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再狭窄仍是当前经皮穿刺冠脉腔内成形术(PTCA)的一个重要的限制因素。本文研究临床变量能否预测再狭窄,以此建立预测模型,然后验证之。方法资料来源于Emory大学的临床数据库。除外曾作冠脉手术以及在急性心梗期施行过PTCA的患者,共有4006例患者本PTCA成功后复查冠脉造影.并把患者随机分成探索组(2500例)和验证组(1506例)。再狭窄的定义为在首次扩张部位内径再次狭窄>5O％或者内径的扩大减少50％。应用逐步Logistic回归法确定在探索组中狭再窄的相关因素,建立预测再狭窄概率的
Restenosis remains an important limiting factor in current percutaneous transluminal coronary angioplasty (PTCA). This article examines whether clinical variables can predict restenosis to establish a predictive model that can then be validated. Methods Data were obtained from Emory University’s clinical database. In addition to coronary artery surgery and patients undergoing PTCA during acute myocardial infarction, 4006 patients underwent PTCA after successful coronary angiography, and patients were randomly assigned to exploratory group (2500 patients) and validation group (1506 patients). Restenosis is defined as a restenosis of> 50% in the first expansion or a 50% reduction in the expansion of the internal diameter. Stepwise logistic regression was used to determine the narrowing and narrowing factors in the exploration group and the probability of predicting restenosis