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This retrospective study aims at analysing demographics and clinical, functional and biomechanical outcomes in patients after ACL injury (conservative therapy and/or surgery) in patients of different ages and healthy controls. Demographics, as well as clinical, functional and biomechanical parameters were collected between 2019 and 2022 in two research projects approved by the Ethikkommission Nordwestschweiz (EKNZ 2019-00491, EKNZ 2019-01315, EKNZ 2020-00551). The primary research question analyzes if maximal SLH distance and LSISLH distance are related to the predictors age, sex, isokinetic muscle strength and the presence of injury.
Injury of the anterior cruciate ligament (ACL) is one of the most common injuries of the knee. ACL reconstruction using auto- and allografts is still the gold-standard technique and widely used in the surgical treatment of ACL ruptures. Potential deficits in the affected leg are frequently evaluated using the limb symmetry index (LSI) calculated as performance affected side/performance unaffected side x 100. Several factors other than injury may influence single leg hop (SLH) distance and LSI such as sex, age, and muscle strength. This retrospective study aims at analysing demographics and clinical, functional and biomechanical outcomes in patients after ACL injury (conservative therapy and/or surgery) in patients of different ages and healthy controls. Demographics, as well as clinical, functional and biomechanical parameters were collected between 2019 and 2022 in two research projects approved by the Ethikkommission Nordwestschweiz (EKNZ 2019-00491, EKNZ 2019-01315, EKNZ 2020-00551)
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Data collection (demographic, clinical, functional and biomechanical outcomes in patients after ACL injury (conservative therapy and/or surgery) in patients of different ages and healthy controls) | Other | Analysis of existing data from previous research projects MechSens (EKNZ 2019-01315) and RetroBRACE I and II (EKNZ 2019-00491 and EKNZ 2020-00551) as descriptive statistics (mean, standard deviation, range) for all parameters (for female or male patients with ACL injury and healthy subjects). |
| Measure | Description | Time Frame |
|---|---|---|
| Peak value for SLH distance | Peak value for SLH distance (for female or male patients with ACL injury and healthy subjects). This test is to jump as far as possible on a single leg, without losing balance and landing firmly. The distance is measured from the start line to the heel of the landing leg. The goal is to have a less than 10% difference in hop distance between the injured limb and uninjured limb. | one time assessment at baseline |
| Leg symmetry index for SLH (LSISLH distance) | Leg symmetry index for SLH (LSISLH distance) for healthy (non-dominant/dominant side*100) and for ACL injured (ACL injured/contralateral*100). Leg symmetry index (LSI) calculated as performance affected side/performance unaffected side x 100. A commonly regarded threshold for the LSI is 90%, corresponding to a 10% deficit, which is considered physiological. | one time assessment at baseline |
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Inclusion Criteria:
Exclusion Criteria:
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All parameters of patients after ACL injuries and healthy controls assessed in the Laboratory for Functional Biomechanics, University Hospital Basel in two prior projects will be included in this study. All data were collected in research projects that had ethical approval and participants signed informed consent forms for the respective research project:
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| Name | Affiliation | Role |
|---|---|---|
| Christian Egloff, PD Dr. med. | University Hospital Basel, Clinic for Orthopedics and Traumatology | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| University Hospital Basel, Orthopedics and Traumatology | Basel | 4031 | Switzerland |
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| ID | Term |
|---|---|
| D014947 | Wounds and Injuries |
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| ID | Term |
|---|---|
| D003625 | Data Collection |
| D003710 | Demography |
| D000085542 | Functional Status |
| ID | Term |
|---|---|
| D004812 | Epidemiologic Methods |
| D008919 | Investigative Techniques |
| D017531 | Health Care Evaluation Mechanisms |
| D011787 | Quality of Health Care |
| D017530 | Health Care Quality, Access, and Evaluation |
| D011634 | Public Health |
| D004778 | Environment and Public Health |
| D011154 | Population Characteristics |
| D015991 | Epidemiologic Measurements |
| D000203 | Activities of Daily Living |
| D012046 | Rehabilitation |
| D006296 | Health Services |
| D005159 | Health Care Facilities Workforce and Services |
| D006304 | Health Status |
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