After the signing of the consent form, patients answer 2-3 questionnaires on our computers. All patients’ answers are stored directly into a database called Standardised Orthopaedic Clinical Research and Treatment Evaluation Software (SOCRATES).  All information are securely stored electronically.  At SORI, we use questionnaires that are validated and standardised to assess and analyse patients’ outcomes. The following table gives a detailed overview of which questionnaires are completed for which surgeries.


Oxford (Knee Replacements)

KOOS (Knee replacements – Dr Fritsch and Dr Parker APEX, Osteotomies)

VR-12 (Knee replacements, and osteotomies)

VR-12 (Knee replacements, and osteotomies)


After completing the questionnaires, the patients are taken into the measurement room.

Range of motion

The patient’s knee extension and flexion are measured with a goniometer for both knees.

Height and Weight


Knee Laxity (KT-1000)

The laxity of the anterior cruciate ligament (anterior and posterior translation of the tibia relative to the femur) is measured for all patients going through ACL surgeries.

The arthrometer is securely placed on the knee and 3 levels of pressures (10N, 20N and 30N) are applied. The corresponding millimetres of displacements are recorded.

How often are these measurements taken?

After the initial collection of data, we also collect follow-up data from you. This depends on your injury and surgery type, and will either coincide with your surgical consult, or you can complete the scores online.

Have any concerns?

Have we missed out collecting data from you?

Having trouble completing the online questionnaires?

Want to withdraw your participation?

Don’t hesitate to get in contact with us!