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Three sessions of radial extracorporeal shockwave therapy gives no additional benefit over "minimal-dose" radial extracorporeal shockwave therapy for patients with chronic greater trochanteric pain syndrome: a double-blinded, randomized, controlled trial |
Wheeler PC, Dudson C, Calver R, Goodall D, Gregory KM, Singh H, Boyd KT |
Clinical Journal of Sport Medicine 2022 Jan;32(1):e7-e18 |
clinical trial |
9/10 [Eligibility criteria: Yes; Random allocation: Yes; Concealed allocation: Yes; Baseline comparability: Yes; Blind subjects: Yes; Blind therapists: No; Blind assessors: Yes; Adequate follow-up: Yes; Intention-to-treat analysis: Yes; Between-group comparisons: Yes; Point estimates and variability: Yes. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed* |
OBJECTIVE: To investigate the outcomes following 3 weekly sessions of radial extracorporeal shockwave therapy (rESWT) in patients with chronic greater trochanteric pain syndrome (GTPS) presenting to an NHS Sports Medicine Clinic in the United Kingdom. DESIGN: Double-blinded randomized controlled trial. SETTING: A single NHS Sports Medicine Clinic, in the United Kingdom. PATIENTS: One hundred twenty patients in an NHS Sports Medicine clinic presenting with symptoms of GTPS who had failed to improve with a minimum of 3 months of rehabilitation were enrolled in the study and randomized equally to the intervention and treatment groups. Mean age was 60.6 +/- 11.5 years; 82% were female, and the mean duration of symptoms was 45.4 +/- 33.4 months (range 6 months to 30 years). INTERVENTIONS: Participants were randomized to receive either 3 sessions of ESWT at either the "recommended"/"maximally comfortably tolerated" dose or at "minimal dose." All patients received a structured home exercise program involving flexibility, strength, and balance exercises. MAIN OUTCOME MEASURES: Follow-up was at 6 weeks, 3 months, and 6 months. Outcome measures included local hip pain, validated hip PROMs (Oxford Hip Score, Non-arthritic Hip Score, Victorian Institute of Sport Assessment Questionnaire), and wider measures of function including sleep (Pittsburgh Sleep Quality Index) and mood (Hospital Anxiety and Depression Scale). RESULTS: Results were available for 98% of patients at the 6-month period. There were statistically significant within-group improvements in pain, local function, and sleep seen in both groups. However, fewer benefits were seen in other outcome measures, including activity or mood. CONCLUSION: There were no time x group interaction effects seen between the groups at any time point, indicating that in the 3 sessions, the "recommended-dose" rESWT had no measurable benefit compared with "minimal dose" rESWT in this group of patients with GTPS. The underlying reason remains unclear; it may be that rESWT is ineffective in the treatment of patients with chronic GTPS, that "minimal dose" rESWT is sufficient for a therapeutic effect, or that a greater number of treatment sessions are required for maximal benefit. These issues need to be considered in further research.
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