Penile cancer (PC) is a great impact on the quality of life and psychological status of patients. This study aimed to construct nomograms using data from the Surveillance, Epidemiology, and End Results (SEER) database to predict overall survival (OS) and cancer-specific survival (CSS) in patients with penile cancer (PC).
Patients were divided into a training cohort (n = 634) and a validation cohort (n = 272) in a 7:3 ratio. Independent risk factors influencing the prognosis of PC were screened using univariate and multivariate Cox analyses, and models for predicting PC were developed. Data from 203 patients with PC in four tertiary hospitals in Gansu Province from 2012 to 2021 were externally validated.
Univariate analysis and multivariate analysis showed revealed that the OS-related factors were age, grade, T stage, N stage, M stage and tumor size (p < 0.05); the CSS-related factors were age, mode of surgery, T stage, N stage, M stage and tumor size (p < 0.05). The C-indices of the OS and CSS nomograms in the training cohort were 0.743 [95% confidence interval (CI) (0.714-0.772)] and 0.797 (0.762-0.832), respectively. The C-indices of the OS and CSS nomograms in the internal validation cohort were 0.735 (0.686-0.784) and 0.755 (0.688-0.822), respectively, and those in the external validation cohort were 0.801 (0.746-0.856) and 0.863 (0.812-0.914), respectively. Receiver operating characteristic (ROC) curves, calibration curves, and survival curves all demonstrated good predictive performance of the nomograms.
The nomograms for PC were developed using the SEER database. The accuracy and clinical usefulness of the model were validated through a combination of internal and external validations.
Journal of cancer research and clinical oncology. 2023 Jul 31 [Epub ahead of print]
Shujun Yang, Wei Chang, Bin Zhang, Qian Hou, Biao Zhang, Yindong Kang, Yongsheng Yin, Jianghou Wan, Panfeng Shang
Department of Urology, Lanzhou University Second Hospital, Chengguan District, Lanzhou, 730030, Gansu, China., Department of Urology, The 940th Hospital of Joint Logistics Support Force of People's Liberation Army, Lanzhou, Gansu, China., Department of Urology, Gansu Provincial People's Hospital, Lanzhou, Gansu, China., Department of Urology, First Hospital of Lanzhou University, Lanzhou, Gansu, China., Department of Urology, Lanzhou University Second Hospital, Chengguan District, Lanzhou, 730030, Gansu, China. .