Risk factors and construction of a prediction model of knee osteoarthritis in patients with lower extremity atherosclerotic occlusive disease
Ding Ningning1, Yin Cuilin1, Cui Yuling2, Liu Jun1, Qiang Yongqian1, Yang Jian1, Zhou Li1
1Department of Radiology, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China; 2Department of Radiology, Tangdu Hospital, Air Forced Medical University, Xi'an 710038, China
Abstract:Objective This work aimed to explore the risk factors and construct a predictive model for knee osteoarthritis (KOA) in patients with atherosclerotic occlusive disease of lower extremities (ASO-LE). Methods This was a retrospective cohort study. The clinical and imaging data of 139 patients diagnosed with ASO-LE in the First Affiliated Hospital of Xi'an Jiaotong University between January 2019 and December 2021 were recorded. Among them, there were 107 males and 32 females, with an age of 47-96 (68.7±9.1) years old. The patients underwent lower extremity CT angiography (LE-CTA). The degree of lower extremity arterial stenosis was evaluated according to the anatomical blood flow fraction (ARS) score, and the degree of lower limb artery calcification was evaluated according to the score of the peripheral arterial calcification scoring system (PACSS). The 139 patients with ASO-LE were divided into two groups according to whether they combined with KOA or not: 47 patients (33.8%) were in the ASO-LE with KOA group, and 92 patients (66.2%) were in the ASO-LE without KOA group. The observation indicators were as follows: Univariate analysis was conducted for clinical baseline data such as gender, age, course of disease, history of underlying medical diseases, and LE-CTA score (i.e., ARS and PACSS score) between the with and without KOA in ASO-LE groups. (2) Variables with P <0.2 at univariate analysis were selected for multivariate binary logistic regression analysis. An ASO-LE combined with KOA risk prediction model was established according to the independent risk factors, and the sensitivity and specificity of the prediction model were evaluated with receiver operating characteristic (ROC) analysis. Results Binary logistic regression analyses showed that hyperlipidemia (X1) and PACSS ≥5 (X2) were independent risk factors for ASO-LE with KOA (OR=3.92, 2.92; 95% CI: 1.66-9.27, 1.32-6.46; all P values <0.05). The ASO-LE with KOA prediction model on the basis of the independent risk factors was logit (P)=-1.409+1.366X1+1.072 X2. The area under the ROC curve of the prediction model was 0.756, and sensitivity and specificity were 74.5% and 63.0%, respectively. Conclusion Hyperlipidemia and PACSS ≥5 are independent risk factors for patients with ASO-LE combined with KOA. The prediction model for patients with ASO-LE and KOA could enable personalized KOA risk assessment for patients with ASO-LE.
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Ding Ningning, Yin Cuilin, Cui Yuling, Liu Jun, Qiang Yongqian, Yang Jian, Zhou Li. Risk factors and construction of a prediction model of knee osteoarthritis in patients with lower extremity atherosclerotic occlusive disease. Chinese Journal of Anatomy and Clinics, 2024, 29(4): 211-215.
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