POSTER ABSTRACTS - ISAKOS

sports, for evaluating rehabilitation protocols and
to aid in the decision making process on surgery
or not. Method: One-hundred and forty-eight
patients with ACL injury completed the K-SES at
some of the following occasions: 1, 4, 6 and 12
months after ACL trauma, preoperatively, and 3, 6
and 12 months after ACL reconstruction. The K-
SES, being a self-administered questionnaire with
22 items, is grouped in four categories: 1) daily
activities 2) sports activities 3) knee function
activities and 4) knee function in the future. The
items are evaluated with an 11 grade Lickert scale.
The results from the K-SES were correlated with
the Knee Injury and Osteoarthritis Outcome Score
(KOOS) and the Tegner Physical Activity Scale.
Results: The average K-SES at the various test
occasions ranged from 3 to 9. The correlation
between K-SES and the dimension of sports
performance on KOOS was r = 0.69 at 12 months
after ACL trauma and r = 0.40 at 12 months after
ACL surgery. At these occasions the correlation
with physical activity was r = 0.42 and r = 0.34
respectively. Conclusion: It is concluded that selfefficacy
beliefs in patients with ACL injury change
during the rehabilitation process and that K-SES
correlates with sports and physical activity before
as well as after surgery. Clinical perspective:
Ongoing studies will reveal if self-efficacy beliefs
has any predictive value for rehabilitation success.
E-poster #322
Development of a New Instrument to Measure
Self-Efficacy Beliefs in Patients with an ACL
Injury
Pia Thomee, Goteborg, SWEDEN, Presenter
Mats Borjesson, Goteborg, SWEDEN
Bengt Eriksson, Goteborg, SWEDEN
Jon Karlsson, Goteborg, SWEDEN
Roland Thomee, Goteborg, SWEDEN
Peter Wahrborg, Goteborg, SWEDEN
Dept of Orthopaedics, Goteborg, SWEDEN
Self-efficacy is a belief in one’s potential ability to
carry out a task, rather than a measure of whether
or not one actually can or does perform the task.
Instruments that measure self-efficacy beliefs
have been shown to aid in the evaluation and
rehabilitation of patients with arthritis and
chronic pain. The objective of this study was to
design an instrument to measure self-efficacy
beliefs in patients with an ACL injury. The study is
part of a larger prospective project on patients
with ACL injury aiming for establishing criteria to
return to sports, for evaluating rehabilitation
protocols and to aid in the decision making
process on surgery or not.
Method: Eighty-eight patients with ACL injury
completed a first version of the Knee Self-Efficacy
Scale (K-SES). It consisted of 44 self-administered
items generated by twelve physical therapists and
two orthopaedic surgeons experienced in dealing
with ACL injuries, and two medical doctors
experienced with patients having a pain
syndrome. After item analysis a final 22 item
version of the K-SES was evaluated for test-retest
reliability, internal consistency and validity in 120
patients. The K-SES was correlated with the
instruments Multidimensional Health Locus of
Control (MHLC), Coping Strategies Questionnaire
(CSQ), SF-36 and Knee injury and Osteoarthritis
Outcome Score (KOOS). A factor analysis was also
performed on the K-SES.
Results: Good reliability (r=0.73) was established
for K-SES with an internal consistency of
Cronbachs alpha = 0.7-0.9. There was none or very
weak correlations between K-SES, MHLC and
CSQ. A very strong correlation was found between
K-SES and physical functioning as measured by
SF-36. All the dimensions on KOOS correlated
moderately weak to moderately strong with K-
SES. The factor analysis produced two factors of
importance.
Summary & Conclusion: It is concluded that the
K-SES is a reliable and valid instrument and
therefore can be recommended for measuring
self-efficacy beliefs in patients with ACL injury. In
the future, we are planning to evaluate the K-SES
in terms of predictive ability for final outcome.
E-poster #323
A Strenght Test Battery for Evaluation of Sideto-Side
Difference in Power Development in
Patients with ACL Injury
Roland Thomee, Goteborg, SWEDEN, Presenter
Camille Neeter, Goteborg, SWEDEN
Alexander Gustavsson, Goteborg, SWEDEN
Pia Thomee, Goteborg, SWEDEN
Jon Karlsson, Goteborg, SWEDEN
Dept of Orthopaedics, Goteborg, SWEDEN
The literature clearly states that muscle function,
e.g. muscle strength, is not restored within the
first year for a vast majority of patients after
anterior cruciate ligament (ACL) injury or after
ACL surgery. The literature also clearly states that
insufficiently rehabilitated ACL patients do worse
in terms of: returning to pre-injury sports level,
risk for further knee pathology or re-injury. The