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The WOW! Study. Weight-bearing or Non-weight bearing.


- candidate number14041
- NTR NumberNTR3727
- ISRCTNISRCTN wordt niet meer aangevraagd.
- Date ISRCTN created
- date ISRCTN requested
- Date Registered NTR28-nov-2012
- Secondary IDsNL40835.100.12 VCMO
- Public TitleThe WOW! Study. Weight-bearing or Non-weight bearing.
- Scientific TitleThe WOW! Study. Weight-bearing or Non-weight bearing.
- ACRONYMWOW
- hypothesisThe hypothesis of this study is that direct weight-bearing after operative fixation of ankle fractures, will shorten the period of assumption to work and/or sports and improve the range of motion of the affected ankle.
- Healt Condition(s) or Problem(s) studiedAnkle fracture, Weight bearing, Non weight-bearing
- Inclusion criteria1. Patients from 18 - 65 year;
2. Fractures classified as Lauge Hansen supination-eversion type 2, 3 or 4;
3. Articular discongruity of >2 mm on radiograph (international indication for surgery).
- Exclusion criteria1. Pre-existent impaired mobility;
2. Pre-existent cognitive disability;
3. Expected insufficiently stable fracture fixation with standard surgical technique;
4. Necessity for a syndesmosis screw;
5. Tertius fragment which requires operative fixation;
6. Body Mass Index > 30;
7. Diabetes mellitus;
8. Polytrauma patients (ISS>16 or >2 AIS regions involved);
9. Gustilo 2 and 3 open fractures;
10. Inability to comply with non-weight bearing mobilisation (i.e. due to other injuries / co-morbidity);
11. Inability to comply with follow-up (for example due to an inability to read or complete forms).
- mec approval receivedyes
- multicenter trialyes
- randomisedyes
- masking/blinding[default]
- controlActive
- groupParallel
- Type2 or more arms, randomized
- Studytypeintervention
- planned startdate 1-jan-2013
- planned closingdate1-jan-2017
- Target number of participants225
- Interventions1. Unprotected non-weight-bearing mobilisation with active exercises and crutches;
2. Protected weight-bearing with a conventional walking cast;
3. Unrestricted weight-bearing mobilisation with active exercises.
- Primary outcomeCompare functional results of the three postoperative care regimens assessed with the Olerud-Molander ankle score 12 weeks after surgery.
- Secondary outcome1. Compare functional results and patient satisfaction of the three postoperative care regimens assessed by the Olerud-Molander ankle score, 6 weeks and 1 year after surgery;
2. Compare the rate of wound related problems after the three postoperative care regimens;
3. Compare the rate of hardware failure after the three postoperative care regimens;
4. Compare range of motion (plantar-flexion and dorso-flexion) of the ankle after the three postoperative care regimens after 6 and 12 weeks and 1 year after surgery;
5. Compare the amount of weight baring (chip results), calf wasting (determined by the difference between the injured leg preoperatively and the same leg postoperatively with respect to the circumference of the leg) and muscle strength 12 weeks post-operatively;
6. Compare the duration to radiologic consolidation after the three postoperative care regimens 6 and 12 weeks and 1 year after surgery;
7. Compare patient satisfaction measured by the visual analogue scale (VAS) and SF-36 questionnaire 6 and 12 weeks and 6 and 12 months after surgery;
8. Compare period of resumption to work after the three postoperative care regimens;
9. Compare period of resumption to sports after the three postoperative care regimens.
- Timepoints1. 2 weeks;
2. 6 weeks;
3. 12 weeks;
4. 6 months;
5. 12 months.
- Trial web sitewww.enkelgebroken.nl
- statusplanned
- CONTACT FOR PUBLIC QUERIES Janity Silvany Pawiroredjo-Kieskamp
- CONTACT for SCIENTIFIC QUERIES Janity Silvany Pawiroredjo-Kieskamp
- Sponsor/Initiator Sint Antonius Ziekenhuis
- Funding
(Source(s) of Monetary or Material Support)
St Antonius Hospital, Nieuwegein
- PublicationsN/A
- Brief summaryRationale:
Indications for surgical treatment of ankle fractures are well defined, controversy exists with regard to the optimal postoperative treatment. Multiple postoperative care regimes exist and have been described as successful. However, an adequately powered prospective study comparing postoperative treatments and wound related problems is still lacking.

Objective:
The main objective of this multicenter prospective study is to compare functional outcome measured by the Olerud Molander Score at 12 weeks after operative fixation of an ankle fracture with three different postoperative care regimes. To be known: A) unprotected non-weight-bearing mobilisation with active exercises, B) protected weight-bearing mobilisation with a cast or C) unrestricted weight-bearing mobilisation with active exercises.

Study design:
This study is a prospective multicenter clinical study, which will be accomplished in three level 1 trauma centers (Academic Medical Center Utrecht, St. Elisabeth Hospital Tilburg, Medisch Centrum Haaglanden) and three large level 2 trauma centers (Antonius Hospital Nieuwegein, Diakonessenhuis Utrecht, Twee Steden Hospital Tilburg). Patients will be recruited at the emergency department and registered to the study. The indication for trial participation will be validated by an expert panel, who will classify the fracture based on the initial X-rays. After assessment and licensing by this panel, informed consent will be obtained. After open reduction and internal fixation patients will be randomised by a computerized blocked randomization and stratified by the participating hospitals. Patients who are allowed weight-bearing therapy will get a pressure-chip installed to their shoe or cast to analyse the weight distribution of the operatively fixed ankle during the first 6 weeks of rehabilitation. Reviews of the patients will be accomplished by the treating surgeon or investigator after 2, 6, 12 weeks, 6 and 12 months. Each visit includes physical examination, standardized clinical evaluation, registration of possible complications and completing the Olerud Molander and SF-36 questionnaires.

Study population:
Patients from 18 to 65 years will be included with fractures classified as Lauge Hansen supination-eversion 2-4 injury with concomitant articular discongruity of more than 2 mm.

Intervention:
After operative fixation of the ankle fractures, patients will be treated by one of the three treatment protocols, depending on randomisation: A) unrestricted non-weight-bearing mobilisation with active exercises, B) protected weight-bearing mobilisation with a cast or C) unrestricted weight-bearing mobilisation with active exercises.

Main study parameters/endpoints:
The Olerud Molander ankle score is the main study parameter/endpoint (12 weeks after surgery). Grouping of secondary endpoints results in three outcome groups: 1) Patient satisfaction (Olerud Molander Score, VAS for satisfaction, period of resumption to work, period of resumption to sports and period to pain free movement); 2) Medical parameters and safety (range of motion, clinical consolidation, radiologic consolidation, hardware failure and infection); 3) Biology of fracture healing (period to full weight bearing, degree of muscle wasting).
- Main changes (audit trail)
- RECORD28-nov-2012 - 6-dec-2012


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