Abstract：
BACKGROUND: Patellofemoral pain (PFP) is a prevalent chronic condition characterized by retropatellar or peripatellar pain exacerbated by various knee flexion-based activities. Previous research has highlighted the impact of psychological constructs on pain and function in chronic musculoskeletal pain conditions, yet their influence on physical activity in PFP cohorts remains unexplored. We aimed to evaluate whether pain self-efficacy and pain catastrophizing predict variations in steps per day and moderate to vigorous physical activity (MVPA) among individuals with PFP.
METHODS: Cross-sectional observational study.
METHODS: Thirty-nine participants (11 males) with PFP were included. Dependent variables were steps per day and minutes of MVPA. Independent variables were pain self-efficacy and pain catastrophizing, measured by the pain self-efficacy questionnaire and the pain catastrophizing scale. Participants were given an ActiGraph wGT3X-BT for 7 days to assess physical activity. Correlations were assessed between psychological measures and physical activity, and a simple linear regression was performed on psychological variables that correlated with physical activity. Alpha was set a priori at P < .05.
RESULTS: Pain self-efficacy scores displayed a moderate association with steps per day (rho = .45, P = .004) and a weak association with MVPA (rho = .38, P = .014). Pain catastrophizing scores exhibited no significant associations with physical activity (P < .05). Regression models affirmed pain self-efficacy scores as significant predictors of both steps per day (F1,37 = 10.30, P = .002) and MVPA (F1,37 = 8.98, P = .004).
CONCLUSIONS: Psychological measures continue to demonstrate value to clinicians treating PFP. Pain self-efficacy scores were moderately associated with steps per day and weakly associated with MVPA, explaining nearly a fifth of the variation in physical activity. Clinicians should prioritize the assessment of pain self-efficacy when treating individuals with PFP, potentially employing psychological interventions to improve physical activity in the PFP population.
METHODS: Cross-sectional observational study.
METHODS: Thirty-nine participants (11 males) with PFP were included. Dependent variables were steps per day and minutes of MVPA. Independent variables were pain self-efficacy and pain catastrophizing, measured by the pain self-efficacy questionnaire and the pain catastrophizing scale. Participants were given an ActiGraph wGT3X-BT for 7 days to assess physical activity. Correlations were assessed between psychological measures and physical activity, and a simple linear regression was performed on psychological variables that correlated with physical activity. Alpha was set a priori at P < .05.
RESULTS: Pain self-efficacy scores displayed a moderate association with steps per day (rho = .45, P = .004) and a weak association with MVPA (rho = .38, P = .014). Pain catastrophizing scores exhibited no significant associations with physical activity (P < .05). Regression models affirmed pain self-efficacy scores as significant predictors of both steps per day (F1,37 = 10.30, P = .002) and MVPA (F1,37 = 8.98, P = .004).
CONCLUSIONS: Psychological measures continue to demonstrate value to clinicians treating PFP. Pain self-efficacy scores were moderately associated with steps per day and weakly associated with MVPA, explaining nearly a fifth of the variation in physical activity. Clinicians should prioritize the assessment of pain self-efficacy when treating individuals with PFP, potentially employing psychological interventions to improve physical activity in the PFP population.
摘要：
背景：髌股疼痛（PFP）是一种常见的慢性疾病，其特征是各种基于膝关节屈曲的活动加剧了髌骨后或髌周疼痛。先前的研究强调了心理结构对慢性肌肉骨骼疼痛状况下疼痛和功能的影响，然而，它们对PFP队列中体力活动的影响仍未被探索。我们旨在评估疼痛自我效能感和疼痛灾难是否可以预测PFP患者每天步数的变化以及中度至剧烈的体育锻炼（MVPA）。
方法：横断面观察性研究。
方法：纳入了39名PFP患者（11名男性）。因变量是每天的步骤和MVPA的分钟数。独立变量是疼痛自我效能感和疼痛灾难，通过疼痛自我效能感问卷和疼痛灾难感量表进行测量。参与者被给予ActiGraphwGT3X-BT7天以评估身体活动。评估了心理措施和身体活动之间的相关性，并对与身体活动相关的心理变量进行了简单的线性回归。α被先验地设定为P<.05。
结果：疼痛自我效能评分显示出与每天步数的中度关联（rho=.45，P=.004），与MVPA的弱关联（rho=.38，P=.014）。疼痛灾难评分与体力活动无显著相关性（P<0.05）。回归模型确认疼痛自我效能评分是每天两个步骤（F1,37=10.30，P=0.002）和MVPA（F1,37=8.98，P=0.004）的显着预测因子。
结论：心理措施继续证明临床医生治疗PFP的价值。疼痛自我效能评分与每天的步数中度相关，与MVPA弱相关，解释了近五分之一的体力活动变化。临床医生在治疗PFP患者时，应优先评估疼痛自我效能感，可能采用心理干预措施来改善PFP人群的体育锻炼。
方法：横断面观察性研究。
方法：纳入了39名PFP患者（11名男性）。因变量是每天的步骤和MVPA的分钟数。独立变量是疼痛自我效能感和疼痛灾难，通过疼痛自我效能感问卷和疼痛灾难感量表进行测量。参与者被给予ActiGraphwGT3X-BT7天以评估身体活动。评估了心理措施和身体活动之间的相关性，并对与身体活动相关的心理变量进行了简单的线性回归。α被先验地设定为P<.05。
结果：疼痛自我效能评分显示出与每天步数的中度关联（rho=.45，P=.004），与MVPA的弱关联（rho=.38，P=.014）。疼痛灾难评分与体力活动无显著相关性（P<0.05）。回归模型确认疼痛自我效能评分是每天两个步骤（F1,37=10.30，P=0.002）和MVPA（F1,37=8.98，P=0.004）的显着预测因子。
结论：心理措施继续证明临床医生治疗PFP的价值。疼痛自我效能评分与每天的步数中度相关，与MVPA弱相关，解释了近五分之一的体力活动变化。临床医生在治疗PFP患者时，应优先评估疼痛自我效能感，可能采用心理干预措施来改善PFP人群的体育锻炼。
