Summary

This study reported a minimum 5-year follow up of patient reported outcome measurement scores, clinical benefit, and return to dance in dancers who underwent primary hip arthroscopy.

Abstract

Background

There is a paucity of literature surrounding the mid-term outcomes in dancers following primary hip arthroscopy.

Purpose

To report a minimum 5-year follow-up patient-reported outcome measurement scores (PROMS), clinical benefit, and return to dance in dancers who underwent primary hip arthroscopy.

Methods

All primary hip arthroscopy data was prospectively collected and retrospectively reviewed for dancers was recorded between May 2010 and June 2016. Patients were eligible if they indicated they participated in dance one year prior to surgery at the professional, college, high school, organized amateur, or recreational level and had preoperative and minimum 5-year follow-up scores for the modified Harris Hip Score (mHHS), Nonarthritic Hip Score (NAHS), Hip Outcome Score – Sports Specific Subscale (HOS-SSS), and Visual Analog Scale for pain (VAS). Dancers were excluded if they were unwilling to participate, had a previous hip condition (i.e. hip dysplasia (lateral-center-edge angle (LCEA) < 18°), underwent previous surgery on ipsilateral hip, or had a Tönnis osteoarthritis grade > 1. The minimal clinically important difference (MCID), patient acceptable symptomatic state (PASS), and maximum outcome improvement satisfaction threshold (MOI) were used to evaluate patient postoperative satisfaction and improvement.

Results

Fifty-two hips (49 dancers ) (82.5%) had minimum 5-year follow-up. The average age of the cohort was 30.0 ± 17.1 years, and all patients were female. The average follow-up time was 79.1 ± 23.2 months. Dancers significantly improved in all PROMS (P < 0.001). Additionally, they had a high rate of satisfaction of 8.4 ± 2.1 at minimum 5-year follow-up. They achieved high rates of MCID for the mHHS, NAHS and VAS for pain, 83.3%, 85.7% and 85.7%, respectively and high rates of PASS for the mHHS, and iHOT-12, 90.5% and 81.0%, respectively. Six dancers (14.3%) underwent revision hip arthroscopy and three dancers (5.8%) converted to total hip arthroplasty. The rate to return to dance was 79.1%. At minimum 5-year follow-up 89.7% of dancers continued to dance and 57.7% dancers were able to return at the same or higher level prior to surgery.

Conclusion

Primary hip arthroscopy in dancers was successful as they experienced favorable PROMS, and achieved high rates of MCID for the mHHS, NAHS, and VAS and high rates of achievement for the MCID and PASS. Dancers experienced a high rate of 89.7% of continuing to dance at least 5 years after surgery with 57.7% returning to the pre-injury or higher performance level.