The Effect of Prior Hip Arthroscopy on Patient-Reported Outcomes After Total Hip Arthroplasty: An Institutional Registry-Based, Matched Cohort Study.

Background: A significant number of patients who undergo hip arthroscopy will subsequently undergo total hip arthroplasty (THA) or hip resurfacing arthroplasty (HRA), although limited evidence exists regarding effects of prior hip arthroscopy on the outcomes of these procedures.

Methods: Of 5091 patients who underwent hip arthroscopy, we identified 69 patients who underwent subsequent THA (46) or HRA (23). Patients were matched to patients with no history of hip arthroscopy. Preoperative and 2-year postoperative Hip disability and Osteoarthritis Outcome Score, Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), Short Form-12, Lower Extremity Activity Scale score, and satisfaction surveys were compared.

Results: Patients who underwent THA with history of arthroscopy had lower postoperative Hip disability and Osteoarthritis Outcome Score Pain (82 ± 16 vs 93 ± 9, P = .003), Stiffness (85 ± 16 vs 93 ± 15, P = .01), Sports and Recreation (71 ± 22 vs 88 ± 18, P = .003), Quality-of-Life (65 ± 22 vs 86 ± 11, P < .0001), WOMAC Pain (86 ± 16 vs 93 ± 15, P = .03), WOMAC Stiffness (80 ± 21 vs 88 ± 17, P = .05), and Short Form-12 Physical Component Scores (48 ± 11 vs 54 ± 6, P = .008). They were less likely to be "very satisfied" after arthroplasty (71% vs 89%, P = .0008).

Conclusion: Hip arthroscopy before hip arthroplasty is associated with slightly lower results in several patient-reported outcomes. These results are relevant when assessing patients for hip arthroscopy and when counseling prospective arthroplasty patients with history of arthroscopy.