Abstract
Altered hip and knee kinematics in the frontal and transverse planes may increase
patellofemoral joint stress and contribute to the development of patellofemoral pain.
The purpose of this cross-sectional study was to evaluate the association among hip
and knee kinematics, pain, and self-reported functional status in males and females
with patellofemoral pain. 20 males and 20 females with patellofemoral pain participated
in this study. 3-dimensional hip and knee kinematics were quantified while performing
a step-down task. A visual analogue scale was used to evaluate usual knee pain. The
anterior knee pain scale was used to evaluate the knee functional score. For both
groups combined, greater usual pain was associated with greater peak hip adduction,
hip internal rotation and knee abduction (r=0.54–0.57, P<0.001). Also, modest to low correlations (r=−0.48 to − 0.37, P=0.03–0.08) were found among hip and knee kinematics and functional score. Stepwise
regression revealed that peak hip internal rotation and hip adduction were significant
predictors of pain, while peak hip adduction was the only predictor of function. Greater
hip adduction, hip internal rotation and knee abduction are associated with higher
levels of pain and reduced function in males and females with patellofemoral pain.
Key words
anterior knee pain - patella - biomechanics
