Background: The aim of this article was to develop prediction models that calculate postoperative 2- and 5-year mortality probabilities of patients with squamous cell carcinoma of the maxilla (MSCC).
Methods: Data were collected from the medical records of patients who had been operated between 2000 and 2015 for MSCC. Potential clinical and histopathological predictors were identified. Confounding-(un)adjusted multivariate Cox and logistic regression models were computed with stepwise backward selection. Internal validation was performed to assess calibration and discriminatory ability.
Results: Ninety-five patients with MSCC were included. Two-year follow-up was complete, and 85 patients had 5-year follow-up. Age, neck treatment, surgical margins, bone invasion, spindle growth, and vasoinvasive growth were associated with mortality. Models were adjusted for confounding with Charlson's comorbidities index. C-indexes were .841 and .770 respectively, and .838 and .749 after bootstrapping.
Conclusion: The MSCC-specific mortality probability can be calculated with new prediction models.
Keywords: head and neck cancer; maxillary squamous cell carcinoma; mortality; oral cancer; prediction model; prognosis; webcalculator.
© 2019 Wiley Periodicals, Inc.