Nomograms provide improved accuracy for predicting survival after radical cystectomy

Shahrokh F. Shariat, Pierre I. Karakiewicz, Ganesh S. Palapattu, Gilad E. Amiel, Yair Lotan, Craig G. Rogers, Amnon Vazina, Patrick J. Bastian, Amit Gupta, Arthur I. Sagalowsky, Mark Schoenberg, Seth P. Lerner

Research output: Contribution to journalArticle

Abstract

Aims: To develop multivariate nomograms that determine the probabilities of all-cause and bladder cancer - specific survival after radical cystectomy and to compare their predictive accuracy to that of American Joint Committee on Cancer (AJCC) staging. Methods: We used Cox proportional hazards regression analyses to model variables of 731 consecutive patients treated with radical cystectomy and bilateral pelvic lymphadenectomy for bladder transitional cell carcinoma. Variables included age of patient, gender, pathologic stage (pT), pathologic grade, carcinoma in situ, lymphovascular invasion (LVI), lymph node status (pN), neoadjuvant chemotherapy (NACH), adjuvant chemotherapy (ACH), and adjuvant external beam radiotherapy (AXRT). Two hundred bootstrap resamples were used to reduce overfit bias and for internal validation. Results: During a mean follow-up of 36.4 months, 290 of 731 (39.7%) patients died; 106 of 290 patients (67.6%) died of bladder cancer. Actuarial all-cause survival estimates were 56.3% [95% confidence interval (95% CI), 51.8-60.6%] and 42.9% (95% CI, 37.3-48.4%) at 5 and 8 years after cystectomy, respectively. Actuarial cancer-specific survival estimates were 87.3% (62.9-71.3%) and 58.7% (52.7-64.2%) at 5 and 8 years, respectively. The accuracy of a nomogram for prediction of all-cause survival (0.732) that included patient age, pT, pN, LVI, NACH, ACH, and AXRT was significantly superior (P = 0.001) to that of AJCC staging - based risk grouping (0.615). Similarly, the accuracy of a nomogram for prediction of cancer-specific survival that included pT, pN, LVI, NACH, and AXRT (0.791) was significantly superior (P = 0.001) to that of AJCC staging - based risk grouping (0.663). Conclusions: Multivariate nomograms provide a more accurate and relevant individualized prediction of survival after cystectomy compared with conventional prediction models, thereby allowing for improved patient counseling and treatment selection.

Original languageEnglish (US)
Pages (from-to)6663-6676
Number of pages14
JournalClinical Cancer Research
Volume12
Issue number22
DOIs
StatePublished - Nov 15 2006

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ASJC Scopus subject areas

  • Oncology
  • Cancer Research

Cite this

Shariat, S. F., Karakiewicz, P. I., Palapattu, G. S., Amiel, G. E., Lotan, Y., Rogers, C. G., Vazina, A., Bastian, P. J., Gupta, A., Sagalowsky, A. I., Schoenberg, M., & Lerner, S. P. (2006). Nomograms provide improved accuracy for predicting survival after radical cystectomy. Clinical Cancer Research, 12(22), 6663-6676. https://doi.org/10.1158/1078-0432.CCR-06-0372