Trial Review

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Trial registered on ANZCTR


Registration number
ACTRN12618000906257
Ethics application status
Approved
Date submitted
19/05/2018
Date registered
30/05/2018
Date last updated
16/05/2019
Date data sharing statement initially provided
16/05/2019
Type of registration
Prospectively registered

Titles & IDs
Public title
Clinical trial comparing two surgical techniques used to treat instability of the ankle in those people who are normally involved in sports activities.
Scientific title
Lateral ligament augmentation versus modified Brostrom-Gould procedure for chronic lateral ankle instability: A randomised controlled trial.
Secondary ID [1] 294918 0
nil known
Universal Trial Number (UTN)
Trial acronym
Linked study record

Health condition
Health condition(s) or problem(s) studied:
Chronic lateral ankle instability 307880 0
Condition category
Condition code
Musculoskeletal 306929 306929 0 0
Other muscular and skeletal disorders
Surgery 307001 307001 0 0
Surgical techniques

Intervention/exposure
Study type
Interventional
Description of intervention(s) / exposure
The operation is performed with the patient under a general anaesthetic in an operating theatre. An examination under anaesthesia is performed and a diagnostic arthroscopy using two standard portals. The LARS procedure is performed using an anterolateral incision and approach to the ankle, similar to primary incision and approach to that used for the MBG procedure, with two additional 1cm incisions. The most distal incision is used to anchor the CFL limb of the LARS to the isometric insertion site on the calcaneum, and the proximal one is used to draw the LARS loop up the fibular tunnel and for individual tensioning of the ATFL and CFL. A 5mm tunnel is drilled in the fibula at the area where the ATFL and CFL attachments overlap, aiming proximally and posteriorly within the centre of the fibula, ensuring that the tunnel is at least 25mm long. A 4.5mm x 20mm blind ending tunnel is drilled at the distal insertion sites of the ATFL and CFL. A separate 1cm capsulotomy is performed at the insertion site of the ATFL so that the ATFL limb of the LARS will run in an extra-capsular location, while the CFL limb of the LARS will run from the distal insertion site deep to the peroneal tendons and capsule, again in an extracapsular location. Both limbs of the LARS are secured to their respective insertion sites using a 4.75 suture anchor (BioComposite SwiveLock, Arthrex Inc). Once the loop of the LARS is passed from distal to proximal along the fibular tunnel it can be retrieved via the most proximal incision the two limbs tensioned individually to create a stable ankle, and then secured using a third 4.75 mm SwiveLock. The excess loop is then excised flush with the posterior surface of the fibula. A simple repair of the LCL complex is then performed using absorbable suture (1-vicryl) with imbrication of the attenuated structure, before closing the wound in layers. The surgery take approximately 70 minutes to perform.
All patients are placed in a dorsal back slab until 7-10 days post-surgery. At this first post-operative review the wound is checked and the patients placed in a sub-talar stabilizing brace. The patient is allowed to weight bear as tolerable in the brace, and the rehabilitation program commenced under the supervision of the treating physiotherapist. The rehabilitation protocol aimed to return patients to full activity within 3-4 months of surgery.
The surgery is performed by the main author / researcher as described in the study protocol.
Intervention code [1] 301233 0
Treatment: Surgery
Comparator / control treatment
The modified Brostrom-Gould procedure is currently the most commonly performed surgical procedure for this condition, and therefore was used as the comparator.
The procedure is performed in an operating theatre with the patient under a general anaesthetic. The initial examination under anaesthesia and ankle arthroscopy are performed as described above. A similar anterolateral incision and approach is made to the anterolateral capsule and ligaments
The ligaments are dissected out, divided, double breasted and reattached to bone using a double arm loaded Smith and Nephew Twin-Fix Ti titanium suture anchors with ultra-braid suture material . Three of these anchors are used and and both the ATFL and CFL are repaired in all cases. The surgery take approximately 70 minutes to perform.The post-operative protocol is similar to that for the LARS procedure described above.
Control group
Active

Outcomes
Primary outcome [1] 305912 0
The Foot and Ankle Outcome score or FAOS is a patient-scored questionnaire validated for use following lateral ankle ligament injury. The patients scores their ankle in each of the following sub-scales "pain", "other symptoms", "activities of daily living", "sport and quality of life". The score for each sub-scale and the total score are calculated with 0 being the worst possible score and 100 the best possible score.
Timepoint [1] 305912 0
Done prior to surgery, and then at 1 (primary endpoint), 2 and 5 years post surgery, and 5 year intervals thereafter for up to 20 years
Secondary outcome [1] 347010 0
The occurrence of any complications is noted when the patient is assessed post-operatively by the surgeon. It is a separate outcome
Timepoint [1] 347010 0
1,2, 5 & 10 years post surgery
Secondary outcome [2] 347397 0
Tegner activity score - this a patient scored outcome which indicates the level of sports activity that they are are able to take part in, where 0 is the lowest possible score and 10 the highest. This is a validated questionnaire for use following knee or ankle injury.
Timepoint [2] 347397 0
This is completed at the following time intervals - prior to surgery, and then 1,2, and 5 years post surgery and 5 yearly interval thereafter up to 20 years post surgery

Eligibility
Key inclusion criteria
Physically active (sport at least 3 times per week), skeletally mature, for for a general anaesthetic, body weight less than 90kg, remaining symptomatically unstable despite physiotherapy (that is having chronic lateral ankle instability)
Minimum age
12 Years
Maximum age
65 Years
Sex
Both males and females
Can healthy volunteers participate?
No
Key exclusion criteria
Complex ankle injuries, generalised ligamentous laxity, body weight > 90kg, previous ankle surgery, medical conditions contra-indicating general anesthetic, known connective tissue disease or rheumatologic conditions. Patients were excluded if they had relative contra-indications to the MBG procedure, otherwise the study may have been biased in favour of the LARS augmentation procedure.

Study design
Purpose of the study
Treatment
Allocation to intervention
Randomised controlled trial
Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
Because there were extra-incision associated with the LARS procedure (two small 1cm incisions, it was not possible to blind the patients from which procedure they had performed) and therefore allocation was not concealed.
Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Simple randomisation using the toss of a coin
Masking / blinding
Open (masking not used)
Who is / are masked / blinded?



Intervention assignment
Parallel
Other design features
Phase
Not Applicable
Type of endpoint/s
Efficacy
Statistical methods / analysis
A power analysis has been performed. Using a standard deviation of 5 units for the total FAOS, 19 patients were required in each group to achieve a power of 80%, with 95% significance. If 1 point is regarded as clinically important, in order to detect a significant difference between the mean Tegner activity scores in the two groups, 20 patients in each group would provide a power of 80% with 95% confidence.
The mean age of the patients in the two groups at baseline will be compared using analysis of variance (ANOVA) and the male:female ratio using chi-squared tests. Generalised linear models and multi-variate tests to will be used to compare the changes in the FAOS scores, both total scores and each sub-scale, seen within each group, at 1, 2, 5 and subsequent years following surgery, and the Tegner activity scores. T-tests and Mann-Whitney U test, will be used to compared the changes in FAOS scores during each time-interval following surgery. We set the significance level at P<0.05.

Recruitment
Recruitment status
Recruiting
Date of first participant enrolment
Anticipated
1/07/2018
Actual
1/07/2018
Date of last participant enrolment
Anticipated
1/07/2025
Actual
Date of last data collection
Anticipated
Actual
Sample size
Target
42
Accrual to date
12
Final
Recruitment in Australia
Recruitment state(s)
ACT,NSW

Funding & Sponsors
Funding source category [1] 299602 0
Self funded/Unfunded
Name [1] 299602 0
Mark Porter
Country [1] 299602 0
Australia
Primary sponsor type
Individual
Name
Mark Porter
Address
Mark Porter, COSM,
Suite 21 Calvary Clinic, Mary Potter Circuit,
BRUCE, ACT 2617
Country
Australia
Secondary sponsor category [1] 298921 0
None
Name [1] 298921 0
Address [1] 298921 0
Country [1] 298921 0

Ethics approval
Ethics application status
Approved
Ethics committee name [1] 300402 0
Barton Private Hospital, Medical Advisory and Ethics Committee
Ethics committee address [1] 300402 0
Ethics committee country [1] 300402 0
Australia
Date submitted for ethics approval [1] 300402 0
18/01/2018
Approval date [1] 300402 0
18/01/2018
Ethics approval number [1] 300402 0
#1

Summary
Brief summary
Trial website
Trial related presentations / publications
Public notes

Contacts
Principal investigator
Name 83546 0
Dr Mark Porter
Address 83546 0
Canberra Orthopaedics and Sports Medicine (COSM)
Suite 21 Calvary Clinic, Mary Potter Circuit, Bruce, ACT 2617, Australia
Country 83546 0
Australia
Phone 83546 0
+61 (02) 6253 5404
Fax 83546 0
Email 83546 0
[email protected]
Contact person for public queries
Name 83547 0
Mark Porter
Address 83547 0
COSM, Suite 21 Calvary Clinic, Mary Potter Circuit, Bruce, ACT 2617
Country 83547 0
Australia
Phone 83547 0
+61 (02) 6253 5404
Fax 83547 0
Email 83547 0
[email protected]
Contact person for scientific queries
Name 83548 0
Mark Porter
Address 83548 0
COSM, Suite 21 Calvary Clinic, Mary Potter Circuite, Bruce ACT 2671
Country 83548 0
Australia
Phone 83548 0
+61 (02) 6253 5404
Fax 83548 0
Email 83548 0
[email protected]

Data sharing statement
Will individual participant data (IPD) for this trial be available (including data dictionaries)?
No
No/undecided IPD sharing reason/comment


What supporting documents are/will be available?

No Supporting Document Provided



Results publications and other study-related documents

Documents added manually
TypeIs Peer Reviewed?DOICitations or Other DetailsAttachment
Study results articleYes American Journal of Sports Medicine, The American ... [More Details]

Documents added automatically
SourceTitleYear of PublicationDOI
EmbaseAnkle Lateral Ligament Augmentation Versus the Modified Brostrom-Gould Procedure: A 5-Year Randomized Controlled Trial.2019https://dx.doi.org/10.1177/0363546518820529
N.B. These documents automatically identified may not have been verified by the study sponsor.