This study looks at two different types of tendon (tissue) used in knee surgery to repair a torn anterior cruciate ligament (ACL), which is a common injury in active people. The two types are taken from different muscles in the thigh: one from the front (quadriceps) and one from the back (semitendinosus). We will use information already collected in a national health registry to see how patients recover after surgery. The study will compare knee function, activity level, and how often patients need another operation.
Primary ACL reconstruction registered in the Danish Knee Ligament Reconstruction Registry (DKRR)
Known graft type: quadriceps tendon or semitendinosus tendon Minimum 1-year follow-up with completed patient-reported outcome measures (KOOS and/or Tegner score)
Age between 15 and 50 years at the time of surgery (optional subgroup analysis)
Revision ACL reconstruction
Multiligament knee reconstruction
Missing or incomplete PROMs or key clinical data
Patients registered in the Danish Knee Ligament Reconstruction Registry (DKRR) who underwent primary anterior cruciate ligament reconstruction using either a quadriceps tendon graft or a semitendinosus tendon graft. All included patients have completed at least one year of follow-up and patient-reported outcome measures. The population consists of physically active individuals aged 15 to 50 years.
Cohort
Retrospective
Not listed
The Knee Injury and Osteoarthritis Outcome Score (KOOS)
The Knee Injury and Osteoarthritis Outcome Score (KOOS) evaluates pain, symptoms, daily living, sport/recreation, and knee-related quality of life. Metric type: continuous PROM-based subscale score Method of measurement: Self reported questionnaire
Tegner Activity Score
Assesses patients' level of physical activity before injury and at follow-up. Metric type: Scale from 0-10, where 0 is no physical activity caused by knee problems and 10 is an ability to compete in elite level sport like soccer and ski. Method of measurement: Tegner scale, self reported
Re-operation rate
Incidence of surgical re-intervention after primary ACL reconstruction. Method of measurement: Registry recorded re-operations in DKRR
Postoperative complications
Frequency of postoperative complications such as infection, stiffness, or graft failure. Metric type: Occurrence of postoperative complications Method of measurement: Clinically reported and registry documented complications in DKRR
Patient satisfaction
Overall patient satisfaction with surgical outcome, if available in registry. Metric type: PROM's available from the DKRR Method of measurement: Patient reported satisfaction score.
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Abdirahman Hassan Omar
Lead sponsor
Søernes Privathospital
Sponsor institution
Søernes Privathospital
Collaborator
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