Park Samel, Hong Min, Lee HwaMin, Cho Nam-Jun, Lee Eun-Young, Lee Won-Young, Rhee Eun-Jung, Gil Hyo-Wook
Department of Internal Medicine, Soonchunhyang University Cheonan Hospital, Cheonan 31151, Korea.
Department of Software Convergence, Soonchunhyang University, Asan 31538, Korea.
J Clin Med. 2021 Jan 25;10(3):457. doi: 10.3390/jcm10030457.
Coronary artery calcification (CAC) is a feature of coronary atherosclerosis and a well-known risk factor for cardiovascular disease (CVD). As the absence of CAC is associated with a lower incidence rate of CVD, measurement of a CAC score is helpful for risk stratification when the risk decision is uncertain. This was a retrospective study with an aim to build a model to predict the presence of CAC (i.e., CAC score = 0 or not) and evaluate the discrimination and calibration power of the model. Our data set was divided into two set (80% for training set and 20% for test set). Ten-fold cross-validation was applied with ten times of interaction in each fold. We built prediction models using logistic regression (LRM), classification and regression tree (CART), conditional inference tree (CIT), and random forest (RF). A total of 3,302 patients from two cohorts (Soonchunhyang University Cheonan Hospital and Kangbuk Samsung Health Study) were enrolled. These patients' ages were between 40 and 75 years. All models showed acceptable accuracies (LRM, 70.71%; CART, 71.32%; CIT, 71.32%; and RF, 71.02%). The decision tree model using CART and CIT showed a reasonable accuracy without complexity. It could be implemented in real-world practice.
冠状动脉钙化(CAC)是冠状动脉粥样硬化的一个特征,也是心血管疾病(CVD)的一个众所周知的危险因素。由于无CAC与较低的CVD发病率相关,因此当风险决策不确定时,测量CAC评分有助于进行风险分层。这是一项回顾性研究,旨在建立一个预测CAC存在情况(即CAC评分=0与否)的模型,并评估该模型的辨别力和校准能力。我们的数据集被分为两组(80%作为训练集,20%作为测试集)。采用十折交叉验证,每折进行十次交互。我们使用逻辑回归(LRM)、分类与回归树(CART)、条件推断树(CIT)和随机森林(RF)建立预测模型。总共纳入了来自两个队列(顺天乡大学天安医院和江北三星健康研究)的3302名患者。这些患者的年龄在40至75岁之间。所有模型都显示出可接受的准确率(LRM为70.71%;CART为71.32%;CIT为71.32%;RF为71.02%)。使用CART和CIT的决策树模型显示出合理的准确率且不复杂。它可以在实际应用中实施。