Centaur CP检测前列腺特异性抗原的临床应用研究

目的探讨总前列腺特异性抗原(tPSA)、复合前列腺特异性抗原(cPSA)及cPSA/tPSA比值在前列腺癌(PCa)诊断中的应用价值。方法选取中国人民解放军第一医院确诊的PCa患者73例、前列腺良性增生(BPH)患者76例及健康对照70例。采用西门子化学发光Advia Centaur CP检测各组tPSA、cPSA及c/t比值。结果 PCa组的tPSA、cPSA及c/t比值显著高于BPH组,差异有统计学意义(P0.05);ROC曲线显示tPSA截断值为19.89μg/L,cPSA截断值为13.14μg/L时,区分PCa和BPH的灵敏度分别可达94.5%、95.9%,特异度分别为97.9%、91.8%,曲线下最大面积为0.96、0.98,尤登指数为0.924、0.877;χ2检验显示tPSA、cPSA与病理诊断结果无相关性(χ2分别为102.036、151.409,P0.05)。结论 tPSA、cPSA的水平分别达到19.89μg/L和13.14μg/L时应高度怀疑患者为PCa或PCa治疗后复发,应及时进行治疗。

The clinical study of Centaur CP detection of prostate specific antigen

Objective To explore the diagnostic value of prostate specific antigen (PSA),compound prostate specific antigen(cPSA),and cPSA / tPSA ratio in prostatic cancer(PCa).Methods Two hundred nineteen people,aged 62-68,were divided into three groups according to the clinical diagnosis,including PCa group(n=73),benign prostatic hyperplasia(BPH) group(n=76) and control group(n=70) composed of healthy people.The various indicators,including tPSA,cPSA and cPSA/tPSA were measured by Advia Centaur CP chemiluminescent analyzer.Results tPSA,cPSA and c/t significantly increased in PCa group compared with those in BPH or control group (P<0.05).ROC analysis indicated that if the tPSA cut-off values was19.89 μg/L,the sensitivity,specificity,the area under the curve (AUC) and Youden index would be 94.5%,97.9%,0.96 and 0.924 respectively.If the cut-off value of cPSA was 13.14 μg/L,the sensitivity,specificity,the area under the curve(AUC) and Youden index would be 95.9%,91.8%,0.98 and 0.877 respectively.The chi-square test showed that there is no correlation between tPSA,cPSA and pathology diagnosis(χ2=102.036、151.409,P<0.05).Conclusion PCa or PCa treatment relapse should be highly suspected when the concentration of tPSA or cPSA in patients reached 19.89 μg/L and 13.14 μg/L,the patients should be reminded for treatment timely.