Condition category
Injury, Occupational Diseases, Poisoning
Date applied
Date assigned
Last edited
Prospectively registered
Overall trial status
Recruitment status

Plain English Summary

Background and study aims
The Achilles tendon is the largest tendon in the human body and transmits the powerful contractions of the calf muscles that are required for walking and running. Consequently, when the tendon ruptures it has a serious detrimental impact on daily activities and results in prolonged periods off work and away from sporting activity. Achilles tendon rupture affects over 11,000 people each year in the UK, and the incidence is increasing as the population remains more active into older age. Controversy remains with regards the best rehabilitation plan for patients with a rupture of the Achilles. Traditionally, patients have been treated in a series of plaster casts; the casts extend from below the knee and around the ankle. The position of the cast is changed until the patient can put their weight through the foot. However, there is some evidence that a functional brace or ‘walking boot’ gives as much support and may speed recovery in the first year after the injury. We therefore propose to perform a study comparing plaster casts with functional bracing for patients with a rupture of the Achilles tendon. Phase 1 will confirm how many patients are willing to take part in a large-scale multi-centre randomised controlled trial. Phase 2 will be the proposed randomised controlled trial in a minimum of 22 hospitals across the UK.

Who can participate?
Adult patients attending a trial centre with a rupture of the Achilles tendon who have decided not to have surgery.

What does the study involve?
Patients will be randomly allocated to be treated with either functional bracing or a plaster cast. Both plaster casts and functional braces are widely used within the NHS, for both broken bones and sprains, and all of the clinical teams in the trial centres will be familiar with both techniques. A researcher will perform a clinical assessment and make a record of any early complications at 8 weeks. Functional outcome, quality of life and questionnaires of out-of-pocket expenses will be collected at 3, 6 and 9 months post-injury.

What are the possible benefits and risks of participating?
There are no specific risks or benefits to participants as both interventions are already used widely in the treatment of patients with an Achilles tendon rupture. The risks of an Achilles tendon rupture include: re-rupture, tendon lengthening, calf muscle weakness and blood clots, and these risks are present for both groups of patients in the study and indeed all patients with this injury.

Where is the study run from?
Oxford University Hospitals NHS Trust (UK).

When is the study starting and how long is it expected to run for?
April 2016 to May 2019

Who is funding the study?
NIHR Health Technology Assessment Programme - HTA (UK).

Who is the main contact?
Anna Liew

Trial website

Contact information



Primary contact

Ms Anna Liew


Contact details

Nuffield Department Of Orthopaedics
Rheumatology and Muscoloskeletal Sciences
University of Oxford
United Kingdom
+44 (0)1865 223115

Additional identifiers

EudraCT number number

Protocol/serial number

HTA 13/115/62; v1.0

Study information

Scientific title

UK Study of tendo Achilles Rehabilitation – a multicentre randomised clinical trial



Study hypothesis

There is no difference in the Achilles Tendon Rupture Score 9 months after rupture of the Achilles tendon, in non-operatively treated adult patients with either functional bracing or plaster cast immobilisation.

More details can be found at

Ethics approval

South Central - Oxford B Research Ethics Committee, 18/03/2016, REC ref: 16/SC/0109

Study design

Multi-centre two-arm parallel-group assessor-blind randomised controlled trial

Primary study design


Secondary study design

Randomised parallel trial

Trial setting


Trial type


Patient information sheet


Achilles tendon rupture


Participants will be randomized 1:1 to the following two groups:
1. A plaster cast will be applied in the ‘gravity equinus’ position. Over the first 8 weeks, as the tendon heals, the position of the plaster cast is changed until the foot achieves ‘plantargrade’. Weight bearing can commence thereafter.
2. A rigid functional brace will be applied, with equines foot position initially. Weight bearing can commence immediately. Plantargrade will be achieved gradually over 8 weeks after which the brace will be removed.

Intervention type



Drug names

Primary outcome measures

The primary outcome measure for this study is the Achilles tendon Total Rupture Score (ATRS). The ATRS is a validated questionnaire which is self-reported (filled out by the patient). It consists of 10 items assessing symptoms and physical activity specifically related to the Achilles tendon. It measures: strength, fatigue, stiffness, pain, activities of daily living, walking on uneven surfaces, walking upstairs or uphill, running, jumping and physical labour. This data will be collected at baseline, 3, 6 and 9 months post-injury.

Secondary outcome measures

1. EQ-5D; The EQ-5D-5L is a validated, generic health-related quality of life measure consisting of 5 dimensions each with a 5-level answer possibility.
2. Complications; all complications will be recorded, from the medical records at the 8-week review and self-reported by the patient thereafter, including: re-rupture, blood clots/emboli, pressure areas/hindfoot pain, falls and neurological symptoms in the foot.

Overall trial start date


Overall trial end date


Reason abandoned


Participant inclusion criteria

Patients will be considered for participation in this study if:
1. They are aged 16 years or older
2. They have a primary rupture of the Achilles tendon
3. They have decided to have non-operative treatment

Participant type


Age group




Target number of participants

Minimum 330, Maximum 550

Participant exclusion criteria

Patients will be excluded from participation in this study if they:
1. Present to the treating hospital more than 14 days after the injury
2. There is evidence that the patient would be unable to adhere to trial procedures or complete questionnaires; for example, a history of permanent cognitive impairment

Recruitment start date


Recruitment end date



Countries of recruitment

United Kingdom

Trial participating centre

Oxford University Hospitals NHS Trust
United Kingdom

Sponsor information


University of Oxford (UK)

Sponsor details

Block 60
Churchill Hospital
Old Road
United Kingdom

Sponsor type




Funder type


Funder name

NIHR Health Technology Assessment Programme - HTA (UK)

Alternative name(s)

Funding Body Type

Funding Body Subtype


Results and Publications

Publication and dissemination plan

To be confirmed at a later date

Intention to publish date


Participant level data

Available on request

Results - basic reporting

Publication summary

Publication citations

Additional files

Editorial Notes

31/10/2017: The target number of participants has been updated from 330 to 550. The minimum target number of participants is 330 and the maximum is 550. On 06/04/2016 the following changes were made to the trial record: 1. The overall trial start date was changed from 01/01/2016 to 01/04/2016. 2. The overall trial end date was changed from 28/02/2019 to 31/05/2019. 3. The recruitment start date was changed from 01/04/2016 to 01/07/2016. 4. The recruitment end date was changed from 28/02/2018 to 31/05/2018.