Clinical response to intra-articular injections of hylan G-F 20 in symptomatic hip osteoarthritis: the OMERACT-OARSI criteria applied to the results of a pilot study.

Objective: To assess, using the OMERACT-OARSI criteria, the clinical response of patients presenting with symptomatic hip osteoarthritis (OA) to one intra-articular injection of hylan G-F 20.

Methods: Open-label, multi-centre, prospective, pilot study. Fifty-six patients presenting with primary hip OA, Kellgren-Lawrence grade II-III, age > or =40, with walking pain measuring 50-90 mm on a 100 mm visual analogue scale (VAS).