Division of Physiotherapy, School of Health and Rehabilitation Sciences, The University of Queensland, Brisbane, Queensland, Australia; La Trobe Sport and Exercise Medicine Research Centre, College of Science, Health and Engineering, La Trobe University, Melbourne, Victoria, Australia.
Department of Radiology and Nuclear Medicine, Erasmus MC University Medical Center, Rotterdam, the Netherlands.
Knee. 2021 Jan;28:104-109. doi: 10.1016/j.knee.2020.10.009. Epub 2020 Dec 14.
Sitting-related pain is a common feature of patellofemoral pain (PFP). However, little is known regarding features associated with sitting-related PFP. The aim of this study was to determine whether sitting-related PFP is associated with patellofemoral alignment, morphology and structural magnetic resonance imaging (MRI) features of the patellofemoral joint (cartilage lesions, bone marrow lesions, fat pad synovitis).
133 individuals with PFP were included from two unique but similar cohorts. Participants were classified into one of three groups based on their response to item 8 of the Anterior Knee Pain Scale: (i) problems with sitting; (ii) sitting pain after exercise; and (iii) no difficulty with sitting. All participants underwent 3T Magnetic Resonance Imaging (MRI) to enable: (i) scoring of structural features of the patellofemoral joint with MRI Osteoarthritis Knee Score (MOAKS); and (ii) patellofemoral alignment and morphology measurements using standardised methods. The association of sitting pain to bony alignment, morphology and MOAKS features were evaluated using multinomial logistic regression (adjusted for age, sex, BMI; reference group = no difficulty with sitting).
82 (61.7%) participants reported problems with sitting, and 24 (18%) participants reported sitting pain after exercise. There were no significant associations between the presence of sitting pain and any morphology, alignment or structural characteristics.
Findings indicate that PFP related to sitting is not associated with patellofemoral alignment, morphology, or structural MRI features of the patellofemoral joint. Further research to determine mechanisms of sitting-related PFP, and inform targeted treatments, are required.
与坐相关的疼痛是髌股疼痛（PFP）的常见特征。然而，对于与坐相关的 PFP 的相关特征知之甚少。本研究旨在确定与坐相关的 PFP 是否与髌股排列、形态和髌股关节的结构磁共振成像（MRI）特征（软骨损伤、骨髓病变、脂肪垫滑膜炎）相关。
本研究纳入了来自两个独特但相似队列的 133 名 PFP 患者。参与者根据他们对前膝痛量表第 8 项的反应分为三组：（i）有坐的问题；（ii）运动后坐痛；和（iii）坐无困难。所有参与者均接受了 3T 磁共振成像（MRI）检查，以便：（i）使用 MRI 骨关节炎膝关节评分（MOAKS）对髌股关节的结构特征进行评分；和（ii）使用标准方法对髌股排列和形态进行测量。使用多项逻辑回归（调整年龄、性别、BMI；参考组=坐无困难）评估坐痛与骨性排列、形态和 MOAKS 特征的关系。
82 名（61.7%）参与者报告有坐的问题，24 名（18%）参与者报告运动后坐痛。坐痛的存在与任何形态、排列或结构特征均无显著相关性。
研究结果表明，与坐相关的 PFP 与髌股排列、形态或髌股关节的结构 MRI 特征无关。需要进一步研究以确定与坐相关的 PFP 的机制，并为有针对性的治疗提供信息。
