One article on PainSci cites Almeida 2016: Patellofemoral Tracking Syndrome
PainSci commentary on Almeida 2016: ?This page is one of thousands in the PainScience.com bibliography. It is not a general article: it is focused on a single scientific paper, and it may provide only just enough context for the summary to make sense. Links to other papers and more general information are provided wherever possible.
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.
~ Paul Ingraham
original abstract †Abstracts here may not perfectly match originals, for a variety of technical and practical reasons. Some abstacts are truncated for my purposes here, if they are particularly long-winded and unhelpful. I occasionally add clarifying notes. And I make some minor corrections.
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.
- “The reliability and validity of assessing medio-lateral patellar position: a systematic review,” Toby O Smith, Leigh Davies, and Simon T Donell, Manual Therapy, 2009.
- “Patellofemoral joint kinematics in individuals with and without patellofemoral pain syndrome,” N J MacIntyre, N A Hill, R A Fellows, R E Ellis, and D R Wilson, Journal of Bone & Joint Surgery, 2006.
- “Patellar maltracking is prevalent among patellofemoral pain subjects with patella alta: An upright, weightbearing MRI study,” Saikat Pal, Thor F Besier, Gary S Beaupre, Michael Fredericson, Scott L Delp, and Garry E Gold, 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,” S Tennant, A Williams, V Vedi, C Kinmont, W Gedroyc, and D M Hunt, Knee Surgery, Sports Traumatology, Arthroscopy, 2001.
- “Associates of physical function and pain in patients with patellofemoral pain syndrome,” Sara R Piva, G Kelley Fitzgerald, James J Irrgang, Julie M Fritz, Stephen Wisniewski, Gerald T McGinty, John D Childs, Manuel A Domenech, Scott Jones, and Anthony Delitto, Archives of Physical Medicine & Rehabilitation, 2009.
- “The role of patellar alignment and tracking in vivo: the potential mechanism of patellofemoral pain syndrome,” Chen-Yi Song, Jiu-Jenq Lin, Mei-Hwa Jan, and Yeong-Fwu Lin, Physical Therapy in Sport, 2011.
This page is part of the PainScience BIBLIOGRAPHY, which contains plain language summaries of thousands of scientific papers & others sources. It’s like a highly specialized blog. A few highlights:
- No long-term effects after a three-week open-label placebo treatment for chronic low back pain: a three-year follow-up of a randomized controlled trial. Kleine-Borgmann 2022 Pain.
- Exercise and education versus saline injections for knee osteoarthritis: a randomised controlled equivalence trial. Bandak 2022 Ann Rheum Dis.
- Association of Lumbar MRI Findings with Current and Future Back Pain in a Population-based Cohort Study. Kasch 2022 Spine (Phila Pa 1976).
- A double-blinded randomised controlled study of the value of sequential intravenous and oral magnesium therapy in patients with chronic low back pain with a neuropathic component. Yousef 2013 Anaesthesia.
- Is Neck Posture Subgroup in Late Adolescence a Risk Factor for Persistent Neck Pain in Young Adults? A Prospective Study. Richards 2021 Phys Ther.