Condition category
Nervous System Diseases
Date applied
Date assigned
Last edited
Retrospectively registered
Overall trial status
Recruitment status
No longer recruiting

Plain English Summary

Not provided at time of registration

Trial website

Contact information



Primary contact

Dr Unni G. Narayanan


Contact details

Division of Orthopaedic Surgery
The Hospital for Sick Children
555 University Avenue
M5G 1X8

Additional identifiers

EudraCT number number


Protocol/serial number


Study information

Scientific title

Functional outcomes following orthopaedic surgery based on gait laboratory versus observational gait analysis in ambulatory children with cerebral palsy: a multicentre pilot randomised controlled trial


Study hypothesis

For ambulatory children with cerebral palsy (CP) who undergo multi-level lower extremity orthopaedic surgery, the addition of gait analysis for surgical decision-making compared with observational analysis alone, results in greater improvement in function and/or gait appearance 2 years after surgery.

Specific objectives of the pilot trial:
The goal of this pilot trial is to establish the feasibility of, and to provide the template for the design and implementation of the definitive large multicentre trial to answer the question above. The specific objectives include:
1. Establish the feasibility of implementing the randomised trial study design in multiple centres
2. Estimate recruitment rates and timelines
3. Establish responsiveness of outcome measures to finalise the primary and secondary outcomes
4. Estimate effect sizes of functional outcomes for sample size calculations
5. Establish data management system (web-based database) for definitive multicentre study
6. Assess feasibility, reliability and face validity of pilot health economic data forms to include health economic evaluation in the future definitive multicentre trial

Secondary objectives include:
7. Does the addition of gait analysis alter surgical decisions made from video observation alone, when performed in the setting of this pilot trial?
8. Evaluate the consistency of the surgical decision making: intra- and inter-rater reliability

Ethics approval

1. Canada: Research Ethics Board (REB) of The Hospital for Sick Children approved in October 2006 (ref: 1000009387); reviewed and approved annually
2. Canada: REB of Bloorview Kids Rehab approved in February 2007 (ref: 06-013); reviewed and approved annually

Approval pending from:
3. Canada: REB of British Columbia Children's Hospital
4. Canada: REB of Glenrose Rehabilitation Hospital
5. USA: Institutional Review Board (IRB) of the University of Wisconsin

All other centres will seek ethics approval before recruiting participants.

Study design

Multicentre patient and outcomes-assessor blinded pilot randomised controlled clinical trial

Primary study design


Secondary study design

Randomised controlled trial

Trial setting


Trial type


Patient information sheet

Not available in web format, please use the contact details below to request a patient information sheet


Cerebral palsy


Children allocated to Group A (controls) will undergo orthopaedic surgery based on the physical examination and observational analysis of the gait alone, while children allocated to Group B (experimental) will undergo orthopaedic surgery using the physical examination, observational and the gait laboratory analysis data.

Treatment in this case is an assessment (gait, PT and questionnaires lasting approximately 4 hours) at baseline, 6, 12 and 24 months follow-up. The exact same procedures apply to each arm of the study (it is the information from the gait assessment that may or may not be given to the surgeon depending on randomisation), therefore any child on the study can expect to participate for 24 months.

Intervention type



Not Applicable

Drug names

Primary outcome measures

1. Gross Motor Function Measure (GMFM-66)
2. Gillette Gait (Normalcy) Index (GGI)
3. Pediatric Outcomes Data Collection Instrument (PODCI)
4. Functional Assessment Questionnaire (FAQ)
5. Functional Mobility Scale (FMS)
6. Activities Scale for Kids (ASK-performance)
7. Gait Parameters: gait velocity and stride length

The final primary and secondary outcome measures will be chosen based on responsiveness and their effect sizes used to calculate sample size for the definitive trial

Secondary outcome measures

Consistency of Surgeons' Decision Making: intra- and inter-rater reliability

The final primary and secondary outcome measures will be chosen based on responsiveness and their effect sizes used to calculate sample size for the definitive trial

Overall trial start date


Overall trial end date


Reason abandoned


Participant inclusion criteria

1. Diagnosis of spastic cerebral palsy
2. Age 6 to 15 years at the time of the initial assessment, either sex
3. Gross Motor Function Classification System (GMFCS) levels II or III (demonstrable independent ambulatory potential with or without orthotics/assist devices)
4. Patients have been referred for assessment and treatment of gait abnormality
5. Patients have a gait abnormality interfering with their physical function
6. Patients are candidates for orthopaedic surgery including soft tissue and/or bony procedures involving at least 2 levels, in one or both lower extremities (e.g. knee and ankle)
7. Patients must be able to undergo instrumented gait analysis testing in a motion laboratory

Participant type


Age group




Target number of participants


Participant exclusion criteria

1. Presence of dystonia, athetosis, or mixed tone abnormalities
2. History of orthopaedic lower extremity procedures within the previous 2 years
3. Patients who have had previous gait laboratory analysis that has been seen by the treating surgeon
4. Patients who will be unable to return for the required follow up visits/gait analysis

Recruitment start date


Recruitment end date



Countries of recruitment

Canada, United States of America

Trial participating centre

Division of Orthopaedic Surgery
M5G 1X8

Sponsor information


Bloorview Kids Rehab (Canada)

Sponsor details

150 Kilgour Road
M4G 1R8

Sponsor type

Hospital/treatment centre



Funder type

Research organisation

Funder name

Canadian Institutes of Health Research (CIHR) (Canada) - (ref: MCT-99826)

Alternative name(s)

Funding Body Type

Funding Body Subtype


Funder name

Bloorview Children's Hospital Foundation (Canada)

Alternative name(s)

Funding Body Type

Funding Body Subtype


Results and Publications

Publication and dissemination plan

Not provided at time of registration

Intention to publish date

Participant level data

Not provided at time of registration

Results - basic reporting

Publication summary

Publication citations

Additional files

Editorial Notes