Working… Menu

Standard ACL Reconstruction vs ACL + Lateral Extra-Articular Tenodesis Study (STAbiLiTY)

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. Read our disclaimer for details. Identifier: NCT02018354
Recruitment Status : Unknown
Verified September 2017 by Western University, Canada ( University of Western Ontario, Canada ).
Recruitment status was:  Active, not recruiting
First Posted : December 23, 2013
Last Update Posted : September 26, 2017
International Society of Arthroscopy Knee Surgery and Orthopedic Sports Medicine
Orthopedic Research and Education Foundation
Information provided by (Responsible Party):
Western University, Canada ( University of Western Ontario, Canada )

Tracking Information
First Submitted Date  ICMJE December 2, 2013
First Posted Date  ICMJE December 23, 2013
Last Update Posted Date September 26, 2017
Study Start Date  ICMJE January 2014
Estimated Primary Completion Date March 2019   (Final data collection date for primary outcome measure)
Current Primary Outcome Measures  ICMJE
 (submitted: December 16, 2013)
Graft Failure [ Time Frame: 24 months ]
  • symptomatic instability requiring revision ACL surgery
  • positive pivot shift or asymmetrical pivot shift greater than other contralateral side
We will determine the absolute risk of graft failure in each group, calculate a relative risk (RR) and risk difference (RD) of graft failure with 95% confidence intervals around the estimate and use a Mantel Haentzel Test (random effect of surgeon) to determine the significance of the association between the addition of LET and graft failure rates. We will calculate the number needed to treat (NNT) to describe the number of patients who need to receive LET to prevent one graft failure over the first two postoperative years.
Original Primary Outcome Measures  ICMJE Same as current
Change History
Current Secondary Outcome Measures  ICMJE
 (submitted: December 16, 2013)
  • Disease-specific quality of life using the ACL Quality of Life Questionnaire (ACL-QOL) [ Time Frame: Baseline, 3, 6, 12, 24 months ]
    The ACL-QOL has five domains that query physical symptoms, occupational concerns, recreational activities, lifestyle, and social and emotional aspects. Each item has one 100 mm visual analogue scale response option, with labeled anchors at 0 mm (e.g., extremely difficult) and 100 mm (e.g., not difficult at all). Scores are calculated by converting the average of each of the five domain scores to a total average score out of 100% where 100% represents the best possible score.
  • Region-specific quality of life using the Knee Osteoarthritis and outcomes Score (KOOS). [ Time Frame: Baseline, 3, 6, 12, 24 months ]
    The KOOS is a 42-item knee-specific questionnaire with five separately reported domains, including pain (9 items), other symptoms (7 items), function in daily living (17 items), function in sports/recreation (5 items) and knee-related quality of life (4 items). Domain scores represent the average of all items in the domain standardized to a score from 0 to 100 (worst to best). This instrument has face validity and has demonstrated construct validity, excellent test-retest reliability for each domain (range, 0.75 to 0.93) and has been shown to be responsive to change in patients with knee OA and following HTO surgery.
  • MARX Activity Rating Scale [ Time Frame: Baseline, 3, 6, 12, 24 months ]
    The MARX Activity Rating Scale is a four-item activity rating scale. The patient is asked to rate how often they were able to perform each activity (e.g. running, cutting, decelerating, and pivoting) in their most healthy and active state. The patient is provided with five categories of frequency of each functional activity, ranging from less than one time in a month to four or more times in a week. One point is allocated for each category of frequency and a maximum score of 16 points can be awarded.
  • Passive knee extension and active-assisted knee flexion [ Time Frame: Baseline, 3, 6, 12, 24 months ]
    For passive knee extension, the patient is seated with both legs extended on a table, heel propped so that the calf and upper thigh clear treatment table. The patient will be instructed to relax both quadriceps and hamstrings to assure passive measurement. For active-assisted knee flexion, the patient is seated with both legs extended on a table. They will be instructed to perform active-assisted knee flexion by placing one hand under their thigh to initiate flexion and then clasp both hands just below the tibial tuberosity. This is measured as distance in centimeters of heel lift from the couch in passive hyperextension, and distance in centimeters of heel to buttock in flexion, both compared to the uninvolved side.
  • Quality-adjusted life years (QALYs) using the European Quality of Life Scale (Euro-QoL) [ Time Frame: Baseline, 3, 6, 12, 24 months ]
    The EuroQoL comprises two sections, the EQ-5D index and the EQ-5D visual analogue scale (VAS). The EQ-5D index is a 5 item standardized generic measure of HRQOL that includes domains of mobility, self-care, usual activities, pain and discomfort and anxiety and depression. Each item is score using a 3 point response scale and each combination of response choices describes a health state (243 unique health states). Each health state can be converted to a utility value from 0 (worst) to 1.0 (best) using a scoring formula. The EQ-5D VAS is a 0 (worst) to 100 (best) scale that assesses patient-perceived health status. The EQ-5D index and VAS have demonstrated good test retest reliability (0.73 and 0.70 respectively) and good cross-sectional construct validity in patients with rheumatoid arthritis and those with osteoarthritis of the knee, and is able to discriminate between functional classes in patients with arthritis.
  • Radiographic evidence of osteoarthritis [ Time Frame: Baseline, 12, 24 months ]
    Radiographic Evidence of osteoarthritis will also be evaluated with plain antero-posterior, Rosenberg and lateral view radiographs at 1 and 2 years.
  • Subjective symptoms, function and activity. [ Time Frame: Baseline, 3, 6, 12, 24 months ]
    The International Knee Documentation Committee (IKDC) Subjective Knee Form is an 18-item region specific, patient-important questionnaire containing the domains of symptoms, function and sports activities. The instrument measures subjective pain, stiffness and swelling, joint locking and instability. Function is assessed through comparing current knee function with knee function prior to injury. It evaluates sports activities based on ability to run, jump and land, stop and start quickly, ascend and descend stairs, stand, kneel on the front of the knee, squat, sit with the knee bent, and rise from a chair. Response types include 5-point Likert scales, 11-point Likert scales and dichotomous "yes or no" responses. The IKDC has been proven to be a valid and reliable instrument for patients suffering from knee injury and disability.
Original Secondary Outcome Measures  ICMJE Same as current
Current Other Pre-specified Outcome Measures Not Provided
Original Other Pre-specified Outcome Measures Not Provided
Descriptive Information
Brief Title  ICMJE Standard ACL Reconstruction vs ACL + Lateral Extra-Articular Tenodesis Study
Official Title  ICMJE Multicenter Randomized Clinical Trial Comparing Anterior Cruciate Ligament Reconstruction With and Without Lateral Extra-articular Tenodesis in Individuals Who Are At High Risk of Graft Failure.
Brief Summary The purpose of this study is to compare outcomes (failure, function, strength, range of motion and quality of life) between patients who receive the usual anterior cruciate ligament (ACL) reconstructive surgery and patients who receive anterior cruciate ligament reconstructive surgery with a lateral extra-articular tenodesis (extra tendon repair on the outside of the knee). Some studies have shown high graft failure rates (ACL re-tear) in young individuals who return to pivoting contact sports following ACL reconstruction. This study is designed to look at whether or not adding this extra tendon repair reduces the risk of graft failure in this population.
Detailed Description This study is a pragmatic study for a parallel groups, randomized clinical trial in which 600 patients with anterior cruciate ligament insufficiency who are undergoing surgery, are randomly allocated to either ACL reconstruction alone (control) or ACL reconstruction with lateral extra-articular tenodesis (experimental). Surgeons, data collectors, and the data analyst will be blind to group allocation. The primary outcome is rate of failure. Secondary outcomes include disease specific quality of life, return to function and sport. Patients are followed for two years postoperative.
Study Type  ICMJE Interventional
Study Phase  ICMJE Not Applicable
Study Design  ICMJE Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double (Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Condition  ICMJE Anterior Cruciate Ligament Reconstruction
Intervention  ICMJE
  • Procedure: Lateral Extra-Articular Tenodesis (LET)
    Lateral extra-articular tenodesis: A 1cm wide x 8cm long strip of iliotibial band is fashioned, leaving the Gerdys tubercle attachment intact. The graft is tunneled under the fibular collateral ligament (FCL) and attached to the femur with a Richards' staple (Smith & Nephew), just distal to the intermuscular septum, proximal to the femoral insertion of the FCL. Fixation is performed with the knee at 70 degrees flexion, neutral rotation. Minimal tension is applied to the graft. The free end is then looped back onto itself and sutured using the No. 1 vicryl.
  • Procedure: ACL Reconstruction
    Anatomic ACL reconstruction using a four-strand autologous hamstring graft. If the diameter of the graft is found to be less than 7.5mm, semitendinosus will be tripled (5 strand graft) providing a greater graft diameter. Femoral tunnels will be drilled using an anteromedial portal technique, with femoral fixation provided by an Endobutton or equivalent. Tibial fixation will be provided by interference screw.
Study Arms  ICMJE
  • Active Comparator: ACL Reconstruction
    Standard ACL reconstruction only.
    Intervention: Procedure: ACL Reconstruction
  • Experimental: ACL + LET
    Anatomic ACL reconstruction following the same procedure as the active comparator group with an added lateral extra-articular tenodesis (LET).
    • Procedure: Lateral Extra-Articular Tenodesis (LET)
    • Procedure: ACL Reconstruction
Publications *

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
Recruitment Information
Recruitment Status  ICMJE Unknown status
Actual Enrollment  ICMJE
 (submitted: September 25, 2017)
Original Estimated Enrollment  ICMJE
 (submitted: December 16, 2013)
Estimated Study Completion Date  ICMJE March 2019
Estimated Primary Completion Date March 2019   (Final data collection date for primary outcome measure)
Eligibility Criteria  ICMJE

Inclusion criteria:

  • ACL deficient knee
  • skeletally mature to 25 years of age
  • 2 or more of:

    • competitive pivoting sport
    • grade 2 pivot shift or greater
    • generalized ligament laxity - Beighton score of 4 or greater

Exclusion criteria:

  • previous ACL reconstruction on either knee
  • multi-ligament injury (two or more ligaments requiring surgical attention)
  • symptomatic articular cartilage defect requiring treatment other than debridement
  • greater than 3 degrees of asymmetric varus
  • unable to complete outcome questionnaires
Sex/Gender  ICMJE
Sexes Eligible for Study: All
Ages  ICMJE 14 Years to 25 Years   (Child, Adult)
Accepts Healthy Volunteers  ICMJE No
Contacts  ICMJE Contact information is only displayed when the study is recruiting subjects
Listed Location Countries  ICMJE Belgium,   Canada,   United Kingdom
Removed Location Countries  
Administrative Information
NCT Number  ICMJE NCT02018354
Other Study ID Numbers  ICMJE REB# 104524
Has Data Monitoring Committee No
U.S. FDA-regulated Product Not Provided
IPD Sharing Statement  ICMJE Not Provided
Responsible Party Western University, Canada ( University of Western Ontario, Canada )
Study Sponsor  ICMJE University of Western Ontario, Canada
Collaborators  ICMJE
  • International Society of Arthroscopy Knee Surgery and Orthopedic Sports Medicine
  • Orthopedic Research and Education Foundation
Investigators  ICMJE
Principal Investigator: Alan Getgood, MD University of Western Ontario, Canada
Study Director: Dianne Bryant, Phd University of Western Ontario, Canada
PRS Account Western University, Canada
Verification Date September 2017

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP