We further developed an online tool (https://bcrnomapp.shinyapps.io/bcr-risk/) for personalized BCR-risk prediction.<h4>Conclusion</h4>We developed a validated nomogram based on four independent risk factors-the Gleason score, lymph node metastasis, seminal vesicle invasion, and free PSA-for predicting BCR in elderly prostate cancer patients after radical prostatectomy. This evidence concerns the gene KLK3 and prostate cancer.