Outcome
Type |
Measure |
Description |
Time frame |
Safety issue |
Primary |
Recurrent Dislocation of the Patella |
Reports of patellar dislocation will be recorded during the follow-up visits, and a clinical assessment of patellar mobility will be completed to assess the integrity of the MPFL to confirm the redislocation. The rate of re-dislocation will be calculated and compared with the published 30% recurrence rate for patients managed conservatively following a first-time patellar dislocation. A relative risk and risk difference of re-dislocation will be calculated. |
2-years |
|
Secondary |
Banff Patellofemoral Instability Instrument (BPII 2.0) |
The BPII 2.0 is a valid and reliable, disease-specific quality-of-life score with five domains, including symptoms and physical complaints; work-related concerns; sport, recreation, and competition; lifestyle; and social and emotional. This patient-reported outcome will be assessed before surgery, and 6, 12, and 24 months after surgery. Score range 0-100, with higher score indicative of higher quality of life. |
2-years |
|
Secondary |
Single-leg Hop tests |
The hop tests involve a comparative assessment of limb-to-limb function for a single hop for distance, a 6-metre timed hop, a triple hop for distance, and a triple cross-over hop at 6, 12, and 24 months after surgery. |
2-years |
|
Secondary |
Single-leg Balance test |
Single-leg balance on a Bosu ball will be assessed for each limb to a maximum time of 30 seconds at 6, 12, and 24 months after surgery. |
2-years |
|
Secondary |
Isometric Muscle Strength |
A crane gauge will be used to measure quadriceps and hamstrings strength in kilograms before surgery and 6, 12, and 24 months after surgery. |
2-years |
|
Secondary |
Recurrent Instability of the Patella (RIP) Score |
The RIP score uses age, skeletal maturity, trochlear dysplasia, and TT-TG/PL ratio to predict recurrence. This score can categorize patients into low, intermediate, and high risk for re-dislocation. |
2-years |
|
Secondary |
Visual analogue scale (VAS) pain scores in the initial 14-days post-operative |
A log book will be used to record VAS pain scores twice daily for the first 14 days post-operative. The score will be marked on a 100mm line where o represents no pain and 100 represents severe pain. |
2-weeks |
|
Secondary |
Medication use in the initial 14-days post-operative |
A log book will be used to record medication use for the first 14 days post-operative. Patients will indicate the medications used and the dose consumed each day. |
2-weeks |
|
Secondary |
Tampa Kinesiophobia Scale (TSK-11) |
Patient-reported outcome measure of kinesiophobia using the TSK-11 will completed pre-operatively and 6, 12, and 24 months post-operative. The minimum score is 11 and the maximum score is 44, with higher scores indicative of greater kinesiophobia. |
2-years |
|
Secondary |
ACL Return to Sport after Injury (ACL-RSI) |
Patient-reported outcome measure for return to sport using the ACL-RSI will completed pre-operatively and 6, 12, and 24 months post-operative. The minimum score is 0 and the maximum score is 100. Higher scores indicate greater psychological preparation for return to sport. |
2-years |
|