Paper 66: Short-Term Outcomes in Hip Arthroscopy Patients Participating in Formal Physical Therapy vs a Home Exercise Program: A Prospectively Enrolled Cohort Analysis

Abstract

Objectives: The treatment of femoroacetabular impingement (FAI) has evolved over the last two decades, transitioning from an open hip dislocation to a more minimally invasive arthroscopic approach as the gold standard for treatment. The non-surgical management of FAI has evolved as well, and a key mainstay of the treatment paradigm for FAI has become physical therapy, both in the preoperative and postoperative periods. Previous research has demonstrated the importance of physical therapy in reducing pain and improving function in patients with FAI. As FAI treatment has changed, the delivery of patient physical therapy and rehabilitation has similarly changed, specifically with the introduction of home exercise programs that are patient-driven methods of postoperative rehabilitation. While other areas of orthopaedic surgery, such as shoulder and knee arthroplasty, have demonstrated similar results when comparing formal physical therapy programs with home-based programs, a comparable study has yet to be conducted specifically in the hip arthroscopy patient population. Given this lack of investigation, the purpose of this study was to compare the short-term outcomes of a formal physical therapy program or a home exercise program (HEP) in FAI patients treated with hip arthroscopy. Our hypothesis was that individuals in both groups would report similar outcomes at short- term follow up and would be significantly improved from their preoperative baselines. Methods: Patients undergoing hip arthroscopy for the treatment of FAI at a single center from October 2020 to October 2021 were prospectively enrolled. Inclusion criteria were 1) completion of a preoperative survey, 2) age greater than 18 years at time of surgery, and 3) lack of previous hip surgery. Patients were allowed to self-select to a formal physical therapy (FPT) program, which consisted of a traditional physical therapy course, or a home exercise program (HEP). Patients were administered a survey preoperatively and at 1 month, 3 months, 6 months, and 12 months postoperatively. Included in the survey was a single assessment numeric evaluation (SANE), visual analogue scale (VAS) pain scores, the International Hip Outcome Tool-12 (iHOT-12), the Patient-Reported Outcomes Measurement Information System Physical Function (PROMIS PF), and patient satisfaction of physical therapy and their overall care. Demographic characteristics were collected from the electronic medical record. Statistical analysis was conducted using descriptive statistics, unpaired and paired t-tests, and Chi Square and Fisher’s Exact tests for categorical variable comparisons. A p-value of < 0.05 was used to indicate statistical significance. Results: A total of 147 patients were included in this study, with 61 in the FPT group and 86 in the HEP group. There were no significant differences regarding patient sex (p = 0.675) and body mass index (p = 0.188), though the HEP group was slightly older than the FPT group (33.6 ± 9.5 years vs 30.1 ± 11.4 years; p = 0.048). At 12 months postoperative, no significant differences were reported between the FPT and HEP groups regarding hip function rated as a percent of normal (p = 0.576), VAS pain scores at rest (p = 0.262) or during activities of daily living (p = 0.214) or during sport (p = 0.066), PROMIS PF scores (p = 0.426), and iHOT-12 scores (p = 0.421). Furthermore, no differences were reported in patient satisfaction (p > 0.05). Outcome scores at 12 months postoperative were significantly improved from the preoperative baseline across all measures in both groups (p > 0.05). Conclusions: For patients undergoing hip arthroscopy for the treatment of FAI, formal physical therapy and home exercise programs are similarly efficacious in terms of patient-reported outcomes of hip function, with both rehabilitation options resulting in significant patient improvement at short term follow-up from their preoperative baseline. [Table: see text][Table: see text]