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CompletedNCT05119088Updated Mar 1, 2023

Development of a Test Battery for Measurement of Knee Function in Patients With Patellar Instability

An interventional study of Return to Sport testbattery in Patella, Joint Instability and Patellofemoral Joint Dislocation, sponsored by Haraldsplass Deaconess Hospital. Completed at 1 site in Norway. Open to participants aged 13 Years to 45 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2023-03-01.

Sponsored by Haraldsplass Deaconess Hospital · Not applicable, Interventional, and Other

From the registry’s dates

  • Registered 9 months after the study started (first participant enrolled Jan 2021, registered Oct 2021).
Phase
Not applicable
Study type
Interventional
Enrollment
120
Allocation
Not applicable
Ages
13 Years to 45 Years
Sex
All
01

Study summary

About six months after patella stabilizing surgery postoperative restrictions are commonly lifted and patients may consider whether a return to activity/sports is feasible. Currently, there are no evidence-based criteria to determine a patients readiness for sports and/or activity (RTS) following stabilizing surgery. The purpose of this project was therefore to investigate the feasibility of a test battery to evaluate knee function in postoperative follow-up evaluation - and in RTS decisions - for patients with patellar instability. Banff Patellofemoral Instability Instrument 2.0 and Norwich Patellar Instability Score is being translated and validatend in a Norwegian population. Furter is patients experience of living with patellar instability explored.

02

Conditions studied

  • Patella
  • Joint Instability
  • Patellofemoral Joint Dislocation
03

In context

Patella Fracture

40 studies on the registry are indexed under Patella Fracture; 9 are open to participants now.

This study's enrollment of 120 is above the median of 53 across 30 interventional studies indexed under Patella Fracture.

Browse Patella Fracture studies →

Lead sponsor

Haraldsplass Deaconess Hospital is the lead sponsor of 8 studies on the registry; none are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
13 Years to 45 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Patients who have undergone surgical treatment for recurrent patellar dislocation in Helse Vest. The investigators will include patients with reconstruction of the medial patella femoral ligament, trochleaplasty, tibial tubercle osteotomy, Insall or concomitant procedures.

Exclusion criteria

Exclusion Criteria:

  • Unable to give written .
  • Medial patellar dislocation.
  • unable to understand written or spoken Norwegian.
  • patients with other knee injuries.
Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

05

Study design

Phase
Not applicable
Primary purpose
Other
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
120 participants (actual)

Interventions

  • OtherReturn to Sport testbattery

    At baseline, approximately 3 weeks before surgery and 6 months after surgery: patients conduct a testbattery consisting of 2 PROMs: the NPI-No and BPII2.0-No together with three physical tests: isokinetic strength tests, hop tests and Y-balance test. For the cross-cultural validation of NPI and BPII2.0 patients also conduct KOOS, IKDC 2000 and Tampa Scale.

    Also known as: Validation of Banff Patellofemoral Instability Instrument 2.0 - No, Validation of Norwich Instability Score - No

06

What researchers measure

Primary outcomes

  1. Banff Patellofemoral Instability Instrument 2.0 change from pre- to postopertaive score

    Self-administered, disease-specific quality of life score. It will be administered as a patient completed questionnaire.

    Time frame: Baseline and 6 months after surgery.

  2. Norwich patellar Instability score change from pre- to postopertaive score.

    Patient-perceived symptoms of patellar instability during activity. It will be administered as a patient completed questionnaire.

    Time frame: Baseline and 6 months after surgery.

Secondary outcomes

  1. Y-balance test

    Evaluates knee stability and asymmetrical balance in three directions (anterior, posteromedial and posterolateral).

    Time frame: Baseline and 6 months after surgery.

  2. Single legged hop tests

    Comprises four tasks: single-leg hop for distance, triple hop for distance, triple cross-over hop for distance and six-meter timed hop.

    Time frame: Baseline and 6 months after surgery.

  3. Isokinetic strength test

    Strength testing of knee extension / flexion (Biodex system 4 dynamometer, Biodex Medical Systems Inc., Shirley, New York). With a standardized protocol of five repetitions at 60 o/sec and 30 repetitions at 240 o/sec.

    Time frame: Baseline and 6 months after surgery.

  4. IKDC-2000

    Is a knee-specific, patient reported tool, including 18 questions across three domains: symptoms, physical activity and function. It will be administered as a patient completed questionnaire.

    Time frame: Baseline and 6 months after surgery.

  5. KOOS

    Is an instrument to assess the patient's opinion about their knee and associated problems. It comprises five domains: pain, other symptoms, function in daily living, function in sports and recreational activities and knee-related QOL. It will be administered as a patient completed questionnaire.

    Time frame: Baseline and 6 months after surgery.

  6. Tampa scale of kinesiophobia

    TSK is a 17-item patient-reported questionnaire aimed at quantifying the fear of re-injuries due to movement and physical activity. It will be administered as a patient completed questionnaire.

    Time frame: Baseline and 6 months after surgery.

07

Study locations

1 site
  • Haraldsplass Deaconess Hospital
    Bergen, 5008, Norway
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Jan 2021 to primary completion in Feb 2023, 25 months.

Of 18 interventional studies with no phase under Patella Fracture, half reached primary completion within 34 months of starting (the median), counting those still running; a quarter within 19 and three quarters within 136. This study's 25 months is below that.

How these figures are worked out, and which studies are left out of them.

Registered
Oct 5, 2021
First posted
Nov 12, 2021
StartActual
Jan 4, 2021
Primary completionActual
Feb 20, 2023
CompletionActual
Feb 20, 2023
Last update
Mar 1, 2023
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Mar 1, 2023, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05119088
Lead sponsor
Haraldsplass Deaconess Hospital
Responsible party
Trine Hysing-Dahl (Principal Investigator, Haraldsplass Deaconess Hospital) — Principal investigator
First posted
Nov 12, 2021
Start date
Jan 4, 2021
Primary completion
Feb 20, 2023
Completion
Feb 20, 2023
Last update
Mar 1, 2023

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Feb 2023. You cannot join it, but the record below documents what was studied.

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