Phatama K Y, Isma Spp, Devi L K, Siahaan L D, Pribadi A, Pradana A S, Mustasir E, Hidayat M
Department of Orthopaedic and Traumatology, Universitas Brawijaya, Malang, Indonesia.
Malays Orthop J. 2022 Jul;16(2):95-101. doi: 10.5704/MOJ.2207.012.
Quadriceps angle (Q-angle) is the angle formed from the intersection of quadriceps femoris muscle and patellar tendon. Q-angle can be used to assess mechanical aspects of the patellofemoral discomfort and attracts considerable attention from clinicians. Anterior knee pain (AKP) is defined as mild pain localised around the peripatellar area exacerbated by physical activity such as climbing stairs, squatting, jumping, running, and/or sitting with the knee flexed for long periods. A higher Q-angle is one of the risk factors for AKP. In addition, several studies have found a relationship between anthropometric parameters, especially body mass index (BMI), to the occurrence of AKP. This study aims to determine the Q-angle and several anthropometric parameters between the population with AKP and without AKP in the adult population in Indonesia.
This cross-sectional, analytic experimental study was performed on female population divided into the comparison group consisted of 40 patients aged between 18-25 years with right side anterior knee pain (Kujala score <82) and the control group consisted of 40 patients aged between 18-25 years without anterior knee pain (Kujala score >82). Both groups had to be right-handed and had no history of knee fractures, knee surgery, congenital anomalies, or obesity. The Q-angle of the right knee was measured in all participants using a universal goniometer.
The mean Q-angle in the comparison group was 20.60±1.26°, and in the control group was 14.85±0.99°. All of these differences were statistically significant (p<0.001). There was no significant correlation between anthropometric parameters (body weight, body height, and body mass index) with AKP.
The Q-angle can be used to predict the risk of AKP in the female population. The greater the Q-angle the higher the risk of AKP. Anthropometric measurements cannot predict the risk of AKP.
股四头肌角（Q角）是股四头肌与髌腱相交形成的角度。Q角可用于评估髌股关节不适的力学因素，受到临床医生的广泛关注。前膝痛（AKP）定义为髌周区域局部轻度疼痛，在爬楼梯、下蹲、跳跃、跑步和/或长时间屈膝坐姿等体力活动时加重。较高的Q角是AKP的危险因素之一。此外，多项研究发现人体测量参数，尤其是体重指数（BMI）与AKP的发生之间存在关联。本研究旨在确定印度尼西亚成年人群中患有和未患有AKP的人群之间的Q角及多项人体测量参数。
本横断面分析实验研究针对女性人群进行，分为比较组和对照组。比较组由40名年龄在18至25岁之间的右侧前膝痛患者（库贾拉评分<82）组成，对照组由40名年龄在18至25岁之间无前膝痛的患者（库贾拉评分>82）组成。两组均须为右利手，且无膝关节骨折、膝关节手术、先天性异常或肥胖病史。使用通用测角仪测量所有参与者右膝的Q角。
比较组的平均Q角为20.60±1.26°，对照组为14.85±0.99°。所有这些差异均具有统计学意义（p<0.001）。人体测量参数（体重、身高和体重指数）与AKP之间无显著相关性。
Q角可用于预测女性人群中AKP的风险。Q角越大，AKP风险越高。人体测量不能预测AKP的风险。
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