Outcome
Type |
Measure |
Description |
Time frame |
Safety issue |
Other |
Knee osteoarthritis Outcome Score for children (KOOS Child) |
The scale contains 7 questions answered through a 0-4 likert scale. The scale is normalized to a 0-100 score, with zero representing extreme knee problems and 100 representing no knee problems.
In this study participants will fill out questions from the subscales "sport/rec", "quality of life" and question P1, P4, P6b and P6b from the "pain" subscale. |
Day 1 |
|
Other |
The Tampa Scale 17 (TSK-17) |
The Tampa Scale is a 17-item questionnaire to evaluate fear avoidance behaviour in patients experiencing pain. It consists of two subscales on activity avoidance and somatic focus. The questions are rated on a 1-4 likert scale by the patient. The sum of the points are ranged from 17-68, with above 37 points being defined as "high level" of kinesiophobia. |
Day 1 |
|
Other |
Duration of pain |
Participants self-reported duration of pain denoted in months |
Day 1 |
|
Other |
Worst pain in the last week |
The perceived pain in the last week, rated on the Numerical Pain Rating scale, 0-10 with 0 being no pain and 10 being worst imaginable. |
Day 1 |
|
Other |
Worst pain in the last 24 hours |
The perceived pain in the last 24 hours, rated on the Numerical Pain Rating scale, 0-10 with 0 being no pain and 10 being worst imaginable. |
Day 1 |
|
Other |
Current pain |
The participants current pain on the Numerical Pain Rating scale, 0-10 with 0 being no pain and 10 being worst imaginable. |
Day 1 |
|
Other |
Counter Movement Jump Test |
The participants will perform three trials of a countermovement jump which will be recorded on a smartphone camera (>240 frames per second). Subsequently, it will be analyzed for jump height using the MyJump 2 smartphone application. |
Day 1 |
|
Other |
Counter Movement Jump Test |
The participants will perform three trials of a countermovement jump which will be recorded on a smartphone camera (>240 frames per second). Subsequently, it will be analyzed for power (W) using the MyJump 2 smartphone application. |
Day 1 |
|
Other |
Pain during Counter Movement Jump Test |
The participants will perform three trials of a countermovement jump. The pain during each jump will be rated on the 0-10 Numerical Pain Rating scale, 0-10 with 0 being no pain and 10 being worst imaginable. |
Day 1 |
|
Other |
Anterior Knee Pain Provocation test |
The participants will perform the Anterior Knee Pain Provocation test and rate the pain on the 0-10 Numerical Pain Rating Scale before and after the test. Only the affected knee is tested. For controls, the affected knee will be decided by coin toss. |
Day 1 |
|
Other |
Level of sports- participation and performance compared to before knee pain |
Participants are asked if they perform either 1) at a higher level than before onset of knee pain, 2) at the same level as before onset of knee pain, or 3) at a lower level than before onset of knee pain |
Day 1 |
|
Other |
Level of physical activity compared to before knee pain |
Participants are asked if they are either 1) more physically active than before onset of knee pain, 2) just as physically active as before onset of knee pain, or 3) are less physically active as before onset of knee pain |
Day 1 |
|
Primary |
Rate of torque development (Nm/s/kg) at 0-200 ms during maximal isometric knee extension |
Test performed seated on an examination bed with a belt-fixated handheld dynamometer (MicroFet 2, Hoggan Scientific, USA) at 60 degrees of knee flexion during a 5 second maximal exertion. |
Day 1 |
|
Primary |
Rate of torque development (Nm/s/kg) at 0-100 ms during maximal isometric knee extension |
Test performed seated on an examination bed with a belt-fixated handheld dynamometer (MicroFet 2, Hoggan Scientific, USA) at 60 degrees of knee flexion during a 5 second maximal exertion. |
Day 1 |
|
Primary |
Peak rate of torque development (Nm/s/kg) during maximal isometric knee extension |
Test performed seated on an examination bed with a belt-fixated handheld dynamometer (MicroFet 2, Hoggan Scientific, USA) at 60 degrees of knee flexion during a 5 second maximal exertion. |
Day 1 |
|
Primary |
Time to peak force, during maximal isometric knee extension |
Test performed seated on an examination bed with a belt-fixated handheld dynamometer (MicroFet 2, Hoggan Scientific, USA) at 60 degrees of knee flexion during a 5 second maximal exertion. |
Day 1 |
|
Primary |
Rate of torque development (Nm/s/kg) at 0-200 ms during maximal isometric knee flexion |
Test performed seated on an examination bed with a belt-fixated handheld dynamometer (MicroFet 2, Hoggan Scientific, USA) at 20 degrees of knee flexion during a 5 second maximal exertion. |
Day 1 |
|
Primary |
Rate of torque development (Nm/s/kg) at 0-100 ms during maximal isometric knee flexion |
Test performed seated on an examination bed with a belt-fixated handheld dynamometer (MicroFet 2, Hoggan Scientific, USA) at 20 degrees of knee flexion during a 5 second maximal exertion. |
Day 1 |
|
Primary |
Peak rate of torque development (Nm/s/kg) during maximal isometric knee flexion |
Test performed seated on an examination bed with a belt-fixated handheld dynamometer (MicroFet 2, Hoggan Scientific, USA) at 20 degrees of knee flexion during a 5 second maximal exertion. |
Day 1 |
|
Secondary |
Pain during strength testing (NRS 10) |
Numerical Pain Rating scale, 0-10 with 0 being no pain and 10 being worst imaginable. |
Day 1 |
|