Abstract
BackgroundPatients with psychological distress are likely to have poorer short-term functional outcomes after total knee arthroplasty. However, the influence of psychological distress on the outcomes of total hip arthroplasty (THA) is relatively understudied. Previous studies also had short follow-ups of 1 year or less. We examined the influence of psychological distress on patient-reported outcomes and satisfaction, and analyzed the change in mental health after THA at a minimum of 2 years. MethodsProspectively collected data of 1384 patients undergoing primary THA in 2001-2015 were reviewed. Patients were assessed using the Oxford Hip Score, Western Ontario and McMaster Universities Osteoarthritis Index, and 36-item Short-Form health survey Physical Component Summary and Mental Component Score (MCS). Patients were stratified into those with psychological distress (MCS < 50, n = 720) and those without (MCS ≥ 50, n = 664). Multiple regression analysis was used to control for age, gender, body mass index, and baseline scores. The rate of satisfaction and expectation fulfillment was also analyzed. ResultsDistressed patients had a poorer Physical Component Summary at 6 months. However, there was no difference in patient-reported outcomes at 2 years. A higher proportion of distressed patients attained the minimal clinically important difference for Oxford Hip Score and Western Ontario and McMaster Universities Osteoarthritis Index, while 92.2% of distressed patients and 92.9% of nondistressed patients were satisfied at 2 years (P = .724). There was no difference in MCS after 6 months. The percentage of distressed patients also declined from 41.8% to 27.3%. ConclusionPatients with psychological distress achieved a comparable level of function, quality of life, and satisfaction 2 years after THA. Undergoing THA may also lead to mental health improvement in a subgroup of distressed patients.
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