[Intra-articular use of sodium hyaluronate (2,2,-2,7 MDa) in the treatment of Moroccan patients with knee osteoarthritis: randomized controlled trial].

OBJECTIVE: To assess the efficacy of intra-articular sodium hyaluronate, administred once weekly for 3 weeks (3 injections) in Moroccan patients with knee osteoarthritis over 6-month period.

MATERIAL AND METHODS: We prospectively studied the outcome of 75 patients with painful knee osteoarthritis in grade 1, 2 and 3 on ACR radiological criteria in our rheumatology clinic in Morocco. Group 1: 45 patients were treated with 3-weekly injections of intra-articular sodium hyaluronate (1%; 2,2-2,7 MDa). Group 2 : 30 patients treated with symptomatic slow-acting drugs for osteoarthritis (SYSADOA). The efficacy parameters were Visual Analogue Scale (VAS) and Lequesne index.

RESULTS: In group 1: 35/45 were female, a mean age of patients was 57.2 (± 8.2) years, and a mean Body Mass Index (BMI) was 28 (± 1.4) kg/m2. In group 2: 23/30 were female, a mean age of patients was 58.6 (± 2.8) years, and a mean of BMI was 27.8 (± 1.4) kg/m2. Before treatment in group 1, the mean of VAS was 6.5 cm (± 1), and of Lequesne index 10.5 (± 2.1). At 3 and 6 months after the third injection of sodium hyaluronate, there was a significant improvement from baseline of Lequesne index and VAS (P = 0.001). In group 2 before treatment, the mean of VAS was 7 cm (± 0,7), and of Lequesne index 8 (+ 1.1), but the improvement from baseline at 3 and 6 months of treatment was lower than group 1.

CONCLUSION: The results of this prospective study, showed the efficacy of 3-weekly injections of sodium hyaluronate in the treatment of knee osteoarthritis in Moroccan patients over a 6-month period.