Development and validation of a coagulation factor-based risk prediction model for hypertensive disorders of pregnancy
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摘要:
目的 为提升妊娠期高血压疾病(HDP)的早期识别能力,本研究聚焦于凝血功能这一潜在预测维度,旨在系统评估凝血功能指标对HDP的预测价值,并以此为基础构建一个可用于临床风险评估的预测模型。 方法 回顾性纳入2020年1月—2023年12月东莞市厚街医院收治的533名孕妇(HDP组426例,非HDP组107例),采集孕妇凝血功能、肾功能、BMI、年龄等指标。通过单因素和多因素logistic回归筛选预测因子并构建列线图模型;采用受试者工作特征曲线(ROC)、校准曲线、决策曲线分析(DCA)及精确率-召回率曲线(PR)进行模型评估。 结果 多因素分析显示,高龄(≥35岁)、BMI≥25、尿蛋白阳性为HDP的独立危险因素,活化部分凝血活酶时间(APTT)和肌酐水平升高为保护因素。模型ROC曲线下面积为0.847(95% CI:0.810~0.884),校准曲线接近理想对角线,DCA显示在阈值概率0.25~0.75范围内具有显著临床净获益。 结论 基于APTT、高龄、BMI、尿蛋白和肌酐构建的列线图模型对HDP具有良好的预测效能,可为临床早期识别高危人群提供便捷、经济的量化工具。 Abstract:Objective To improve the early identification of hypertensive disorders of pregnancy (HDP), this study focused on coagulation function as a potential predictive dimension. We aimed to systematically evaluate the predictive value of coagulation indicators for HDP and to develop a clinically applicable risk assessment model based on these findings. Methods A retrospective study included 533 pregnant women admitted to Houjie Hospital, Dongguan from January 2020 to December 2023 (426 in the HDP group and 107 in the non-HDP group). Indicators including coagulation function, renal function, BMI, and age were collected. Predictive factors were screened through univariate and multivariate logistic regression to develop a nomogram model. Model performance was evaluated using receiver operating characteristic (ROC) curves, calibration curves, decision curve analysis (DCA), and precision-recall curves (PR). Results Multivariate analysis identified advanced maternal age (≥35 years), BMI ≥25, and proteinuria as independent risk factors for HDP, while elevated activated partial thromboplastin time (APTT) and creatinine were protective factors. The model achieved an area under the ROC curve (AUC) of 0.847 (95% CI: 0.810-0.884), with calibration curves close to the ideal diagonal and DCA demonstrating significant clinical net benefit within the threshold probability range of 0.25-0.75. Conclusion The nomogram model incorporating APTT, advanced maternal age, BMI, proteinuria, and creatinine demonstrated good predictive performance for HDP, providing a convenient and economical quantitative tool for early identification of high-risk populations in clinical practice. -
表 1 2组孕妇临床资料比较
Table 1. Comparison of clinical data between the two groups of pregnant women
项目 HDP组
(n=426)非HDP组
(n=107)统计量 P值 年龄(<35岁/≥35岁,例) 302/124 87/20 4.706a 0.030 凝血功能[例(%)] 423(80.0) 106(20.0) 0.999d PT[M(P25, P75),s] 10.5(10.0, 10.9) 10.6(10.3, 10.9) -2.274b 0.023 APTT(x±s,s) 27.0±2.6 25.6±2.0 5.936c <0.001 TT[M(P25, P75),s] 16.5(15.8, 17.1) 16.8(16.4, 17.1) -3.025b 0.002 Fib[M(P25, P75),g/L] 4.2(3.7, 4.8) 4.2(3.8, 4.6) 0.218b 0.640 D-二聚体[M(P25, P75),mg/L] 2.2(1.3, 3.2) 4.1(2.1, 5.6) -2.473b 0.013 R[M(P25, P75),分] 3.1(2.5, 3.8) 3.8(2.9, 4.3) -2.158b 0.031 K[M(P25, P75),分] 1.4(1.2, 1.8) 1.4(1.2, 1.7) -0.322b 0.748 α角[M(P25, P75),°] 73.0(68.1, 75.1) 72.5(69.7, 74.5) 0.382b 0.703 MA[M(P25, P75),ms] 68.3(64.3, 71.6) 67.3(62.5, 71.3) 0.544b 0.587 CI[M(P25, P75)] 3.3(2.3, 4.3) 2.8(1.9, 3.9) 1.366b 0.172 BMI(<25/≥25,例) 284/142 97/10 24.139a <0.001 尿蛋白(阴性/阳性,例) 259/150 94/12 25.098a <0.001 肌酐[M(P25, P75),μmol/L] 57.0(50.0, 65.0) 47.0(44.0, 53.0) 7.923b <0.001 尿酸[M(P25, P75),μmol/L] 400.5(333.1, 471.8) 347.7(296.5, 411.9) 4.721b <0.001 尿素氮[M(P25, P75),mmol/L] 3.5(2.8, 4.4) 3.0(2.5, 3.6) 4.353b <0.001 注:由于部分数据缺失,部分变量的有效样本量不同(凝血功能、D-二聚体、血栓弹力图、尿蛋白、肾功能);a为χ2值,b为Z值,c为t值, d为采用Fisher精确检验。 表 2 HDP影响因素的logistic回归分析
Table 2. Logistic regression results of the HDP prediction model
变量 B SE Waldχ2 P值 OR(95% CI) APTT -0.255 0.067 14.414 <0.001 0.775(0.679~0.884) BMI 1.625 0.376 18.716 <0.001 5.077(2.432~10.599) 尿蛋白 1.383 0.357 14.995 <0.001 3.986(1.980~8.025) 肌酐 -0.085 0.015 32.497 <0.001 0.919(0.893~0.946) 高龄 0.775 0.319 5.917 0.015 2.170(1.162~4.051) 注:二元多因素logistic回归中Hosmer-Lemeshow P=0.16,其中是HDP赋值为1,非HDP赋值为0。BMI<25赋值0,≥25赋值1;尿蛋白阴性赋值0,阳性赋值1;年龄<35岁赋值0,≥35岁赋值1,并定义为高龄;其余连续性变量以实际值赋值;本表仅列出差异有统计学意义的变量。 -
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