A Study on the Correlation Between Knee Osteoarthritis Score Index and Coronary Biomechanics

Chen Lianwei; Li Xiao; Yin Shilin; Sun Zhipeng; Tian Xinyu; Du Shuangqing

Abstract：Objective To analyzes the correlation between the Western Ontario and McMaster universities(WOMAC)arthritis index,coronary lower limb force line angle,and lumbar biomechanical factors in knee osteoarthritis(KOA)patients,providing new ideas for clinical diagnosis and treatment of KOA.Methods 267 KOA patients who visited the Department of Orthopedics and Traumatology at the First Affiliated Hospital of Hebei University of Chinese Medicine from October 2022 to May 2023 and met the inclusion criteria were selected.This group included 49 males and 218 females,aged 50～83 years,with an average age of(61.55±8.72)years old.X-rays of the lumbar spine combined with the full length of both lower limbs in a weight-bearing position were taken.The direction of lumbosacral deviation was observed,and the force line angle of the lower limbs in a coronal position was measured:hip-knee-ankle angle(HKA),mechanical axis deviation(MAD),joint line convergence angle(JLCA).Lumbar biomechanical factors were also measured:lumbosacral offset distance(LOD),waist-knee offset distance(WKOD).The WOMAC score and baseline data of the subjects were recorded to analyze their differences.The correlation between coronal force line angle and lumbar biomechanical factors was then evaluated.Results There is a correlation between the direction of lumbosacral deviation and the severity of KOA pain(P＜0.05,r=0.569).Furthermore,there is a correlation between LOD,WKOD,HKA,MAD,JLCA,disease duration,and WOMAC score(P＜0.05,r values are 0.585,0.579,-0.156,0.173,0.175,0.189,respectively).Conclusion There is a correlation between joint pain and functional limitation in KOA patients and the shift of the lumbar center of gravity and lower limb force line angle.The degree of joint stiffness in KOA patients is correlated with the duration of the disease,and the shift of the lumbar coronal center of gravity is one of the risk factors for inducing or exacerbating KOA.