Thursday, March 4, 2021

A cause‐specific Cox model for second primary tumors in patients with head and neck cancer: A RONCDOC study

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Abstract

Background

The aim of this study was to identify risk factors for the development of second primary tumors (SPTs) in the head and neck region, lungs, and esophagus in patients with head and neck cancer.

Methods

We collected data from 1581 patients. A cause‐specific Cox model for the development of an SPT was fitted, accounting for the competing risks residual/recurrent tumor and mortality.

Results

Of all patients, 246 (15.6%) developed SPTs. Analysis showed that tobacco and alcohol use, comorbidity, and the oral cavity subsite were risk factors for SPTs. The C‐index, the discriminative accuracy, of the model for SPT was 0.65 (95% confidence interval, 0.61–0.68).

Conclusions

Our results show that there is potential to identify patients who have an increased risk to develop an SPT. This might increase their survival chances and quality of life. More research is needed to provide head and neck clinicians with definitive recommendations.

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