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What is the predictive value of OroGrams to estimate survival rates of HPV-positive oropharyngeal squamous cell carcinoma?

Evidence-Based Dentistry volume 23, pages 14–15 (2022)Cite this article

Abstract

Design Retrospective cohort study.

Cohort selection OroGrams is a nomogram designed to better predict survival patterns in patients with oropharyngeal squamous cell carcinoma (OPSCC) by incorporation of both HPV-DNA and p16 status. The aim of this study was to evaluate the external validity of OroGrams in a Scottish population. The study population was noted to have a higher smoking status than the four European cohorts among which Orograms was originally developed and established.

Data analysis Retrospective analysis was undertaken of health records and death certificates of patients with OPSCC in Glasgow, Scotland between 2012 and 2017. Required baseline characteristics were compared to the original study cohorts to assess comparability. OroGrams was implemented to produce Kaplan Meier curves for overall and progression-free survival at one, three and five years. Brier scores were produced to compare these to the actual observed outcomes.

Results Compared to the UK study group, significantly more of the Scottish cohort presented at a later stage (p <0.001), were smokers (p = 0.002), and were both HPV-DNA and p16-negative. More patients received surgery or radiotherapy alone and less received a combination of both with chemotherapy. Low Brier scores indicated good predictive ability of OroGrams in the Scottish group at one, three and five years that was most accurate for overall survival. This accuracy was similar to the UK cohort at one and three years, but less so at five-year follow-up. Outcome predictions were significantly better for HPV-positive versus negative cases at all time points.

Conclusions OroGrams showed good prognostic accuracy for this Scottish cohort with significantly higher smoking, and HPV-DNA and p16-negative status, compared to the original UK study population. There were, however, limitations at longer follow-up periods and individual variation which limits its clinical application. Incorporation and weighting of smoking status and other comorbidities in future nomograms is recommended to enhance outcome understanding and better inform treatment planning.

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Authors and Affiliations

  1. Royal Cornwall Hospitals NHS Trust, Treliske, Truro, Cornwall, TR1 3LJ, UK

    James Robbins

  2. Qatar University, College of Dental Medicine, QU Health, Doha 2713, Qatar

    Kamran Ali

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  1. James Robbins
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  2. Kamran Ali
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Robbins, J., Ali, K. What is the predictive value of OroGrams to estimate survival rates of HPV-positive oropharyngeal squamous cell carcinoma?. Evid Based Dent 23, 14–15 (2022). https://doi.org/10.1038/s41432-022-0242-2

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  • DOI: https://doi.org/10.1038/s41432-022-0242-2

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