The Warwick Agreement on femoroacetabular impingement syndrome (FAI syndrome): an international consensus statement.

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Abstract

The 2016 Warwick Agreement on femoroacetabular impingement (FAI) syndrome was convened to build an international, multidisciplinary consensus on the diagnosis and management of patients with FAI syndrome. 22 panel members and 1 patient from 9 countries and 5 different specialties participated in a 1-day consensus meeting on 29 June 2016. Prior to the meeting, 6 questions were agreed on, and recent relevant systematic reviews and seminal literature were circulated. Panel members gave presentations on the topics of the agreed questions at Sports Hip 2016, an open meeting held in the UK on 27-29 June. Presentations were followed by open discussion. At the 1-day consensus meeting, panel members developed statements in response to each question through open discussion; members then scored their level of agreement with each response on a scale of 0-10. Substantial agreement (range 9.5-10) was reached for each of the 6 consensus questions, and the associated terminology was agreed on. The term 'femoroacetabular impingement syndrome' was introduced to reflect the central role of patients' symptoms in the disorder. To reach a diagnosis, patients should have appropriate symptoms, positive clinical signs and imaging findings. Suitable treatments are conservative care, rehabilitation, and arthroscopic or open surgery. Current understanding of prognosis and topics for future research were discussed. The 2016 Warwick Agreement on FAI syndrome is an international multidisciplinary agreement on the diagnosis, treatment principles and key terminology relating to FAI syndrome.Author note The Warwick Agreement on femoroacetabular impingement syndrome has been endorsed by the following 25 clinical societies: American Medical Society for Sports Medicine (AMSSM), Association of Chartered Physiotherapists in Sports and Exercise Medicine (ACPSEM), Australasian College of Sports and Exercise Physicians (ACSEP), Austian Sports Physiotherapists, British Association of Sports and Exercise Medicine (BASEM), British Association of Sport Rehabilitators and Trainers (BASRaT), Canadian Academy of Sport and Exercise Medicine (CASEM), Danish Society of Sports Physical Therapy (DSSF), European College of Sports and Exercise Physicians (ECOSEP), European Society of Sports Traumatology, Knee Surgery and Arthroscopy (ESSKA), Finnish Sports Physiotherapist Association (SUFT), German-Austrian-Swiss Society for Orthopaedic Traumatologic Sports Medicine (GOTS), International Federation of Sports Physical Therapy (IFSPT), International Society for Hip Arthroscopy (ISHA), Groupo di Interesse Specialistico dell'A.I.F.I., Norwegian Association of Sports Medicine and Physical Activity (NIMF), Norwegian Sports Physiotherapy Association (FFI), Society of Sports Therapists (SST), South African Sports Medicine Association (SASMA), Sports Medicine Australia (SMA), Sports Doctors Australia (SDrA), Sports Physiotherapy New Zealand (SPNZ), Swedish Society of Exercise and Sports Medicine (SFAIM), Swiss Society of Sports Medicine (SGMS/SGSM), Swiss Sports Physiotherapy Association (SSPA).

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Most cited references 60

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OARSI recommendations for the management of hip and knee osteoarthritis, Part II: OARSI evidence-based, expert consensus guidelines.

W. Zhang, R W Moskowitz, G Nuki … (2008)

To develop concise, patient-focussed, up to date, evidence-based, expert consensus recommendations for the management of hip and knee osteoarthritis (OA), which are adaptable and designed to assist physicians and allied health care professionals in general and specialist practise throughout the world. Sixteen experts from four medical disciplines (primary care, rheumatology, orthopaedics and evidence-based medicine), two continents and six countries (USA, UK, France, Netherlands, Sweden and Canada) formed the guidelines development team. A systematic review of existing guidelines for the management of hip and knee OA published between 1945 and January 2006 was undertaken using the validated appraisal of guidelines research and evaluation (AGREE) instrument. A core set of management modalities was generated based on the agreement between guidelines. Evidence before 2002 was based on a systematic review conducted by European League Against Rheumatism and evidence after 2002 was updated using MEDLINE, EMBASE, CINAHL, AMED, the Cochrane Library and HTA reports. The quality of evidence was evaluated, and where possible, effect size (ES), number needed to treat, relative risk or odds ratio and cost per quality-adjusted life years gained were estimated. Consensus recommendations were produced following a Delphi exercise and the strength of recommendation (SOR) for propositions relating to each modality was determined using a visual analogue scale. Twenty-three treatment guidelines for the management of hip and knee OA were identified from the literature search, including six opinion-based, five evidence-based and 12 based on both expert opinion and research evidence. Twenty out of 51 treatment modalities addressed by these guidelines were universally recommended. ES for pain relief varied from treatment to treatment. Overall there was no statistically significant difference between non-pharmacological therapies [0.25, 95% confidence interval (CI) 0.16, 0.34] and pharmacological therapies (ES=0.39, 95% CI 0.31, 0.47). Following feedback from Osteoarthritis Research International members on the draft guidelines and six Delphi rounds consensus was reached on 25 carefully worded recommendations. Optimal management of patients with OA hip or knee requires a combination of non-pharmacological and pharmacological modalities of therapy. Recommendations cover the use of 12 non-pharmacological modalities: education and self-management, regular telephone contact, referral to a physical therapist, aerobic, muscle strengthening and water-based exercises, weight reduction, walking aids, knee braces, footwear and insoles, thermal modalities, transcutaneous electrical nerve stimulation and acupuncture. Eight recommendations cover pharmacological modalities of treatment including acetaminophen, cyclooxygenase-2 (COX-2) non-selective and selective oral non-steroidal anti-inflammatory drugs (NSAIDs), topical NSAIDs and capsaicin, intra-articular injections of corticosteroids and hyaluronates, glucosamine and/or chondroitin sulphate for symptom relief; glucosamine sulphate, chondroitin sulphate and diacerein for possible structure-modifying effects and the use of opioid analgesics for the treatment of refractory pain. There are recommendations covering five surgical modalities: total joint replacements, unicompartmental knee replacement, osteotomy and joint preserving surgical procedures; joint lavage and arthroscopic debridement in knee OA, and joint fusion as a salvage procedure when joint replacement had failed. Strengths of recommendation and 95% CIs are provided. Twenty-five carefully worded recommendations have been generated based on a critical appraisal of existing guidelines, a systematic review of research evidence and the consensus opinions of an international, multidisciplinary group of experts. The recommendations may be adapted for use in different countries or regions according to the availability of treatment modalities and SOR for each modality of therapy. These recommendations will be revised regularly following systematic review of new research evidence as this becomes available.

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Femoroacetabular impingement: radiographic diagnosis--what the radiologist should know.

Klaus Siebenrock, Judy Anderson, Moritz Tannast (2007)

The purpose of this article is to show the important radiographic criteria that indicate the two types of femoroacetabular impingement: pincer and cam impingement. In addition, potential pitfalls in pelvic imaging concerning femoroacetabular impingement are shown. Femoroacetabular impingement is a major cause for early "primary" osteoarthritis of the hip. It can easily be recognized on conventional radiographs of the pelvis and the proximal femur.

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Cam impingement causes osteoarthritis of the hip: a nationwide prospective cohort study (CHECK).

Jan Verhaar, M. Heijboer, Jan Waarsing … (2013)

To determine the association between cam impingement, which is hip incongruity by a non-spherical femoral head and development of osteoarthritis. A nationwide prospective cohort study of 1002 early symptomatic osteoarthritis patients (CHECK), of which standardised anteroposterior pelvic radiographs were obtained at baseline and at 2 and 5 years follow-up. Asphericity of the femoral head was measured by the α angle. Clinically, decreased internal hip rotation (≤20°) is suggestive of cam impingement. The strength of association between those parameters at baseline and development of incident osteoarthritis (K&L grade 2) or end-stage osteoarthritis (K&L grades 3, 4, or total hip replacement) within 5 years was expressed in OR using generalised estimating equations. At baseline, 76% of the included hips had no radiographic signs of osteoarthritis and 24% doubtful osteoarthritis. Within 5 years, 2.76% developed end-stage osteoarthritis. A moderate (α angle>60°) and severe (α angle>83°) cam-type deformity resulted in adjusted OR of 3.67 (95% CI 1.68 to 8.01) and 9.66 (95% CI 4.72 to 19.78), respectively, for end-stage osteoarthritis. The combination of severe cam-type deformity and decreased internal rotation at baseline resulted in an even more pronounced adjusted OR, and in a positive predictive value of 52.6% for end-stage osteoarthritis. For incident osteoarthritis, only a moderate cam-type deformity was predictive OR=2.42 (95% CI 1.15 to 5.06). Individuals with both severe cam-type deformity and reduced internal rotation are strongly predisposed to fast progression to end-stage osteoarthritis. As cam impingement might be a modifiable risk factor, early recognition of this condition is important.

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Author and article information

Journal

Journal ID (iso-abbrev): Br J Sports Med

Title: British journal of sports medicine

Publisher: BMJ

ISSN (Electronic): 1473-0480

ISSN (Print): 0306-3674

Publication date (Electronic): Oct 2016

Volume: 50

Issue: 19

Affiliations

[1 ] Warwick Medical School, University of Warwick, Coventry, UK University Hospitals of Coventry and Warwickshire NHS Trust, Coventry, UK.

[2 ] Hip Arthroscopy Australia, Melbourne, Victoria, Australia St Vincents Private Hospital, East Melbourne, Victoria, Australia.

[3 ] Department of Orthopaedics, Erasmus University Medical Centre, Rotterdam, The Netherlands.

[4 ] Medsport, Department of Orthopaedic Surgery, University of Michigan, Ann Arbor, Michigan, USA.

[5 ] Department of Clinic of Orthopaedic and Trauma Surgery, Luzerner Kantonspital, Luzern, Switzerland.

[6 ] Department of Orthopaedic Surgery, Washington University School of Medicine St. Louis, St. Louis, Missouri, USA.

[7 ] Aspetar, Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar.

[8 ] Sports Surgery Clinic, Dublin, Ireland Department of Medicine, University College Cork, Cork, Ireland.

[9 ] Southampton Football Club, UK.

[10 ] Department of Physiotherapy, The University of Melbourne, Melbourne, Victoria, Australia.

[11 ] Aspetar, Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar Department of Orthopaedic Surgery, Sports Orthopaedic Research Center (SORC-C), Copenhagen University Hospital, Amager-Hvidovre, Denmark.

[12 ] Corades, LLC, Brookline, Massachusetts, USA Medical Service, Madrid Open Tennis, Madrid, Spain.

[13 ] Hip Preservation Center, Baylor University Medical Center at Dallas, Dallas, Texas, USA.

[14 ] Rangos School of Health Sciences, Physical Therapy, Duquesne University, Pittsburgh, Pennsylvania, USA UPMC Center for Sports Medicine, Pittsburgh, Pennsylvania, USA.

[15 ] Department of Orthopaedic Surgery, Duke University Medical Center, Durham, North Carolina, USA.

[16 ] Steadman Philippon Research Institute, Vail, Colorado, USA.

[17 ] Hip Arthroscopy Australia, Melbourne, Victoria, Australia Australian Sports Physiotherapy Department of Physiotherapy, The University of Melbourne, Centre for Health, Exercise and Sports Medicine, Melbourne, Victoria, Australia Bond University.

[18 ] Department of Orthopaedic Surgery, Sports Orthopaedic Research Center (SORC-C), Copenhagen University Hospital, Amager-Hvidovre, Denmark.

[19 ] Coventry, UK.

[20 ] Aspetar, Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar Amsterdam Centre for Evidence-based Sports Medicine, Academic Medical Centre, Amsterdam, The Netherlands.

[21 ] Department of Physiotherapy, The University of Melbourne, Centre for Health, Exercise and Sports Medicine, Melbourne, Victoria, Australia.