Abstract
Femoro-acetabular impingement (FAI) is a common cause of hip pain and dysfunction in the young and active population. Despite reports of good short-term outcomes following treatment for FAI, less is known about the possible preoperative predictors of treatment outcome. The purpose of this study was to identify predictors of treatment outcome, using a patient-reported outcome measurement score (PROM) validated for use in a young and active population undergoing arthroscopic surgery for FAI. Patients were prospectively enrolled and analysed using the PROM International Hip Outcome Tool (iHOT-12) preoperatively and at a 2-year follow-up. Predictors of treatment outcome chosen for analysis were age, gender, duration of symptoms until surgery, level of cartilage damage, preoperative score and FAI type. A total of 198 patients, 122 males and 76 females (M: 61.6%, F: 38.4%), with a mean age of 41 ± 12.1 years, were analysed. The preoperative iHOT-12 score correlated with the postoperative iHOT-12 score at the 2-year follow-up. For one iHOT-12 point positive difference preoperatively, an additional 0.65 points were gained postoperatively at the 2-year follow-up (P ≤ 0.001). Age, gender, symptom duration until surgery, level of cartilage damage and FAI type did not have a statistically significant correlation to the postoperative score. Preoperative hip function as measured by the iHOT-12 is a potential predictor of outcome following FAI surgery relative to other factors.
Highlights
The idea that impingement in the form of mechanical conflict in the moving hip causes pain and leads to a decreased range of motion was reported as early as 1936 by SmithPetersen, who performed acetabular rim trimming and femoral neck osteoplasty in patients with acetabular protrusion and a chronic slipped capital epiphysis [1]
It was not until 2003 that Ganz et al [2] formulated the modern concept of femoro-acetabular impingement (FAI) and proposed Femoro-acetabular impingement (FAI) as a primary cause of idiopathic osteoarthritis
The purpose of the present study was to identify predictors of treatment outcome at a 2-year follow-up in a large cohort undergoing arthroscopic treatment for FAI, using patient-reported outcome measurement score (PROM) validated for use in a young and active population
Summary
The idea that impingement in the form of mechanical conflict in the moving hip causes pain and leads to a decreased range of motion was reported as early as 1936 by SmithPetersen, who performed acetabular rim trimming and femoral neck osteoplasty in patients with acetabular protrusion and a chronic slipped capital epiphysis [1]. It was not until 2003 that Ganz et al [2] formulated the modern concept of femoro-acetabular impingement (FAI) and proposed FAI as a primary cause of idiopathic osteoarthritis. The arthroscopic technique has demonstrated lower rates of complication compared with the open surgical technique for the treatment of FAI [6, 7]
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