Variation in treatment recommendations of adjuvant radiation therapy for high-risk prostate cancer by physician specialty

Urology. 2013 Oct;82(4):807-12. doi: 10.1016/j.urology.2013.04.060. Epub 2013 Aug 1.

Abstract

Objective: To assess the treatment recommendations from a nationally representative sample of radiation oncologists and urologists on adjuvant radiotherapy for patients with pathologically advanced prostate cancer after radical prostatectomy.

Methods: From a random sample of 1422 physicians (n = 711 radiation oncologists; n = 711 urologists) in the American Medical Association Masterfile, a mail survey queried treatment recommendations for adjuvant radiotherapy that varied by the following pathologic features: extraprostatic extension (pT3a) vs seminal vesicle invasion (pT3b), Gleason 7 vs Gleason 8-10, and margin negative (MN) vs margin positive (MP). Pearson chi-square and multivariable logistic regression were used to test for differences in treatment recommendations by physician specialty.

Results: Response rates for radiation oncologists and urologists were similar (44% vs 46%; P = .42). Radiation oncologists were more likely to recommend adjuvant radiotherapy than urologists for all the varying pathologic scenarios from pT3a, Gleason 7, and MN (42.5% vs 9.7%; adjusted odds ratio [OR]: 7.82, P <.001) to pT3b, Gleason 8-10, and MP disease (94.5% vs 89.1%, adjusted OR: 2.46, P <.001). Compared with radiation oncologists, urologists were more likely to recommend salvage radiotherapy pT3a, Gleason 7, and MN (90.3% vs 57.7%; adjusted OR: 7.72, P <.001) to pT3b, Gleason 8-10, and MP disease (10.9% vs 5.5%; adjusted OR: 2.22, P <.001).

Conclusion: In this national survey, radiation oncologists and urologists have markedly different treatment recommendations for adjuvant and salvage radiotherapy. Patients with adverse pathologic features after radical prostatectomy should consult with both a urologist and radiation oncologist to hear a diversity of opinions to make the most informed decision possible.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Female
  • Humans
  • Male
  • Middle Aged
  • Practice Guidelines as Topic
  • Practice Patterns, Physicians'*
  • Prostatectomy
  • Prostatic Neoplasms / radiotherapy*
  • Prostatic Neoplasms / surgery
  • Radiation Oncology*
  • Radiotherapy, Adjuvant
  • Risk Factors
  • Urology*