Department of Kinesiology, University of Connecticut, Storrs, CT, United States; Institute for Sports Medicine, University of Connecticut, Storrs, CT, United States.
School of Kinesiology and Rehabilitation Sciences, University of Central Florida, Orlando, FL, United States; Institute of Exercise Physiology and Rehabilitation Science, University of Central Florida, Orlando, FL, United States.
Musculoskelet Sci Pract. 2024 Oct;73:103167. doi: 10.1016/j.msksp.2024.103167. Epub 2024 Aug 20.
Patellofemoral pain (PFP) affects physical and psychosocial health; however, it is unclear if unilateral and bilateral PFP induce similar levels of impairments.
We aimed to compare physical activity (PA), pain self-efficacy, and disability between individuals with unilateral and bilateral PFP, and to compare these groups against pain-free controls.
Cross-sectional case-control.
Sixty-two individuals with PFP (25 unilateral and 37 bilateral) and 20 pain-free controls completed the PA assessment using an accelerometer by daily steps, light PA, and moderate-to-vigorous PA (MVPA). We also calculated variability in each PA variable. Pain self-efficacy and disability were measured using the Pain Self-Efficacy Questionnaire and Anterior Knee Pain Scale, respectively.
Individuals with bilateral PFP took fewer daily steps compared to pain-free controls (9568.1 ± 3827.0 vs. 12,285.8 ± 2821.2 steps/day; P = 0.018, Cohen d = 0.79), whereas individuals with unilateral PFP did not (11,099.2 ± 3547.1 steps/day; P = 0.503, Cohen d = 0.37). Individuals with bilateral PFP showed greater variability in MVPA compared to individuals with unilateral PFP (42.9 ± 23.1 vs. 29.0 ± 15.9; P = 0.011, Cohen d = 0.91) and pain-free controls (42.9 ± 23.1 vs. 17.6 ± 6.1; P < 0.001, Cohen d = 1.21). Individuals with unilateral and bilateral PFP similarly exhibited less time spent in MVPA, greater variability in daily steps, lower pain self-efficacy, and greater disability compared to pain-free controls (P < 0.001, Cohen d = 1.14-3.89).
Versus pain-free controls, individuals with bilateral PFP displayed greater variability in MVPA than individuals with unilateral PFP. However, it is important to note that unilateral PFP influenced time spent in MVPA, variability in daily steps, pain self-efficacy, and disability at similar levels to bilateral PFP.
髌股疼痛（PFP）会影响身体和心理社会健康；然而，尚不清楚单侧和双侧 PFP 是否会引起相似程度的损伤。
我们旨在比较单侧和双侧 PFP 患者与无疼痛对照组之间的体力活动（PA）、疼痛自我效能感和残疾程度，并比较这些组之间的差异。
横断面病例对照研究。
62 名 PFP 患者（25 名单侧和 37 名双侧）和 20 名无疼痛对照组使用加速度计完成 PA 评估，评估指标包括每日步数、低强度 PA 和中等到剧烈强度 PA（MVPA）。我们还计算了每个 PA 变量的变异性。疼痛自我效能感和残疾程度分别使用疼痛自我效能感问卷和前膝痛量表进行测量。
与无疼痛对照组相比，双侧 PFP 患者的每日步数更少（9568.1±3827.0 步/天与 12285.8±2821.2 步/天；P=0.018，Cohen d=0.79），而单侧 PFP 患者的每日步数没有差异（11099.2±3547.1 步/天；P=0.503，Cohen d=0.37）。与单侧 PFP 患者和无疼痛对照组相比，双侧 PFP 患者的 MVPA 变异性更大（42.9±23.1 与 29.0±15.9；P=0.011，Cohen d=0.91）。与无疼痛对照组相比，双侧 PFP 患者的 MVPA 变异性更大（42.9±23.1 与 17.6±6.1；P<0.001，Cohen d=1.21）。单侧和双侧 PFP 患者的 MVPA 时间、每日步数变异性、疼痛自我效能感和残疾程度均明显低于无疼痛对照组（P<0.001，Cohen d=1.14-3.89）。
与无疼痛对照组相比，双侧 PFP 患者的 MVPA 变异性大于单侧 PFP 患者。然而，需要注意的是，单侧 PFP 对 MVPA 时间、每日步数变异性、疼痛自我效能感和残疾程度的影响与双侧 PFP 相似。
