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Trial registered on ANZCTR
Registration number
ACTRN12617000272392
Ethics application status
Approved
Date submitted
28/01/2017
Date registered
22/02/2017
Date last updated
1/06/2022
Date data sharing statement initially provided
30/01/2019
Type of registration
Prospectively registered
Titles & IDs
Public title
Comparison of three approaches for primary Total Hip Arthroplasty
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Scientific title
Comparison of outcome measures and complication rates following three different approaches for primary Total Hip Arthroplasty. A pragmatic randomised controlled trial.
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Secondary ID [1]
291022
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nil known
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Universal Trial Number (UTN)
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Trial acronym
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Linked study record
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Health condition
Health condition(s) or problem(s) studied:
Osteoarthritis
301807
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Condition category
Condition code
Musculoskeletal
301490
301490
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0
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Osteoarthritis
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Surgery
301657
301657
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0
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Surgical techniques
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Intervention/exposure
Study type
Interventional
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Description of intervention(s) / exposure
Primary Total Hip Arthroplasty (THA) will be compared using three different surgical approaches. Anterior, Lateral and Posterior. Each approach has approximately the same surgical time of 90-120 minutes.
Posterior Approach:
This approach is the most common approach for THA worldwide today, made popular by Moore in 1959. This approach also allows excellent visualisation of the femoral shaft but involves detachment of the short external rotators of the hip with a posterior capsulotomy.
Hardinge Approach:
This was first described by Hardinge in 1982. This approach requires the reflection of gluteus medius and minimus muscles off the greater trochanter.
Anterior Approach:
Initial description of this approach to the hip joint was by Smith-Petersen. It utilises the anatomic internervous plane between the superior gluteal nerve laterally and femoral nerve medially and has recently been popularised for THR, but it’s first reported use dates back to 1947 in France by Judet and colleagues.
Patients will be randomised to surgical approach for THA.
Each consultant surgeon will perform the approach which is their usual standard of care.
Pre-operatively and post-operatively PROMs (OHS, VAS) will be taken at 6 weeks, 6, 12 and 24 months.
Complications will be monitored, specifically dislocation, infection and revision.
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Intervention code [1]
296995
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Treatment: Surgery
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Comparator / control treatment
This is a three-arm randomised controlled trial. Three arms will be compared directly.
The null hypothesis is that there will be no difference between approaches.
It is not possible to use one approach as the surgical control.
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Control group
Active
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Outcomes
Primary outcome [1]
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Patient reported outcome measures (Oxford Hip Score)
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Assessment method [1]
300883
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Timepoint [1]
300883
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6 weeks, 6 months, 12 months and 24 months post THA
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Primary outcome [2]
301050
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Visual Analogue Scale for pain
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Assessment method [2]
301050
0
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Timepoint [2]
301050
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Pre-operatively then 6 weeks, 6, 12 and 24 months post-operatively
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Secondary outcome [1]
331111
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Composite:
Residual pain - using Visual Analogue Scale and locating site of pain (trochanteric, gluteal or groin)
Complications including dislocation, infection, revision - defined by complication recorded in the medical record, return to theatre or patient reports complication occurring on follow up questioning.
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Assessment method [1]
331111
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Timepoint [1]
331111
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6 weeks, 6 months, 12 months and 24 months post THA
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Eligibility
Key inclusion criteria
Primary osteoarthritis of the hip requiring total hip replacement
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Minimum age
18
Years
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Maximum age
No limit
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Sex
Both males and females
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Can healthy volunteers participate?
No
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Key exclusion criteria
Prior bony procedures on hip
Indication for THA is fracture, malignancy or developmental dysplasia
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Study design
Purpose of the study
Treatment
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Allocation to intervention
Randomised controlled trial
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Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
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Methods used to generate the sequence in which subjects will be randomised (sequence generation)
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Masking / blinding
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Who is / are masked / blinded?
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Intervention assignment
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Other design features
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Phase
Not Applicable
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Type of endpoint/s
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Statistical methods / analysis
The null hypothesis for this study is that patient reported outcomes following three different approaches for THA are no different when directly compared after 24 months post-procedure. In addition we hypothesise that complication rates are the same between approaches. There is no randomised controlled trial that directly compares these three approaches for THA. We are hence designing our study as a superiority study looking for a significant difference in OHS and VAS between the different trial arms.
The randomization list will be computer-generated by an independent statistician. A stratified block permuted randomization will be used with the Kellgren-Lawrence grading scale (grade 0-2 vs. grade 3-4) as the stratification variable. The block size will not be disclosed to ensure concealment. Randomization will be enabled through a secure, web-based application.
The trial investigators will perform patient enrolment and random assignment. Patients will be randomised to one of three operative types within the patient’s Kellgren-Lawrence grading stratum.
The nine surgeons performing the operation will be assigned to an operation type according to their expertise. Each surgeon will perform a single operation type and each operation type will be conducted by three surgeons.
A patient will be managed by one of the three surgeons corresponding to the treatment group the patient is randomly assigned to with the actual surgeon depending on the surgeons’ roster at the time the patient presents him/herself for the operation. It is anticipated that each surgeon will treat roughly the same number of patients
The study will enrol a total of 243 patients to be treated by nine orthopaedic surgeons at Western Health or 81 patients per operation type.
The primary hypothesis will be examined by three contrasts evaluating the change from pre-operation to 24 months post-procedure in OHS overall score for the posterior versus Hardinge approach, the posterior versus anterior approach, and the Hardinge versus anterior approach using an alpha level of 1.67% for each contrast to allow for the three comparisons. The primary hypothesis will be rejected if at least one of the three comparisons reaches statistical significance using the two-sided Holm-Bonferroni-adjusted alpha level. An estimate and corresponding two-sided multiplicity-adjusted 98.33% confidence interval will be provided for each comparison. This analysis method uses a model-based approach to handle missing data providing valid inference if the missing data mechanism is ignorable (i.e., missing completely at random or missing at random). A range of sensitivity analyses to examine the robustness of the primary model results will be performed to explore the impact of the results of different missing data techniques under the same and under different missingness assumptions.
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Recruitment
Recruitment status
Recruiting
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Date of first participant enrolment
Anticipated
1/03/2017
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Actual
1/04/2017
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Date of last participant enrolment
Anticipated
30/06/2023
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Actual
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Date of last data collection
Anticipated
30/06/2025
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Actual
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Sample size
Target
243
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Accrual to date
140
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Final
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Recruitment in Australia
Recruitment state(s)
VIC
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Recruitment hospital [1]
7394
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Western Hospital - Footscray
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Recruitment postcode(s) [1]
15189
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3011 - Footscray
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Funding & Sponsors
Funding source category [1]
295450
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Other
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Name [1]
295450
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Western Health Orthopaedic Department
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Address [1]
295450
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Level 1 South,
Footscray Hospital
Gordon St,
Footscray VIC 3011
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Country [1]
295450
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Australia
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Primary sponsor type
Other
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Name
Western Health
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Address
Level 1 South,
Footscray Hospital
Gordon St,
Footscray VIC 3011
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Country
Australia
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Secondary sponsor category [1]
294272
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None
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Name [1]
294272
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Address [1]
294272
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Country [1]
294272
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Ethics approval
Ethics application status
Approved
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Ethics committee name [1]
296782
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Melbourne Health HREC
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Ethics committee address [1]
296782
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Office for Research The Royal Melbourne Hospital Level 2 South West 300 Grattan Street Parkville VIC 3050 Australia
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Ethics committee country [1]
296782
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Australia
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Date submitted for ethics approval [1]
296782
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14/03/2016
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Approval date [1]
296782
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25/10/2016
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Ethics approval number [1]
296782
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HREC/16/MH/207
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Summary
Brief summary
This is a project analysing three surgical approaches for the same orthopaedic procedure, total hip arthroplasty (THA). This study will be conducted as a pragmatic randomised controlled trial comparing three approaches to the hip joint for this procedure – anterior, posterior and direct lateral (Hardinge) approaches. The null hypothesis is there will be no difference in outcomes between three approaches in terms of patient satisfaction with the procedure. We will measure this via validated scores: patient reported outcome measures (PROMs).
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Trial website
n/a
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Trial related presentations / publications
n/a
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Public notes
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Contacts
Principal investigator
Name
72038
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Mr Phong Tran
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Address
72038
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Orthopaedic Department
Level 1 South
Footscray Hospital
Gordon Street, Footscray VIC 3011
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Country
72038
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Australia
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Phone
72038
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+61383457575
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Fax
72038
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Email
72038
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phong.tran@wh.org.au
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Contact person for public queries
Name
72039
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Libby Spiers
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Address
72039
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Orthopaedic Department
Level 1 South
Footscray Hospital
Gordon Street, Footscray VIC 3011
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Country
72039
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Australia
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Phone
72039
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+61383457575
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Fax
72039
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Email
72039
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libby.spiers@wh.org.au
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Contact person for scientific queries
Name
72040
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Adrian Talia
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Address
72040
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Orthopaedic Department
Level 1 South
Footscray Hospital
Gordon Street, Footscray VIC 3011
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Country
72040
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Australia
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Phone
72040
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+61383457575
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Fax
72040
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Email
72040
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ajtalia@gmail.com
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Data sharing statement
Will individual participant data (IPD) for this trial be available (including data dictionaries)?
No
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No/undecided IPD sharing reason/comment
Not relevant at this early stage
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What supporting documents are/will be available?
No Supporting Document Provided
Results publications and other study-related documents
Documents added manually
No documents have been uploaded by study researchers.
Documents added automatically
No additional documents have been identified.
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