Results of the learning curve for interventional hip arthroscopy: a prospective study.

This prospective study aims to explore hip arthroscopy, outcome and the effect of the learning curve. Using the non-arthritic hip score preoperatively and postoperatively in 120 patients with an average 23-month follow-up, a median improvement of 16 points was seen at 6 months (p < 0.0001, Wilcoxon's signed ranks) remaining at 2 years (15, p < 0.05). Dividing patients into consecutive chronological groups of 40, the learning curve was explored. At six-months scores improved by 12 (p < 0.05) in first 40, 15 (p < 0.0001) in second and 20 (p < 0.0001) in third. A reduction in THR (22.5%, 5%, 2.5%) and revision rates (10%, 7.5%, 0) was seen. An increase in cumulative percentage satisfaction (defined as minimum 10 points increase) was seen from 20th (45%) to 100th procedure (65%). Results significantly improve as experience increases, possibly due to improved surgical skill, preoperative workup or improved understanding of operative indications.