Different prognostic models for different patient populations: validation of a new prognostic model for patients with oropharyngeal cancer in Western Europe

作者：Rietbergen M M; Witte B I; Velazquez E R; Snijders P J F; Bloemena E; Speel E J; Brakenhoff R H^*; Kremer B; Lambin P; Leemans C R

来源：British Journal of Cancer, 2015, 112(11): 1733-1736.

DOI：10.1038/bjc.2015.139

• human papillomavirus
• oropharyngeal cancer
• prognostic model validation

Objective: The presence of human papillomavirus (HPV) infection in oropharyngeal squamous cell carcinoma (OPSCC) is a major determinant in prognostic risk modelling. Recently, a prognostic model was proposed in which HPV status, comorbidity and nodal stage were the most important prognostic factors to determine high-, intermediate-and low-risk survival groups. Here, we report on the validation of this model using an independent single-institutional cohort.
Methods: A total number of 235 patients curatively treated for OPSCC in the period 2000-2011 at the MUMC (Maastricht University Medical Center, The Netherlands) were included. The presence of an oncogenic HPV infection was determined by p16 immunostaining, followed by a high-risk HPV DNA PCR on the p16-positive cases. The model variables included were HPV status, comorbidity and nodal stage. As a measure of model performance, the Harrell's Concordance index (Harrell's C-index) was used.
Results: The 5-year overall survival (OS) estimates were 84.6%, 54.5% and 28.7% in the low-, intermediate-and high-risk group, respectively. The difference between the survival curves was highly significant (P<0.001). The Harrell's C-index was 0.69 (95% confidence interval (CI): 0.63-0.75).
Conclusion: In this study a previously developed prognostic risk model was validated. This model will help to personalise treatment in OPSCC patients. This model is publicly available at www.predictcancer.org.

• 出版日期2015-5-26