Background and objectives: The number of patients diagnosed with head and neck squamous cell carcinoma (HNSCC) at an advanced age has increased. The aim of this study is to evaluate the age at which disease-specific survival (DSS) significantly decreases in HNSCC.
Methods: We performed a retrospective study of 5469 patients with HNSCC treated at our center (1985-2016). External validation with 2082 oral squamous cell carcinomas from a collaborative institution from another continent was performed.
Results: We observed an orderly decrease in overall survival as age at diagnosis increased. There were no differences in DSS based on age for patients <80 years old (P = .623), while older patients had a significant decrease in DSS. These results were validated in the independent dataset. In a multivariable analysis performed in the test set, compared to patients <80 years old, patients between 80 to 85 had a 1.50 times higher risk of disease-specific death (95% confidence interval [CI]: 1.19-1.89; P = .001), and patients >85 had a 2.19 times higher risk (95% CI: 1.68-2.87; P < .001).
Conclusions: DSS started to significantly decrease in HNSCC at 80 years old. These findings, validated in an independent cohort, indicate that chronological age on its own should not withhold curative treatment in the majority of patients with HNSCC.
Keywords: cancer-specific survival; elderly; head and neck neoplasms; oral cavity neoplasms.
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