Patellofemoral pain syndrome is a descriptive term applied to patients with
nonspecific anterior knee pain, and is the most common knee problem. The pain in most
patellofemoral disorders is generalized to the anterior part of the knee. One important concept in
patellofemoral joint function is the quadriceps angle (Q-angle). Theoretically, a higher Q-angle
increases the lateral pull of the quadriceps femoris muscle on the patella and potentiates
patellofemoral disorders. This study was undertaken to evaluate the relationship between the
anterior knee pain and Q-angle.