Predictors of physical functioning after total hip arthroplasty: a systematic review.
The objective of this systematic review of the literature was to identify the predictors of functional outcome after total hip arthroplasty (THA).



A systematic literature search in Web of Science, CINAHL, EMBASE and PubMed was conducted on 23 June 2015. The articles were selected based on their quality, relevance and measurement of the predictive factor. The level of evidence of all studies was determined using the GRADE rating scheme.



The initial search resulted in 1092 citations. After application of the inclusion and exclusion criteria, 33 articles met our eligibility criteria and were graded. Included studies were classified as level of evidence low (11), moderate (17) or high (5). Of the included studies, 18 evaluated body mass index (BMI), 17 evaluated preoperative physical functions, 15 evaluated age, 15 evaluated gender and 13 evaluated comorbidity. There was strong evidence suggesting an association between BMI, age, comorbidity, preoperative physical functions and mental health with functional outcome after THA. There was weak evidence suggesting an association between quadriceps strength and education with functional outcome after THA. The evidence was inconsistent for associations with gender and socioeconomic status and functional outcome following THA. We found limited evidence suggesting that alcohol consumption, vitamin D insufficiency and allergies were predictors of functional outcome following THA.



We have identified multiple predictors of functional outcome after THA, which will enable general practitioners and orthopaedic surgeons to better predict the improvement in physical functioning for their patients with THA. They can use this information to provide patient-specific advice regarding the referral for THA and the expected outcomes after THA. Further research with consistent measurement tools, outcomes and duration of follow-up across studies is needed to confirm the influence of these factors.
Department of Orthopaedic Surgery, Onze Lieve Vrouwe Gasthuis (OLVG), Amsterdam, The Netherlands.
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LD
Buirs
Department of Orthopaedic Surgery, Onze Lieve Vrouwe Gasthuis (OLVG), Amsterdam, The Netherlands.
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LW
Van Beers
Department of Orthopaedic Surgery, Onze Lieve Vrouwe Gasthuis (OLVG), Amsterdam, The Netherlands.
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VA
Scholtes
Department of Orthopaedic Surgery, Onze Lieve Vrouwe Gasthuis (OLVG), Amsterdam, The Netherlands.
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T
Pastoors
Division of Orthopedic Surgery, Department of Surgery, Centre for Evidence-Based Orthopedics, McMaster University, Hamilton, Ontario, Canada.
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Sprague
Department of Orthopaedic Surgery, Onze Lieve Vrouwe Gasthuis (OLVG), Amsterdam, The Netherlands.
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Poolman
D000367:Age Factors; D019644:Arthroplasty, Replacement, Hip; D015992:Body Mass Index; D015897:Comorbidity; D006621:Hip Joint / Q000503:physiopathology*; D006801:Humans; D015207:Osteoarthritis, Hip / Q000601:surgery*; D017060:Patient Satisfaction; D011379:Prognosis; D011788:Quality of Life; D020127:Recovery of Function; D016896:Treatment Outcome
arthroplasty; functional outcome; predictors; systematic review; total hip