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· DOS Abstracts
PREVIOUS KNEE-INJURY AND LOW KNEE FUNCTION
SCORE INCREASE THE RISK OF FUTURE KNEE INJURY IN
ADOLESCENT FEMALE FOOTBALL
Mikkel Bek Clausen, Lars Tang, Mette Kreutzfeldt Zebis, Peter Krustrup,
Per Hölmich, Kristian Thorborg
School of Physiotherapy, Institute of Rehabilitation and Nutrition, Faculty of
Health and Technology, Metropolitan University; Arthroscopic Centre Amager,
SORC-C, Copenhagen University Hospital, Amager-Hvidovre, Denmark; Gait
Analysis Laboratory, Copenhagen University Hospital, Hvidovre, Denmark;
Department of Nutrition, Exercise and Sports (NEXS), Section of Human
Physiology, Copenhagen Centre for Team Sport and Health, University of
Copenhagen, Copenhagen, Denmark
Background:
Knee-injuries are common in adolescent female football. Severe
knee-injuries can cause persistent symptoms, potentially forcing female players
to retire from contact sport. Previous knee-injury is recognized as a risk factor
for future knee-injuries in adult football, but evidence regarding adolescent fe-
male football is scarce and contains important methodological flaws.
Purpose / Aim of Study:
The primary aim of this study was to investigate
the risk of sustaining future knee-injury in relation to previous knee-injuries.
Secondly, low Knee Osteaoarthritis Outcome Score (KOOS) was investigated as
a potential risk factor for future knee injuries.
Materials andMethods:
A population based sample of 326 girls (15-18 years)
without knee-injury at baseline, participating in a Danish Football Association
series during the spring 2012 season, was included. Self-reported data on pre-
vious knee-injury and KOOS- score were collected at baseline. Football-injuries
and football-exposures were reported weekly by answers to standardised text-
message questions followed by individual injury-interviews. A priori, previous
knee-injury and low KOOS-scores (< 80 points) were chosen as independent
variables of interest in the primary and secondary risk-factor analyses.
Findings / Results:
29 players sustained 34 time-loss knee-injuries. Adjusted
for match/total ratio and playing-level, baseline report of previous knee-injury
significantly increased the risk of time-loss knee-injury (RR: 3.65 95%CI 1.73-
7.68; p<0.001). Low baseline-score in three KOOS sub-scales (ADL, Sport/rec
and QOL) significantly increased the risk of time-loss knee-injury (RR: 2-5, p=
0.008-0.046).
Conclusions:
Previous knee-injury and KOOS subscale scores lower than 80
points in ADL, Sport/rec and QOL significantly increases the risk of sustaining a
knee-injury in adolescent female football players.
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