Platelet-rich plasma vs corticosteroids for elbow epicondylitis: A systematic review and meta-analysis

OBJECTIVE: The aim of this meta-analysis was to compare the effectiveness of platelet-rich plasma (PRP) vs corticosteroids for treatment of patients with lateral elbow epicondylitis. METHODS: A literature search was performed in EMBASE, Medline, the Cochrane Library and PubMed. Randomized controlled studies comparing PRP with corticosteroids for the treatment of epicondylitis were included. The Cochrane Collaboration's tool for assessing the risk of bias was used to evaluate the methodological quality of the included trials. The Cochrane Collaboration's Review Manager software was used to perform the meta-analyses. The overall effect size of each anesthetic was calculated as the weighted average of the inverse variance of the study-specific estimates. RESULTS: Seven randomized controlled trials were included in this review. The data from 2 studies were unavailable for meta-analysis, and the systematic review criteria were just achieved. Local corticosteroid injection yielded a significantly superior Disabilities of the Arm, Shoulder and Hand (DASH) score at 4 weeks (WMD, 11.90; 95% CI: 7.72 to 16.08; P < .00001; heterogeneity, χ(2) = 0, I(2) = 0%, P = 1.00) and 8 weeks (WMD, 6.29; 95% CI: 2.98 to 9.60; P = .0002, χ(2) = 0, I(2) = 0%, P = 1.00). Otherwise, it was noteworthy that a significantly lower VAS score (WMD, −2.61; 95% CI: −5.18 to −0.04; P = .05; heterogeneity, χ(2) = 29.85, I(2) = 97%, P < .00001) and DASH score (WMD, −7.73; 95% CI: −9.99 to −5.46; P < .00001, χ(2) = 0.20, I(2) = 0%, P = .66) existed in the PRP regimen than in the steroid regimen at the 24-week follow-up. More effective treatments were achieved in the PRP-treated patients than in the patients treated with corticosteroids (WMD, 3.33; 95% CI: 1.81 to 6.14; P = .000; heterogeneity, χ(2) = 0.43, I(2) = 0%, P = .51). CONCLUSIONS: Local corticosteroid injections demonstrated favorable outcomes compared with those of local PRP treatments for lateral elbow epicondylitis during the short-term follow-up period (4 weeks and 8 weeks post-treatment). Otherwise, at the long-term follow-up (24 weeks post-treatment), PRP injections had improved pain and function more effectively than corticosteroid injections.