184 / 244
183
INTRODUCTION
Many factors influence outcomes following
anterior cruciate ligament (ACL) re
construction. While much time and effort has
been spent evaluating the influence of
modifiable surgical factors such as graft choice,
tunnel locations, and surgical technique;
patient factors continue to play a large role in
determining outcomes following surgery.
Important outcomes following ACL re
construction include graft failure risk (or as
report in many studies, revision risk) and
patient-reported outcomes.
Age and activity level are well known at this
point to influence failure risk following ACL
reconstruction, with younger patients and those
with higher activity levels (particularly cutting
and pivoting sports) demonstrating higher
failure risk [1]. Other intrinsic patient factors
including posterior tibial slope, associated
meniscus tears (particularly medially), and
smoking may influence failure risk.
Many patient factors including articular
cartilage and meniscus status, body mass
index, tobacco use, and activity level may
effect patients reported outcomes following
ACL reconstruction [4].
The goal of this study is to identify and describe
the influence of patient factors on outcomes of
ACL reconstruction in the MOON cohort.
PATIENT FACTORS
AFFECTING RISK OF GRAFT
FAILURE
Patient Age
Age has long been noted to be among the
strongest predictors of graft failure risk.
Analysis of 2683 primary ACL reconstructions
from the MOON cohort with 6 year follow-up
demonstrated a 9% decrease in the odds of ACL
graft failure for every 1 year increase in patient
age at the time of ACL reconstruction [2].
Activity Level
While activity level and age are related in that
activity level tends to decrease with increasing
age, activity level (as defined with a Marc
activity score) has also been shown in the
MOON cohort to be an independent predictor
of failure risk, controlling for age. The odds of
graft failure were demonstrated in this same
IMPACT OF PATIENT FACTORS
ON OUTCOMES OF ACL
RECONSTRUCTION:
Data from the MOON Cohort
R.A. MAGNUSSEN