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Arthroscopic Surgical Procedures vs Sham Surgery for Patients With Femoroacetabular Impingement and/or Labral Tears. (HIPARTI)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. Identifier: NCT02692807
Recruitment Status : Recruiting
First Posted : February 26, 2016
Last Update Posted : May 16, 2017
La Trobe University
University of Aarhus
Lund University
University of Oxford
University of Ottawa
Information provided by (Responsible Party):
May Arna Risberg, Oslo University Hospital

Brief Summary:

The primary aim of this study is to determine the efficacy of hip arthroscopic surgery compared to a sham surgery (diagnostic arthroscopy only) for patients with symptomatic and radiological findings related to impingement (FAI) and/or labral tears using a randomized controlled design (HIPARTI Study: Primary aim and the main paper: primary end point: iHOT 1 year follow-up)).

Our main hypothesis is that surgical procedures of the hip will demonstrate greater efficacy than sham surgery (diagnostic hip arthroscopy only) for hip related quality of life (iHOT-33) after 1 year and at further (HIPARTI Study).

The secondary aim of this study is to establish modifiable risk factors associated with pain, function, work participation and quality of life over 1 year in people aged 18-50 years with hip impingement and/or labral tears diagnosed at hip arthroscopy. (HARP Study: A separate paper will be published with this main aim for the HARP Study) Long-term follow-ups for HIPARTI Study as well as HARP Study will be performed at 2, 5 and 10 years (secondary aims and separate papers).

Condition or disease Intervention/treatment Phase
Surgery Procedure: Arthroscopic surgical procedures Not Applicable

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Detailed Description:

This is a multicenter, international, assessor and patient blinded clinical RCT with two groups (primary aim). the HIPARTI Study with The design of this trial conforms to the SPIRIT guidelines.

All patients with hip pain eligible for hip arthroscopy in our routine care pathways will be identified in our outpatient clinics. Consultant orthopedic surgeons will determine a patient's eligibility for the study (based on inclusion and exclusion criteria for the study) and members of their team introduce the study to the patients and refer them to the research coordinators for further information. Patients will be provided with oral and written information about the study and be introduced to our consent form. If interest continues the patient will be provided with further information and arrangements will be made for a baseline appointment for assessment and consenting.

The baseline assessment appointments will occur within one month of the initial approach. At the baseline appointment patients will meet with the research coordinator and the independent research assistant/tester (physical therapist) who will be the blinded tester. Patients will return their signed informed consent form and baseline questions completed. Those who are not willing to participate in the RCT (HIPARTI Study), will be asked if interested in being included in a prospective longitudinal cohort study including similar baseline and follow-up tests as those in the RCT (this will be the HARP Study with separate papers published). All patients in the HARP Study will undergo hip arthroscopy surgery. The Australian site will include most of their patients in the HARP Study, since the majority of orthopedic surgeons working privately will not participate in the HIPARTI Study. Data collection will be performed electronically for both the HIPARTI and the HARP Studies entering all data in the approved Checkware system (

Each collaborating center will apply to the ethical committee and the Data Inspectorate in each country/institution. Approval was confirmed for Oslo University Hospital (HIPARTI) and Australia (HARP Study) in January 2016.

Randomization (HIPARTI) will occur prior to surgery, after final eligibility is confirmed. Randomizations will be performed centrally using an automated computer generated system. Block randomization and stratification for each center will be performed.

All patients will undergo imaging (which may include CT scan or at least 1.5 Tesla magnetic resonance imaging MRI) prior to the surgical assessment as part of routine care. All patients will also undergo standardized radiographs of the hips and pelvis also as part of routine care. Plain radiographs will be examined for evidence of osteoarthritis as joint space narrowing, osteophytes, cysts and subchondral hypertrophy. Several radiographic measurements will be performed among them: the alpha angle and lateral center-edge angle will be determined for the presence of FAI. Radiographs will also be part of follow-ups.

Participating orthopedic surgeons will be asked to coordinate their waiting lists to ensure the hip arthroscopy patients are called for surgery in accordance with the study protocol. Ideally, patients will complete their baseline assessment as close to the randomized treatment as possible (within 1 months). In the event that surgery cannot be performed within 1 month after baseline assessment, the same questions and assessments completed at baseline will be completed again. The standard followed-ups at the 6 months and 1 year include primary and secondary outcomes. One year is the primary end point where randomization code will be broken according to a predefined published statistical protocol (HIPARTI).

At all follow-ups the research coordinator/independent tester will attend. At the 6 month follow-up an independent orthopedic surgeon will attend regularly and take care of patients who are not satisfied. The aim is to use the following criteria as subjective complaint: equal or worse than 10 points for the IHOT-33 score compared to baseline. All patients can withdraw without giving a reason at any time (stated in the consent form that all patients need to sign). An unblinded orthopedic surgeon will of course be able to have access to the medical record regarding performed procedures at any time if need for the health of the patient.

All patients (in both groups in the RCT (HIPARTI) as well as in the HARP study) will undergo a postoperative rehabilitation program based on the best available evidence. Each patient will be treated by physical therapists who will be trained and proficient in post-hip arthroscopy rehabilitation. Rehabilitation will be delivered a minimum of 8 sessions over 3-months and then once a month for the following three months. Details of rehabilitation are outlined in Appendix Rehabilitation. This contains a treatment algorithm to guide clinical reasoning and progression of treatment (manual therapy, exercises and education) through weeks 1-12.

Long term follow-ups will be performed at 2, 5 and 10 years Due to lack of studies published within this field: clinical relevant differences as well as changes within groups and SD are difficult to estimate. Our sample size calculations are based on primary outcome iHOT 33 at 1 year: estimated effect-size to 0.6 and a power of 90, will give 60 in each group, and with expected 15% dropout will give 138 patients in total. Electronic randomization lists will be generated, and estimations of inclusion rates per site are included. Statistical analysis procedures will be published and analysis performed prior to opening the group allocation when all patients are included and followed through to the 1 year follow-up (main outcome).

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 140 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Intervention Model Description: The RCT part of the HIPARTI Study has 2 arms, but there is also a prospective longitudinal study of those who are either not willing to participate in the RCT, or where the study takes part in collaborating countries were there is ONLY the prospective longitudial ongoing (Australia). This part of the study is the HARP study. The HIPARTI consists on one RCT trial eith two parallel arms, and one prospective cohort, the HARP study.
Masking: Double (Participant, Outcomes Assessor)
Masking Description: This is only for the RCT Study - the double-blinded study. The HARP study consists of only a prospective longitudial study With same outcome measure and follow-ups; hence, given 3 arms. The below "Allocation" and "Number of Subjects" is ONLY for the RCT part of the study
Primary Purpose: Treatment
Official Title: Arthroscopic Surgical Procedures Versus Sham Surgery for Patients With Femoroacetabular Impingement and/or Labral Tears. A Multicentre, International, Double-blinded Randomized, Controlled Trial.
Study Start Date : February 2016
Estimated Primary Completion Date : December 2020
Estimated Study Completion Date : December 2035

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Tears

Arm Intervention/treatment
Active Comparator: Hip arthroscopy surgical procedures (HIPARTI Study)
Surgery is performed under general anaesthesia. Traction and joint access is controlled by fluoroscopy. A diagnostic round in the central and peripheral compartment is performed. Labrum, cartilage, and other possible conditions are looked for and findings are documented. Any labral, chondral and bony pathology (cam or pincer) is treated. Labrum may be debrided, sutured, detached and refixed if needed to treat a pincer lesion. Labrum is secured with suture anchors. Pincer and cam resection is performed using an arthroscopic burr. Cartilage lesions maybe left untreated or treated with debridement or microfracture.
Procedure: Arthroscopic surgical procedures
See arm/group description of Arthroscopic surgery and sham surgery (HIPARTI). HARP: only arthroscopic surgery
Other Name: Sham Surgery

Placebo Comparator: Sham surgery (HIPARTI Study)
The same arthroscopic procedures as stated above are preformed, but no surgical interventions related to Cam, Pincer, or labral tear are performed, only diagnostic round in the central and peripheral compartment is performed. Labrum, cartilage, and other possible conditions are looked for and findings are documented.
Procedure: Arthroscopic surgical procedures
See arm/group description of Arthroscopic surgery and sham surgery (HIPARTI). HARP: only arthroscopic surgery
Other Name: Sham Surgery

Active Comparator: Prospective Cohort (HARP Study)
Those that are not willing to be included in the RCT (HIPARTI Study), will be asked if they are willing to be included in the prospective cohort, or ongoing in countries were ONLY the surgery is performed (Australia). They will sign an informed concent and will undergo surgical interventions as part of usual care. Outcomes collected and follow-ups will be the same as for the RCT (HIPARTI).
Procedure: Arthroscopic surgical procedures
See arm/group description of Arthroscopic surgery and sham surgery (HIPARTI). HARP: only arthroscopic surgery
Other Name: Sham Surgery

Primary Outcome Measures :
  1. International Hip Outcome Tool (IHOT-33) [ Time Frame: Baseline, 6,12 an 24 months follow-ups - 1 year follow-up is main outcome ]
    Patient-reported outcome measure (PRO)

Secondary Outcome Measures :
  1. Expectations of surgery [ Time Frame: Baseline ]

  2. HOOS - Hip Dysfunction and Osteoarthritis Outcome Score [ Time Frame: Baseline, 6,12 an 24 months follow-ups - only in some study sites ]
    Patient-reported outcome measure (PRO) 5 subscales

  3. ASES Arthritis Self-Efficacy Scale [ Time Frame: Baseline, 6,12 an 24 months follow-ups ]
    Self-Efficacy Scale questionnaire

  4. Tampa scale of Kinesiophobia [ Time Frame: Baseline, 6,12 an 24 months follow-ups ]
    Fear of movement questionnaire

  5. Hip Sports Activity Scale (HSAS) [ Time Frame: Baseline, 6,12 an 24 months follow-ups ]
    Activity Level (type)

  6. Work place Activity Limitation Survey (WALS) [ Time Frame: Baseline, 6,12 an 24 months follow-ups ]
    Questionnaire (only for some of the study sites)- only in some study sites

  7. Patient Spesific Functional Scale [ Time Frame: Baseline, 6,12 an 24 months follow-up ]
    Patient report on 3 specific activities and their limitations - only in some study sites

  8. Measures of hip physical impairment: [ Time Frame: Baseline, 6,12 an 24 months follow-ups ]
    Range of motion

  9. Hip muscle strength [ Time Frame: Baseline, 6,12 an 24 months follow-ups ]

  10. Single leg squat performance [ Time Frame: Baseline, 6,12 an 24 months follow-ups ]
    Performance tests - only in some study sites

  11. Total Hip Replacement. [ Time Frame: 1, 2, 5 and 10 years follow-up ]
    Data from the Norwegian National Joint Registry on total hip joint arthroplasty (or similar registries from the other countries)

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

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Ages Eligible for Study:   18 Years to 50 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • hip pain during daily and/or spor t ing activities;
  • intra-articular hip pain with radiological signs of FAI and/or labral tears eligible for hip arthroscopy (to be determined in a pragmatic fashion by the surgeon based on clinical examination and imaging
  • the patient is able to give written informed consent and to participate fully in the interventions and follow-up procedures

Exclusion Criteria:

  • pain that is not confirmed by physical examination of the hip
  • evidence of preexisting osteoarthritis, defined as Tonnis grade >1, or less than 3mm superior joint space width on AP pelvic radiograph
  • center edge angle on radiograph <25°; (v) previous known hip pathology such as Perthes' disease, slipped upper femoral epiphysis or avascular necrosis
  • previous hip injury such as acetabular fracture, hip dislocation or femoral neck fracture
  • previous hip surgery
  • medical conditions complicating surgery (ASA 3); (ix) inflammatory joint disease (RA, Bechterew etc)
  • physical inability to undertake testing procedures
  • expected lack of compliance such as cognitive impairment, drug abuse or similar;
  • inability to understand the written and spoken language of the treatment centre;
  • contra-indications to placebo surgery, which will include large loose body, chondral flap >1cm2 detached at 3 sides, complete labral radial flap tear and labral bucket-handle tear with complete avulsion >1.5cm long

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT02692807

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Contact: May Arna Risberg, PT, PhD 4741312776
Contact: Agnethe Nilstad, PT, PhD 4799224469

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Australia, Victoria
LaTrobe University, School Allied Health, College of Science, Helath and Engineering Recruiting
Melbourne, Victoria, Australia, 3086
Contact: Kay Crossley, PT, PHD    +61411055738   
Principal Investigator: Joanne Kemp, PT, PHD         
Division of Orthopedic Surgery, Oslo University Hospital Recruiting
Oslo, Norway, 4956
Contact: Sverre Loken, MD, PhD    +4790704448   
Contact: Tom Ludvigsen, MD    +4790642130   
Sponsors and Collaborators
Oslo University Hospital
La Trobe University
University of Aarhus
Lund University
University of Oxford
University of Ottawa
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Principal Investigator: May Arna Risberg, PT, PhD Oslo University Hospital
Study Director: Lars Nordsletten, MD, PhD Oslo University Hospital

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Responsible Party: May Arna Risberg, Professor, Oslo University Hospital Identifier: NCT02692807     History of Changes
Other Study ID Numbers: NAR-1- 2016
2015091 ( Other Grant/Funding Number: South-Eastern Norway Regional Health Authority )
First Posted: February 26, 2016    Key Record Dates
Last Update Posted: May 16, 2017
Last Verified: February 2017
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Undecided
Plan Description: Data will be shared across the sites participating in the HIPARTI and the HARP Study, according to the protocol and the decisions made by the Advisory Committee

Keywords provided by May Arna Risberg, Oslo University Hospital:
hip arthroscopy
femoroacetabular impingement
exercise therapy after hip arthroscopy
rehabilitation after hip arthroscopy

Additional relevant MeSH terms:
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Femoracetabular Impingement
Joint Diseases
Musculoskeletal Diseases
Pathologic Processes