Q-angle in patellofemoral pain: relationship with dynamic knee valgus, hip abductor torque, pain and function
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In this study of 22 women with patellofemoral pain, the steepness of their Q-angle did not correlate with pain, function, hip strength, or wonky knee movement in flexion. This adds to the now substantial pile of evidence that the Q-angle in itself has little or nothing to do with patellofemoral pain.
original abstract
OBJECTIVE: To investigate the relationship between the q-angle and anterior knee pain severity, functional capacity, dynamic knee valgus and hip abductor torque in women with patellofemoral pain syndrome (PFPS).
METHODS: This study included 22 women with PFPS. The q-angle was assessed using goniometry: the participants were positioned in dorsal decubitus with the knee and hip extended, and the hip and foot in neutral rotation. Anterior knee pain severity was assessed using a visual analog scale, and functional capacity was assessed using the anterior knee pain scale. Dynamic valgus was evaluated using the frontal plane projection angle (FPPA) of the knee, which was recorded using a digital camera during step down, and hip abductor peak torque was recorded using a handheld dynamometer.
RESULTS: The q-angle did not present any significant correlation with severity of knee pain (r = -0.29; p = 0.19), functional capacity (r = -0.08; p = 0.72), FPPA (r = -0.28; p = 0.19) or isometric peak torque of the abductor muscles (r = -0.21; p = 0.35).
CONCLUSION: The q-angle did not present any relationship with pain intensity, functional capacity, FPPA, or hip abductor peak torque in the patients with PFPS.
related content
- “The reliability and validity of assessing medio-lateral patellar position: a systematic review,” an article in Manual Therapy, 2009.
- “Patellofemoral joint kinematics in individuals with and without patellofemoral pain syndrome,” an article in Journal of Bone & Joint Surgery, 2006.
- “Patellar maltracking is prevalent among patellofemoral pain subjects with patella alta: An upright, weightbearing MRI study,” an article in Journal of Orthopaedic Research, 2013.
- “Patello-femoral tracking in the weight-bearing knee: a study of asymptomatic volunteers utilising dynamic magnetic resonance imaging: a preliminary report,” an article in Knee Surgery, Sports Traumatology, Arthroscopy, 2001.
- “Associates of physical function and pain in patients with patellofemoral pain syndrome,” an article in Archives of Physical Medicine & Rehabilitation, 2009.
- “The role of patellar alignment and tracking in vivo: the potential mechanism of patellofemoral pain syndrome,” an article in Physical Therapy in Sport, 2011.
One article on PainScience.com cites Almeida 2016 as a source:
- PS Patellofemoral Tracking Syndrome — The beating heart of the conventional wisdom about patellofemoral pain is mostly nonsense
