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中华实验和临床感染病杂志(电子版) ›› 2023, Vol. 17 ›› Issue (02) : 117 -124. doi: 10.3877/cma.j.issn.1674-1358.2023.02.007

论著

基于血小板和淋巴细胞计数比值的列线图模型预测腹膜透析相关腹膜炎患者治疗预后的价值
郑庆发(), 白建祥, 黄成文   
  1. 516000 惠州市,惠州市中心人民医院肾内科
  • 收稿日期:2022-10-25 出版日期:2023-04-15
  • 通信作者: 郑庆发
  • 基金资助:
    惠州市科技计划项目(No. 2021WC0106407)

Value of the nomogram model combined with the ratio of platelet and lymphocyte counts in predicting the treatment prognosis of patients with peritoneal dialysis associated peritonitis

Qingfa Zheng(), Jianxiang Bai, Chengwen Huang   

  1. Department of Nephrology, Huizhou Central People’s Hospital, Huizhou 516000, China
  • Received:2022-10-25 Published:2023-04-15
  • Corresponding author: Qingfa Zheng
引用本文:

郑庆发, 白建祥, 黄成文. 基于血小板和淋巴细胞计数比值的列线图模型预测腹膜透析相关腹膜炎患者治疗预后的价值[J]. 中华实验和临床感染病杂志(电子版), 2023, 17(02): 117-124.

Qingfa Zheng, Jianxiang Bai, Chengwen Huang. Value of the nomogram model combined with the ratio of platelet and lymphocyte counts in predicting the treatment prognosis of patients with peritoneal dialysis associated peritonitis[J]. Chinese Journal of Experimental and Clinical Infectious Diseases(Electronic Edition), 2023, 17(02): 117-124.

目的

探讨血小板和淋巴细胞比值(PLR)预测腹膜透析相关腹膜炎(PDAP)患者治疗预后的价值,并建立相关列线图模型。

方法

纳入2019年1月至2021年6月于惠州市中心人民医院肾内科因PDAP而住院治疗的129例患者作为建模组,根据最终疗效,将患者分为治愈组(83例)和预后不良组(46例)。同期纳入惠州市第一人民医院因PDAP而住院治疗的113例患者作为验证组,比较两组患者一般临床资料、实验室指标以及病原菌组成的差异。多因素Logistic回归模型中获得PDAP患者治疗预后不良的独立预测因素,根据独立预测因素建立预测PDAP患者治疗预后不良风险的列线图模型,以Bootstrap法和校准曲线进行列线图模型的内外部验证,绘制决策曲线,分析独立预测指标以及联合预测模型预测PDAP患者治疗预后不良的净收益。

结果

预后不良组患者透析龄[11.23(8.44,14.57)月]显著高于治愈组[7.23(5.31,10.41)月],差异有统计学意义(Z = 5.735、P < 0.001);糖尿病肾病患者占比(69.57%)显著高于治愈组(30.12%)(χ2 = 6.165、P = 0.007),差异均有统计学意义。预后不良组患者血小板计数(t = 5.687、P < 0.001)、降钙素原(Z = 6.945、P < 0.001)、PLR(t = 7.267、P < 0.001)以及C-反应蛋白(CRP)(t = 8.221、P < 0.001)显著高于治愈组,而淋巴细胞计数[1.01(0.78,1.15)× 109/L]显著低于治愈组[1.42(1.11,1.67)× 109/L](Z = 4.467、P < 0.001),差异均有统计学意义。多因素Logistic回归分析显示,原发病(χ2 = 7.564、P = 0.014)、PLR(χ2 = 9.786、P = 0.005)及透析龄(χ2 = 8.967、P = 0.009)均为PDAP患者治疗预后不良的独立预测因素,其中PLR每增加1个单位,患者治疗预后不良的风险增加1.568倍(OR = 2.568、95%CI:2.117~2.926、P = 0.005);糖尿病肾病治疗预后不良的风险是慢性肾炎的3.265倍(OR = 3.265、95%CI:2.196~6.457、P = 0.014);透析龄每增加1个月,患者治疗预后不良的风险增加1.733倍(OR = 2.733、95%CI:2.245~3.214、P = 0.009)。基于多因素分析结果获得的3个独立预测因素,建立预测PDAP患者治疗预后不良风险的列线图模型,H-L检验结果显示,建模组和验证组PDAP患者治疗预后不良风险的预测值与实际观测值符合度良好(χ2 = 0.134、P = 0.867,χ2 = 0.214、P = 0.785),决策曲线分析结果显示,在0~0.79阈值范围内,3个独立预测指标预测PDAP患者治疗预后不良风险均具有良好的净效益,且联合预测的总体净效益高于单一指标的净效益。

结论

基于PLR建立的列线图模型用于预测PDAP患者治疗预后不良具有较高的临床价值。

Objective

To investigate the value of platelet lymphocyte ratio (PLR) in predicting the prognosis of patients with peritoneal dialysis associated peritonitis (PDAP), and to establish a nomogram model.

Methods

Total of 129 hospitalized patients with the PDAP in the Department of Nephrology, Huizhou Central People’s Hospital from January 2019 to June 2021 were included as modeling group, the patients were divided into cured group (83 cases) and poor prognosis group (46 cases) according to the final treatment effect. There were 113 patients with PDAP admitted to Huizhou the First People’s Hospital in the same period served as the validation group. The differences in clinical data, laboratory indicators and pathogenic bacteria composition between the two groups were compared, respectively. The independent predictors of poor prognosis patients with PDAP were obtained by multivariate Logistic regression model. According to the independent predictors, the nomogram model for predicting the risk of poor prognosis of patients with PDAP was established. The Bootstrap method and calibration curve were used for the internal and external verification of the nomogram model. The decision curve was drawn, and the independent predictors and the combined prediction model were analyzed to predict the net return of poor prognosis of patients with PDAP.

Results

The dialysis period of patients [11.23 (8.44, 14.57) months vs. 7.23 (5.31, 10.41) months] in poor prognosis group was significantly higher than that of the cure group (Z = 5.735, P < 0.001), and the proportion of diabetes nephropathy of patients in poor prognosis [69.57% vs. 30.12%] was significantly higher than that of the cured group (χ2 = 6.165, P = 0.007), the platelet count (t = 5.687, P < 0.001), procalcitonin (Z = 6.945, P < 0.001), PLR (t = 7.267, P < 0.001) and C-reactive protein (CRP) (t = 8.221, P < 0.001) of patients in poor prognosis group were significantly higher than those of the cured group, and the lymphocyte count of patients [1.01 (0.78, 1.15) × 109/L vs. 1.42 (1.11, 1.67) × 109/L] was significantly lower than that of patients in the cured group (Z = 4.467, P < 0.001). The results of multivariate Logistic regression analysis showed as that the primary disease (χ2 = 7.564, P = 0.014), PLR (χ2 = 9.786, P = 0.005) and dialysis period (χ2 = 8.967, P = 0.009) were all independent predictors of poor prognosis in patients with PDAP, the risk of poor prognosis increased 1.568 times with 1 unit increase in PLR (OR = 2.568, 95%CI: 2.117-2.926, P = 0.005); the risk of poor prognosis of diabetes nephropathy patients was 3.265 times that of chronic nephritis patients (OR = 3.265, 95%CI: 2.196-6.457, P = 0.014); the risk of poor treatment prognosis in patients increases by 1.733 times for every one month increase in dialysis period (OR = 2.733, 95%CI: 2.245-3.214, P = 0.009). A nomogram model was established to predict the risk of poor prognosis of patients with PDAP based on the three independent predictors obtained from the results of multivariate analysis. The H-L test results showed that the predicted value of the risk of poor prognosis of patients with PDAP in the modeling group and the validation group was in good agreement with the actual observation value (χ2 = 0.134, P = 0.867; χ2 = 0.214, P = 0.785). The analysis results of decision curve showed that within 0-0.79 threshold probability ranges, the three independent predictors had good net benefits for predicting the risk of poor prognosis for patients with PDAP, and the overall net benefits of joint prediction were higher than those of single index.

Conclusions

The nomogram model combined with PLR has high clinical value in predicting the poor prognosis of patients with PDAP.

表1 治愈组和预后不良组患者的一般资料
表2 治愈组和预后不良组患者实验室指标
表3 治愈组和预后不良组患者病原菌组成[例(%)]
表4 影响PDAP患者治疗预后的Logistic单因素回归分析
表5 影响PDAP患者治疗预后的Logistic多因素回归分析
图1 预测PDAP患者治疗预后不良风险的列线图模型
图2 建模组列线图模型的校准曲线
图3 验证组列线图模型的校准曲线
图4 原发病、PLR和透析龄预测PDAP患者治疗预后不良风险净收益率的决策曲线
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