Abstract:Objective To investigate the serum prostate-specific antigen (PSA),prostate specific antigen density(PSAD) and soluble epithelial cadherin (sE-cad) in the diagnosis of prostate cancer.Methods A total of 300 prostate cancer patients admitted to Jianli Hospital of Traditional Chinese Medicine from April 2020 to April 2021 were selected as the research group,and 280 healthy male from Jianli Hospital of Traditional Chinese Medicine during the same period were selected as the control group.Serum Levels of PSA,PSAD and sE-cad were compared between the two groups.The sensitivity,specificity,positive predictive value,negative predictive value and accuracy of serum PSA,PSAD and sE-cad single and combined detection were analyzed by receiver operating characteristic (ROC) curve.Results The levels of serum PSA,PSAD and sE-cad in the study group were higher than those in the control group,and the differences were statistically significant (P<0.05).The sensitivity,specificity and accuracy of PSA in the diagnosis of prostate cancer were 80.00%,90.00% and 84.43%.The sensitivity,specificity and accuracy of PSAD in the diagnosis of prostate cancer were 83.33%,92.86% and 87.93%.The sensitivity,specificity and accuracy of sE-cad were 66.67%,71.42% and 68.97%.The sensitivity,specificity and accuracy of combined detection were 96.67%,98.21%and 97.41%.The diagnostic value of combined detection was higher than that of single detection,and the difference was statistically significant (P<0.05).ROC curve results showed that the areas under curve of serum PSA,PSAD and sE-cad single and combined detection were 86.2,87.6,68.2 and 96.8 respectively,95%CI were 0.829-0.894,0.845-0.907,0.638-0.727 and 0.957-0.980,respectively.The diagnostic efficacy of serum PSA,PSAD and sE-cad combined detection was higher than that of single detection,and the difference was statistically significant (P<0.05).Conclusion The levels of serum PSA,PSAD and sE-cad in patients with prostate cancer are significantly increased.The combined detection of prostate cancer has high diagnostic value and is worthy of clinical application.