Establishment and evaluation of a nomogram for predicting post-hepatectomy complications in two types of hepatic echinococcosis
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摘要:
目的 通过分析两型肝包虫病肝切除术后并发症(PHC)的相关危险因素,建立预测肝包虫病PHC发生风险的列线图,并评价其临床使用价值。 方法 收集青海大学附属医院2015年1月—2020年8月收治的263例两型肝包虫病行肝切除手术患者的临床资料,并进行回顾性分析,263例患者中PHC组93例,对照组170例。非正态分布的计量资料2组间比较采用Mann-Whitney U秩和检验,正态性计量资料2组间比较采用独立样本t检验;计数资料2组间比较采用χ2检验和Fisher确切概率法。通过单因素和多因素logistic回归筛选出两型肝包虫病PHC的独立危险因素。根据独立危险因素所占权重,构建列线图预测风险模型。采用Bootstrap重采样法进行模型的内部验证、构建受试者工作特征曲线对模型的区分度进行评价、使用校准曲线和Hosmer-Lemeshow检验对模型的一致性进行评价、绘制临床决策曲线分析(DCA) 验证模型的临床有效性。 结果 ALBI评分(OR=3.694, 95%CI:1.860~7.336)、手术时间(OR=2.848,95%CI:1.384~5.859)、术中出血量(OR=4.832, 95%CI: 2.384~9.793)、包虫直径(OR=3.073,95%CI: 1.528~6.177)是两型肝包虫发生PHC的独立危险因素(P值均<0.05)。基于上述4个独立危险因素所占权重构建列线图风险预测模型,模型的受试者工作特征曲线下面积为0.877(95%CI:0.831~0.923);Bootstrap重采样法进行内部验证的一致性指数(C-index)为0.871,表明模型的区分度良好。校准曲线观测值和实际值贴合,Hosmer-Lemeshow检验(P=0.905)均显示列线图风险预测模型的预测值与实际观测值一致性良好。当阈概率为35.6%时,DCA显示的临床净获益为22%;在8%~89%阈概率区间内有较好的临床适用性。 结论 ALBI评分、手术时间、术中出血量、包虫直径是两型肝包虫病患者发生PHC的独立危险因素,以此为基础构建的列线图风险预测模型具有较好的准确度、一致性及临床实用性。 Abstract:Objective To establish a nomogram for predicting the risk of post-hepatectomy complications (PHC) in hepatic echinococcosis by analyzing the risk factors for PHC in two types of hepatic echinococcosis, and to investigate its value in clinical practice. Methods A retrospective analysis was performed for the clinical data of 263 patients with two types of hepatic echinococcosis who underwent hepatectomy in Qinghai University Affiliated Hospital from January 2015 to August 2020, and among these patients, 93 were enrolled as PHC group and 170 were enrolled as control group. The Mann-Whitney U test was used for comparison of non-normally distributed continuous data between two groups, and the independent samples t-test was used for comparison of normally distributed continuous data between two groups; the chi-square test and the Fisher's exact test were used for comparison of categorical data between two groups. Univariate and multivariate logistic regression analyses were used to screen out independent risk factors for PHC, and a nomogram risk prediction model was established based on the weight of each independent risk factor. The Bootstrap resampling method was used for internal verification of the model; the receiver operating characteristic (ROC) curve was plotted to evaluate the discriminatory ability of the model; calibration curve and the Hosmer-Lemeshow test were used to evaluate the consistency of the model; decision curve analysis (DCA) was performed to verify the clinical effectiveness of the model. Results Albumin-bilirubin (ALBI) score (odds ratio [OR]=3.694, 95% confidence interval [CI]: 1.860-7.336, P < 0.05), time of operation (OR=2.848, 95%CI: 1.384-5.859, P < 0.05), intraoperative blood loss (OR=4.832, 95%CI: 2.384-9.793, P < 0.05), and hydatid diameter (OR=3.073, 95%CI: 1.528-6.177, P < 0.05) were independent risk factors for PHC in two types of hepatic echinococcosis. A nomogram risk prediction model was established based on the weight of the above four independent risk factors, and the model had an area under the ROC curve of 0.877 (95%CI: 0.831-0.923). The model had a consistency index of 0.871 after internal verification using the Bootstrap resampling method, suggesting that the model had good discriminatory ability. The fitting of the observed value and the actual value of the calibration curve and the Hosmer-Lemeshow test (P=0.905) showed that the predicted value of the nomogram risk prediction model had good consistency with the actual observed value. When the threshold probability was 35.6%, DCA showed a net clinical benefit of 22%, and the model had good clinical applicability within the threshold probability ranging from 8% to 89%. Conclusion ALBI score, time of operation, intraoperative blood loss, and hydatid diameter are independent risk factors for PHC in patients with two types of hepatic echinococcosis, and the nomogram risk prediction model established based on these factors has good accuracy, consistency, and clinical practicability. -
Key words:
- Echinococcosis, Hepatic /
- Hepatectomy /
- Postoperative Complications /
- Risk Factors /
- Nomograms
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表 1 两型肝包虫病PHC组和对照组资料比较
指标 对照组(n=170) PHC组(n=93) 统计值 P值 年龄(岁) 37.04±13.11 38.73±12.98 t=-1.003 0.317 BMI(kg/m2) 21.61±4.31 21.39±3.36 t=0.427 0.670 APRI 0.23(0.19~0.38) 0.27(0.17~0.49) Z=-0.837 0.403 ALBI评分 -2.66(-2.91~-2.39) -2.31(-2.66~-1.87) Z=-5.333 <0.001 手术时间(min) 250(210~286) 330(287~402) Z=-8.120 <0.001 术中出血量(mL) 400(200~800) 1400(900~2100) Z=-9.310 <0.001 包虫直径(cm) 8.50(6.43~11.07) 11.98(10.02~14.24) Z=-7.227 <0.001 切除段数(例) χ2=38.941 <0.001 <3 79 8 ≥3 91 85 切除部位(例) 0.746 非肝中叶切除 164 89 肝中叶切除 6 4 胆道介入(例) χ2=39.866 <0.001 否 167 68 是 3 25 乙型肝炎(例) χ2=0.782 0.377 否 139 80 是 31 13 手术方式(例) 0.103 开腹肝切除 160 92 腹腔镜肝切除 10 1 阻断方式(例) χ2=0.637 0.425 Pringle阻断 79 48 区域阻断 91 45 表 2 两型肝包虫病PHC的单因素logistic回归分析结果
指标 β值 标准误 Wald值 OR值 95%CI P值 年龄 0.010 0.010 1.006 1.010 0.991~1.030 0.316 BMI -0.014 0.033 0.183 0.986 0.925~1.051 0.669 APRI 0.471 0.257 3.369 1.602 0.969~2.651 0.066 ALBI 2.093 0.292 51.210 8.108 4.571~14.383 <0.001 手术时间 2.087 0.302 47.786 8.058 6.898~23.144 <0.001 术中出血量 2.536 0.309 67.463 12.635 6.898~23.144 <0.001 包虫直径 2.076 0.297 48.839 7.969 4.453~14.264 <0.001 切除段数 2.222 0.401 30.773 9.224 4.207~20.222 <0.001 切除部位 0.206 0.659 0.098 1.228 0.338~4.468 0.755 胆道介入 3.019 0.628 23.127 20.466 5.980~70.039 <0.001 乙型肝炎 -0.317 0.359 0.778 0.729 0.361~1.473 0.378 手术方式 -1.749 1.057 2.739 0.174 0.022~1.380 0.098 阻断方式 -0.206 0.258 0.636 0.814 0.491~1.350 0.425 表 3 两型肝包虫病PHC的多因素logistic回归分析结果
指标 β值 标准误 Wald值 OR值 95%CI P值 ALBI 1.307 0.350 13.939 3.694 1.860~7.336 <0.001 手术时间 1.046 0.368 8.082 2.848 1.384~5.859 0.004 术中出血量 1.575 0.360 19.103 4.832 2.384~9.793 <0.001 包虫直径 1.123 0.356 9.928 3.073 1.528~6.177 0.002 常量 -3.122 0.367 72.444 0.044 <0.001 -
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