1 对象与方法
1.1 研究对象
1.2 病例纳入及排除标准
1.3 方法
1.3.1 临床资料收集及血液、BALF标本采集
1.3.2 标本检测
1.4 样本量估计
1.5 统计学处理
2 结果
2.1 MPP组和SMPP组患儿的一般人口学资料及实验室指标比较
表1 MPP组和SMPP组患儿的一般人口学资料及实验室指标比较Table 1 Comparison of general demographic data and laboratory indicators in children between the MPP and SMPP groups |
| 项 目 | MPP组(n=45) | SMPP组(n=39) | χ 2/t/Z值 | P值 |
|---|---|---|---|---|
| 性别(男/女)/n | 21/24 | 20/19 | 0.18 | 0.670 |
| 年龄/岁 | 6.02±3.00 | 6.38±2.75 | -0.57 | 0.570 |
| 白细胞/(×109/L) | 7.91±2.55 | 11.33±5.53 | -3.54 | <0.001 |
| 中性粒细胞/% | 62(55,69) | 72(66,76) | -4.23 | <0.001 |
| CRP/(mg/L) | 9.16(4.49,12.97) | 27.97(15.68,50.34) | -6.00 | <0.001 |
| D-二聚体/(mg/L) | 0.55(0.36,0.75) | 1.17(0.68,2.91) | -4.75 | <0.001 |
| LDH/(U/L) | 300.69±68.95 | 369.67±119.86 | -3.17 | 0.002 |
2.2 NETs质量浓度在MPP组与SMPP组血清中的比较及在SMPP患儿健侧肺、患侧肺BALF中的比较
图1 NETs质量浓度在MPP组与SMPP组血清中及在SMPP患儿健侧肺、患侧肺BALF中的比较注:A为MPP组、SMPP组患儿血清NETs质量浓度比较;B为SMPP组患儿的健侧肺、患侧肺NETs质量浓度比较;***P < 0.001。 Figure 1 Comparison of NETs mass concentrations in serum between the MPP group, SMPP group and those in BALF between the healthy lung and affected lung of children with SMPP |
2.3 SMPP组患儿BALF与血清中的NETs质量浓度差异及相关性分析
2.4 SMPP 影响因素的Logistic 回归分析
表2 SMPP 影响因素的Logistic 回归分析Table 2 Logistic regression analysis of the influencing factors of SMPP |
| 指 标 | β | SE | Wald χ 2值 | P值 | OR | 95%CI |
|---|---|---|---|---|---|---|
| CRP | 0.155 | 0.063 | 6.030 | 0.014 | 1.168 | 1.032~1.321 |
| LDH | 0.014 | 0.006 | 5.284 | 0.022 | 1.014 | 1.002~1.026 |
| 血清NETs | 0.863 | 0.253 | 11.684 | 0.001 | 2.371 | 1.445~3.891 |
2.5 血清NETs质量浓度对SMPP的预测价值分析
表3 血清 NETs、CRP、LDH及三者联合预测 SMPP的 ROC 分析结果Table 3 ROC curve analysis results of serum NETs, CRP, LDH and their combined for prediction of SMPP |
| 指 标 | AUC | 95%CI | 截断值 | 约登指数 | 灵敏度 | 特异度 | P值 |
|---|---|---|---|---|---|---|---|
| 血清NETs | 0.892 | 0.810~0.963 | 17.24 | 0.696 | 0.821 | 0.875 | <0.001 |
| CRP | 0.892 | 0.712~0.907 | 15.10 | 0.645 | 0.795 | 0.850 | <0.001 |
| LDH | 0.684 | 0.567~0.800 | 318.00 | 0.374 | 0.641 | 0.733 | 0.010 |
| 血清NETs+CRP+LDH | 0.974 | 0.946~1.000 | 0.54 | 0.873 | 0.923 | 0.950 | <0.001 |
图3 血清 NETs、CRP、LDH及三者联合预测 SMPP 的 ROC 曲线Figure 3 ROC curves of serum NETs, CRP, LDH and their combined for prediction of SMPP |
表4 NETs、CRP、LDH及三者联合诊断的 ROC AUC比较Table 4 Comparison of ROC AUC of NETs, CRP, LDH and their combined for SMPP diagnosis |
| 诊断指标 | Z值 | P值 | AUC 差异 | 标准误 | 95% CI |
|---|---|---|---|---|---|
| 血清NETs vs. CRP | -0.103 | 0.918 | -0.005 | 0.272 | -0.109~0.098 |
| 血清NETs vs. LDH | 2.520 | 0.012 | 0.199 | 0.318 | 0.044~0.354 |
| 血清NETs vs. 联合 | -2.369 | 0.018 | -0.088 | 0.231 | -0.160~0.015 |
| CRP vs. LDH | 3.039 | 0.002 | 0.204 | 0.308 | 0.073~0.336 |
| CRP vs. 联合 | -2.663 | 0.008 | -0.082 | 0.220 | -0.143~0.022 |
| LDH vs. 联合 | -4.922 | <0.001 | -0.287 | 0.273 | -0.401~0.173 |
注: 联合指血清NETs、 CRP与LDH联合诊断。 |