Single-injection hyaluronic acid treatment demonstrates non-inferiority in the relief of symptomatic knee osteoarthritis: A randomized double-blind, multi-center controlled study

Objective: To compare two sodium hyaluronate formulations (HYMOVIS® ONE and MONOVISC®) for single intra-articular (IA) injection in patients with knee osteoarthritis pain. Methods: This randomized, controlled study included 347 subjects allocated to two treatment arms: HYMOVIS® ONE (n = 175) and MONOVISC® (n = 172). The primary endpoint assessed non-inferiority of HYMOVIS® ONE versus MONOVISC® based on change from baseline in the WOMAC LK3.1 A1 Pain subscale. Secondary outcomes evaluated patient response using OMERACT-OARSI criteria, changes in WOMAC stiffness and function scores, health-related quality of life (SF-12), global assessments by patients and clinicians, and rescue medication use. Results: The mean WOMAC LK3.1 A1 walking pain subscale score decreased significantly from baseline at week 12 in both groups, with reductions of 65 % for HYMOVIS® ONE and 66 % for MONOVISC®. At week 26, reductions were 73 % for HYMOVIS® ONE and 69 % for MONOVISC®. The non-inferiority test yielded a p-value of 0.0003. Clinically significant change from baseline was observed for all secondary endpoints. For the WOMAC LK3.1 Function subscale, the comparison between groups at week 26 showed a statistically significant difference (p = 0.0367) favoring HYMOVIS® ONE. Both treatments were well tolerated. Conclusions: A single injection of HYMOVIS® ONE was well tolerated and non-inferior to MONOVISC®, with improvements across all study endpoints maintained through 26 weeks, indicating sustained symptomatic relief of knee OA. Trial registration number: NCT06528600 (www.clinicaltrials.gov).