with quadriceps exercises were effective on pain reduction and functional improvement in patients with knee osteoarthritis with no signifi cant difference between groups.
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