Lower extremity function in patients following hip arthroscopy and an asymptomatic control group. A cross-sectional comparison based on self- reported outcomes and performance based measures.

Abstract: Background: This study aimed to evaluate physical function, measured with self-reported outcomes and performance-based measures (PBMs), in patients 6-10 months following hip arthroscopy (HA) compared to an asymptomatic control group.   Methods: A cross-sectional comparison (21 patients, 22 controls) based on self-reported outcomes (HAGOS), range of motion (ROM), muscle strength and PBMs (The Y-balance test (cm), medial and lateral triple hop test (cm) and Illinois agility test (s)). Independent sample t test was performed to asses between-group differences.   Results: HA-patients reported significantly worse self-reported outcomes in all HAGOS subscales, greatest difference was in QoL (-37,3 (95% CI -47,9; -26,8) p<0.001). HA-patients also reported significantly lower results (p<0.05) in active and passive flexion (ROM) and external rotation (strength). No significant differences were observed regarding PBMs.   Conclusions: HA-patients reported significantly lower hip function following HA compared with the control group. Lower muscle strength and ROM were observed in patients however, few differences were significant. No significant differences were observed regarding PBMs. This could indicate that physical function is re-established in patients 6-10months after surgery or that tests were not sensitive enough to detect potential remaining functional limitations in this patient group.