Novel Method for Diagnosing Lateral Patellar Compression Syndrome Using X-ray: a Retrospective Case-Control Study
Study Details
Study Description
Brief Summary
This study evaluates whether the patellar axial radiograph of lateral patellar curvature angle （LPCA）with knee flexion at 30 ° can be used as a new diagnostic surrogate of lateral patellar compression syndrome（LPCS）. We believe that the new index LPCA has high sensitivity and specificity in initial diagnosis of LPCS using axial patellar radiograph with knee flexion at 30 ° , and has high application value.
| Condition or Disease | Intervention/Treatment | Phase |
|---|---|---|
|
Detailed Description
Background: A well-established reference is lacking for diagnosing lateral patellar compression syndrome (LPCS), and this diagnosis currently depends on clinicians' subjective judgment and several examination results. X-rays are primarily used to diagnose LPCS, but they have low detection rates of patellar tilt using the congruence angle (CA) and patellar tilting angle (PTA).
Purpose: To investigate whether patellar axial radiography of the lateral patellar curvature angle (LPCA) of knee in 30° flexion can diagnose LPCS.
Methods: We enrolled 87 patients between 2016 and 2019 and divided them as per diagnosis into three groups of 29 each: LPCS, patellar dislocation (PD, control), and meniscus tear (MT, negative control) groups. A senior radiologist and the chief physician of sports medicine examined their patellar axial radiographs of the knee in 30° flexion using a computer imaging system, measuring LPCA, PTA, and CA. Univariate analysis of variance and Kruskal-Wallis H test were used to compare measurement data with normal distribution and non-normal distribution, respectively. Bonferroni correction was used to analyze different indicators for different groups. The area under the curve (AUC) was calculated to verify the value of LPCA in initial diagnosis of LPCS.
Study Design
Arms and Interventions
| Arm | Intervention/Treatment |
|---|---|
| Lateral patellar compression syndrome Patients diagnosed with lateral patellar compression syndrome between February 2016 and April 2019 |
Other: no intervention
This is an observation study,with no intervention
|
| patellar dislocation Patients diagnosed with patellar dislocation between February 2016 and April 2019 |
Other: no intervention
This is an observation study,with no intervention
|
| meniscus tear Patients diagnosed with meniscus tear between February 2016 and April 2019 |
Other: no intervention
This is an observation study,with no intervention
|
Outcome Measures
Primary Outcome Measures
- lateral patellar curvature angle [between 2016 and 2019]
lateral patellar curvature angle in three groups was compared
Eligibility Criteria
Criteria
Inclusion Criteria:
- Patients were diagnosed as LPCS ，MT and PD respectively
Exclusion Criteria:
- patients with ligament injury, malunion of patella fracture, free bodies in the joint, surgical contraindications, and with both knees affected.
Contacts and Locations
Locations
| Site | City | State | Country | Postal Code | |
|---|---|---|---|---|---|
| 1 | Peking University Third Hospital | Beijing | Beijing | China | 100191 |
Sponsors and Collaborators
- Peking University Third Hospital
Investigators
- Study Chair: Yang Yu-ping, Peking University Third Hospital
Study Documents (Full-Text)
None provided.More Information
Publications
None provided.- M2019464