Bodkin Stephan, Goetschius John, Hertel Jay, Hart Joe
University of Virginia, Charlottesville, Virginia, USA.
Adrian College, Adrian, Michigan, USA.
Orthop J Sports Med. 2017 Jul 26;5(7):2325967117719041. doi: 10.1177/2325967117719041. eCollection 2017 Jul.
After anterior cruciate ligament reconstruction (ACLR), relationships between objective measures of muscle function and patient-reported outcomes may change over time. Examining these measures at different time frames after surgery may help develop individualized approaches to improve post-ALCR analysis.
To examine the associations between subjective knee function and lower-extremity muscle function in individual patients at various time points after ACLR.
Descriptive laboratory study.
Fifty-one participants who underwent primary, unilateral ACLR (15 males, 36 females; mean age, 22.9 ± 4.5 years; mean height, 172.4 ± 10.1 cm; mean weight, 68.7 ± 13.1 kg) were separated into 3 groups depending on time since surgery (early, <2 years; middle, 2-5 years; late, >5 years). Subjective knee function was quantified using the International Knee Documentation Committee (IKDC) subjective knee form and the Knee injury and Osteoarthritis Outcome Score (KOOS). Isometric knee extension and flexion strength were collected at 90 deg/s. Single-leg hop performance was measured using the single hop, triple hop, cross-over hop, and 6-m timed hop. Coefficient correlations were calculated between subjective knee function and objective measures of muscle function for each group.
The early group demonstrated moderate correlations between the KOOS and unilateral measures of flexion peak torque ( = 0.514, = .035) and flexion power ( = 0.54, = .027). The middle group demonstrated the strongest correlations between the KOOS and symmetry measures of the single hop ( = 0.69, = .002) and extension work ( = 0.71, = .002) as well as unilateral measures of the triple hop ( = 0.52, = .034) and extension work ( = 0.66, = .004). The late group demonstrated strong correlations between the 6-m timed hop symmetry and the IKDC ( = 0.716, = .001) and KOOS ( = 0.71, = .001).
Patients with a post-ACLR status of less than 2 years exhibited stronger relationships with unilateral strength measures to subjective function; graft type was found to change these relationships. Patients at 2 to 5 years postsurgery demonstrated relationships with both unilateral and symmetry measures of muscle function to subjective function. Patients who were more than 5 years after ACLR exhibited strong associations between hopping symmetry and subjective function.
Future clinical guidelines for patients after ACLR may need to consider time since surgery as a potential factor.
在前交叉韧带重建术（ACLR）后，肌肉功能的客观测量指标与患者报告的结果之间的关系可能会随时间而变化。在术后不同时间框架内检查这些指标可能有助于制定个性化方法，以改善ACLR后的分析。
研究ACLR后不同时间点个体患者主观膝关节功能与下肢肌肉功能之间的关联。
描述性实验室研究。
51名接受初次单侧ACLR的参与者（15名男性，36名女性；平均年龄22.9±4.5岁；平均身高172.4±10.1厘米；平均体重68.7±13.1千克）根据术后时间分为3组（早期，<2年；中期，2 - 5年；晚期，>5年）。使用国际膝关节文献委员会（IKDC）主观膝关节表格和膝关节损伤与骨关节炎疗效评分（KOOS）对主观膝关节功能进行量化。以90度/秒的速度收集等长膝关节伸展和屈曲力量。使用单跳、三跳、交叉跳和6米定时跳来测量单腿跳性能。计算每组主观膝关节功能与肌肉功能客观测量指标之间的系数相关性。
早期组中，KOOS与单侧屈曲峰值扭矩测量值（r = 0.514，P = 0.035）和屈曲功率（r = 0.54 , P = 0.027）之间呈中度相关性。中期组中，KOOS与单跳的对称性测量值（r = 0.69 , P = 0.002）和伸展功（r = 0.71 , P = 0.002）以及三跳的单侧测量值（r = 0.52 , P = 0.034）和伸展功（r = 0.66 , P = 0.004）之间呈现出最强的相关性。晚期组中，6米定时跳对称性与IKDC（r = 0.716 , P = 0.001）和KOOS（r = 0.71 , P =
