胱抑素C联合颈动脉斑块评分提高胸痛者严重冠心病的预测能力

摘要

目的:利用血浆胱抑素C浓度(Cyst-C)、颈动脉斑块评分(PS)预测胸痛患者严重冠心病(SCAD)的存在.方法:按入选标准回顾性收集192例胸痛患者,根据冠脉造影结果分为SCAD组(共128例)和非严重冠心病(NSCAD)组(共64例),统计分析Cyst-C与PS同SCAD的关系及对其预测能力.结果:Logistic回归分析提示Cyst-C、PS是SCAD的独立预测因子,Cyst-C每增加1 mg/L,PS每增加1 mm,其优势比(OR)分别是1.329与1.197.受试者工作(ROC)曲线分析提示以Cyst-C、PS预测SCAD的曲线下面积(AUC)分别是0.654与0.688,联合两者可提高AUC至0.742,与Cyst-C及PS单项的AUC相比,差异均有统计学意义(P值分别是0.046,0.004).Cyst-C、PS的最佳截断点分别是0.95 mg/L、3 mm,其对SCAD预测的敏感性分别是72.3%,70.7%;阴性预测值分别是46.3%,48.3%;联合两者,敏感性与阴性预测值均增高(分别是83.6%,62.5%).结论:Cyst-C及PS与SCAD相关,均是胸痛者SCAD的独立预测因子,联合两者能提高预测能力,增加心导管术前筛查SCAD的可靠性.%Objective To assess the value of plasma level of cystatin C(Cyst-C)and carotid artery plaque score(PS)in predicting significant coronary artery disease(SCAD)in patients with chest pain. Methods A total of 192 patients with chest pain were involved retrospectively. According to the coronary angiography results ,the patients were divided into groups of SCAD (n = 128) and non-significant coronary artery disease (NSCAD , n = 64). Analyses were done to discuss the association of Cyst-C and PS with SCAD and the predictive value of Cyst-C and PS for SCAD. Results Logistic regression analysis demonstrated that Cyst-C and PS were independent predictors of SCAD. The odds ratios(OR)associated with the Cyst-C(each 1 mg/L)and PS(each 1 mm)for prediction of SCAD were 1.329 and 1.197,respectively. The areas under the receiver-operating characteristic curves(AUC)for the Cyst-C and the PS to predict the SCAD were 0.654 and 0.688,respectively. The combination of Cyst-C and PS increased the AUC to 0.742. The optimal cut-off value of Cyst-C was 0.95 mg/L and had a sensitivity of 72.3% for SCAD. Similarly,the optimal cut-off level of PS was 3mm which presented a sensitivity of 70.7%. A Cyst-C ≥ 0.95 mg/L and a PS ≥ 3 mm had negative predictive values of 46.3% and 48.3%,respectively,for SCAD. By combining Cyst-C with PS ,the sensitivity and negative predictive value increased to 83.6%and 62.5%, respectively. Conclusions Cyst-C and PS are both correlated with SCAD. They are independent predictive factors for SCAD in patients with chest pain. Combination of Cyst-C and PS can improve the predictability ,which may increase the reliability of screening SCAD before cardiac catheterization.