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·848 · 南 京 医 科 大 学 学 报 2025年6月
(续表1)
Characteristic Total(n=230) Training set(n=146) Testing set(n=84) t/Z/χ 2 P
TC[mmol/L,M(P25,P75)] 0 004.2(3.5,5.0) 004.3(3.6,5.0) 0 003.9(3.3,5.0) -1.473 b 0.141
LDL⁃C(mmol/L,x ± s) 002.62 ± 0.79 2.65 ± 0.72 2.56 ± 0.91 -0.718 a 0.474
HDL⁃C[mmol/L,M(P25,P75)] 0 001.1(0.9,1.2) 001.1(0.9,1.2) 0 001.0(0.9,1.2) -0.792 b 0.428
TG[mmol/L,M(P25,P75)] 0 001.2(0.9,1.5) 001.2(0.9,1.5) 0 001.2(0.8,1.6) -0.082 b 0.934
Creatinine[μmol/L,M(P25,P75)] 0 070.5(59.9,85.8) 068.1(59.0,86.0) 0 072.5(61.0,85.7) -0.858 b 0.391
eGFR[mL/(min·1.73 m ),M(P25,P75)]0 075.0(59.9,99.5) 076.4(58.7,103.1) 0 074.5(61.2,93.1) -0.515 b 0.607
2
Hemoglobin[g/L,M(P25,P75)] 0 136.0(123.3,147.0) 138.0(125.0,148.0) 0 134.0(121.5,144.2) -1.625 b 0.104
WBC[×10 /L,M(P25,P75)] 0 009.2(7.1,10.8) 009.2(7.2,10.9) 0 009.1(6.8,10.8) -0.275 b 0.784
9
CRP[mg/L,M(P25,P75)] 0 005.0(5.0,11.1) 005.0(5.0,9.8) 0 005.0(5.0,18.2) -1.155 b 0.248
NT⁃proBNP[pg/mL,M(P25,P75)] 1 026.0(341.6,2 261.7)999.6(341.6,2 240.5)1 059.2(379.1,2 267.7)-0.013 b 0.986
hs⁃cTnT[ng/L,M(P25,P75)] 0 013.7(8.2,24.7) 012.8(7.8,22.1) 0 014.1(9.1,28.0) -1.263 b 0.215
PT[s,M(P25,P75)] 0 011.7(11.2,12.4) 011.7(11.2,12.3) 0 011.8(11.3,12.5) -0.875 b 0.380
INR 0 01.02(0.97,1.08) 01.02(0.97,1.07) 0 01.03(0.98,1.09) -0.872 b 0.384
APTT[s,M(P25,P75)] 0 026.8(25.1,28.1) 026.6(24.8,28.3) 0 026.8(25.4,28.0) -0.353 b 0.719
D⁃dimer[mg/L,M(P25,P75)] 0 00.98(0.41,2.76) 01.15(0.48,3.04) 0 00.76(0.39,2.36) -1.646 b 0.099
Imaging[mL,M(P25,P75)]
Ischemic volume 0 134.7(78.2,191.7) 140.5(76.7,196.0) 0 127.4(82.5,179.5) -0.692 b 0.483
Core infarct volume 0 007.0(0.0,34.7) 009.0(0.0,34.7) 0 003.5(0.0,34.5) -1.204 b 0.227
ASPECTS[n(%)] NA d 0.833
0 0 000.4(1.7) 000.3(2.1) 0 000.1(1.2)
1 0 000.1(0.4) 000.1(0.7) 000.00(0)
2 0 000.7(3.0) 000.5(3.4) 000.02(2.4)
3 0 00.14(6.1) 00.10(6.8) 000.04(4.8)
4 0 00.29(12.6) 00.22(15.1) 000.07(8.3)
5 0 00.28(12.2) 00.16(11.0) 000.12(14.3)
6 0 00.31(13.5) 00.21(14.4) 000.10(11.9)
7 0 00.26(11.3) 00.14(9.6) 000.12(14.3)
8 0 00.40(17.4) 00.25(17.1) 000.15(17.9)
9 0 00.30(13.0) 00.17(11.6) 000.13(15.5)
10 0 00.20(8.7) 00.12(8.2) 000.08(9.5)
a:Continuous variables with a normal distribution were compared using Student’s t⁃test,and the test statistic reported was the t⁃value. b:Continuous
variables with a non⁃normal distribution were compared using the Mann⁃Whitney U test,and the test statistic reported was the Z⁃value. c:Categorical
2
variables were compared using Pearson’s chi⁃square test,and the test statistic reported was the χ ⁃value. d:For categorical variables with expected cell
counts less than 5,Fisher’s exact test was used,and no test statistic was reported. BMI:body mass index;mRS:the modified Rankin scale;SBP:systolic
blood pressure;DBP:diastolic blood pressure;NIHSS:national institutes of health stroke scale;AST:aspartate aminotransferase;ALT:alanine amino⁃
transferase;TC:total cholesterol;LDL⁃C:low⁃density lipoprotein cholesterol;HDL⁃C:high⁃density lipoprotein cholesterol;TG:triglyceride;eGFR:esti⁃
mated glomerular filtration rate;WBC:white blood count;CRP:C⁃reactive protein;NT⁃proBNP:N⁃terminal pro⁃brain natriuretic peptide;hs⁃cTnT:high⁃
sensitivity cardiac troponin T;PT:prothrombin time;INR:international normalized ratio;APTT:activated partial thromboplastin time;ASPECTS:alberta
stroke program early CT score.
性。图2A和2B分别展示训练集和测试集2年全因 2.4 预测模型的应用
死亡风险预测模型的校准曲线。训练集中基础模 NT⁃proBNP 预测 2 年全因死亡风险的 AUC 为
型、模型 1、模型 2 的 Brier 评分分别为 0.153、0.137、 0.743,最佳截断值为 1 158.64 pg/mL(灵敏度 0.750,
0.161;测 试 集 中 Brier 评 分 分 别 为 0.176、0.170、 特异度 0.732)。按 NT⁃proBNP 最佳截断值分组,高
0.173。模型 1 在训练集与测试集中均显示更佳的 NT⁃proBNP 组的死亡风险是低 NT⁃proBNP 组的 4 倍
校准性。 (HR=4.18,95%CI:2.05~8.55,P < 0.001)。图3为基

