Abstract
The study aimed to determine the effectiveness of monthly intra-articular injection of combination of PRP and hyaluronic acid in improvement of outcome of knee OA. It was conducted as open clinical trial on a convenient sample of 17 patients with unilateral or bilateral symptomatic knee OA in rheumatology and orthopedic clinics at Al-Jumhoori Teaching Hospital in Mosul, Iraq during 1st of Jan to 30th Jun, 2018. The patients received intra-articular injection of combination of plate rich plasma (PRP) and hyaluronic acid (HA) monthly for three months. The outcome assessment was carried out 4 weeks after the last injection using WOMAC index. The results revealed that WOMAC index subscales was reduced significantly (p <0.001) after treatment by followings mean differences: 3.88 in pain (95% CI: 3.18-4.58); 1.29 in stiffness (95% CI: 0.85-1.73); 9.29 in physical function (95% CI: 6.70-11.88); and 14.47 in total score (95% CI: 11.20-17.73). The intervention effect size were as follows: 1.23 in pain; 1.49 in stiffness; 1.11 in physical function, and 1.20 in total WOMAC score. Overall, effect size of combination of PRP and HA intra-articular injection is classified as large effect size (> 0.8) in improving outcome of knee OA. A combination of PRP and HA has large synergistic effect size in improving outcome of moderate and severe OA of knee.
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