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·544 · 南 京 医 科 大 学 学 报 2026年4月
表2 CSFP组与正常组血液学指标比较
Table 2 Comparison of routine laboratory parameters between the CSFP group and the control group
Characteristic Normal group(n=42) CSFP group(n=69) z/t/χ 2 SMD P
GDF⁃15[ng/L,M(P25,P75)] 745.14(585.43,812.41) 957.01(716.27,1 373.16) -4.14 0.979 <0.001
Tn⁃Ⅰ[μg/L,M(P25,P75)] 000.01(0.01,0.01) 000.01(0.01,0.01) -0.01 0.014 0.989
NT⁃proBNP[pg/L,M(P25,P75)] 051.85(20.00,84.50) 048.10(20.00,95.90) 0.00 -0.037 1.000
Hb(g/L,x ± s) 140.43 ± 14.56 143.19 ± 15.37 -0.94 0.184 0.352
WBC[×10 /L,M(P25,P75)] 005.88(4.91,6.96) 006.40(4.76,7.80) -0.52 0.108 0.605
9
PLT[×10 /L,M(P25,P75)] 217.50(182.50,272.50) 226.00(190.00,252.00) -0.23 0.007 0.820
9
Glu[mmol/L,M(P25,P75)] 005.42(5.03,5.80) 005.70(4.92,7.04) -1.06 0.547 0.290
Hba1c[%,M(P25,P75)] 005.70(5.55,6.08) 005.85(5.40,6.50) -0.74 0.427 0.457
LDL⁃C[mmol/L,M(P25,P75)] 002.48(1.90,3.25) 002.64(2.03,3.34) -0.48 0.064 0.631
HDL⁃C[mmol/L,M(P25,P75)] 003.62(2.57,4.54) 001.27(1.05,1.64) -7.15 -1.891 <0.001
TC(mmol/L,x ± s) 04.47 ± 0.93 04.34 ± 1.06 0.65 -0.128 0.520
TG[mmol/L,M(P25,P75)] 001.23(0.75,1.60) 001.41(1.11,1.76) -1.33 0.019 0.182
ApoA1(g/L,x ± s) 01.56 ± 0.20 01.55 ± 0.24 0.05 -0.010 0.956
AST[U/L,M(P25,P75)] 020.45(16.33,26.75) 019.00(14.30,27.00) -1.45 0.144 0.147
ALT[U/L,M(P25,P75)] 019.70(15.30,29.87) 020.10(14.70,26.60) -0.54 -0.176 0.590
SCr[μmol/L,M(P25,P75)] 056.60(45.37,67.85) 057.00(49.40,68.00) -0.74 0.214 0.460
UA[mmol/L,M(P25,P75)] 287.00(245.00,338.00) 306.00(267.00,356.00) -1.46 0.225 0.145
D⁃dimer[ng/mL,M(P25,P75)] 340.00(290.00,370.00) 300.00(270.00,350.00) -2.10 0.077 0.036
Tn⁃I:troponin I;NT⁃proBNP;N⁃terminal pro B⁃type natriuretic peptide;Hb:hemoglobin;WBC:white blood cell;PLT:platelet;Glu:glucose;
Hba1c:glycated hemoglobin A1c;LDL⁃C:low⁃density lipoprotein cholesterol;HDL⁃C:high⁃density lipoprotein cholesterol;TC:total cholesterol;TG:tri⁃
glyceride;ApoA1:apolipoprotein A1;AST:aspartate aminotransferase;ALT:alanine aminotransferase;SCr:serum creatinine;UA:uric acid.
表3 CSFP危险因素的单因素Logistic回归分析 表4 多重共线性诊断:全模型逐项VIF与容忍度
Table 3 Univariate logistic regression analysis of risk Table 4 Multicollinearity diagnostics:full model⁃by⁃model
factors for CSFP VIF and tolerance
Characteristic OR(95%CI) P Characteristic VIF Tolerance(1/VIF)
GDF⁃15 a 10.27(3.09-34.11) <0.001 HDL⁃C 1.11 0.902
HDL⁃C 00.19(0.11-0.34) <0.001 GDF⁃15 a 1.12 0.895
BMI 01.16(1.01-1.34) 0.043 Age 1.01 0.994
Univariate logistic regression analysis was used to assess the risk Use of lipid⁃lowering drugs 1.01 0.993
factors,with results presented as odds ratio(OR)and their 95% confi⁃ BMI 1.02 0.977
2
dence interval(95%CI). a:GDF⁃15 was included in the analysis after VIF=1/(1-R ),calculated item by item based on the design matrix
logarithmic transformation. including the intercept. A VIF < 5(tolerance > 0.2)suggests no signifi⁃
cant collinearity. a:GDF⁃15 was included in the analysis after logarith⁃
(cut⁃off)为 908 ng/L,对应的灵敏度 57.97%、特异 mic transformation.
度 90.48%。为降低过拟合风险,对该阈值进行内 模型的诊断效能。结果显示联合模型的 AUC 为
部验证:重复 5 折交叉验证(10 次)显示,各训练折 0.953(95% CI:0.913~0.984),高于单一GDF⁃15指标
中重新选定的阈值中位数为 946.8 ng/L,且有78.0% (图2),表明联合策略极大提升了CSFP的识别能力。
的阈值落在908 ng/L的±10%区间(即817~999 ng/L); 在最佳截断值(预测概率=0.73)下,联合模型的灵敏度
Bootstrap(B=1 000)给出阈值95%分位区间为839.3~ 为 91.30%(95% CI:86.06% ~96.54% ),特 异 度 为
1 138.3 ng/L。上述结果支持908 ng/L在内部重采样 88.10%(95%CI:82.08%~94.12%)。为检验稳健性
下的相对稳定性,但仍需在外部独立队列进一步验 并降低过拟合风险,本研究实施重复 5 折交叉验证
证并视情况再校准。 (10 次)与 Bootstrap 校正:测试 AUC(0.927±0.053),
ROC曲线分析进一步评估了GDF⁃15联合HDL⁃C 校正AUC 0.925,显示AUC存在轻度乐观偏倚,但联

