Abstract
Purpose
The main objective of this study was to evaluate the cumulative incidence of cause-specific death and other causes of death for patients with head and neck adenoid cystic carcinoma (ACC). The secondary aim was to model the probability of cause-specific death and build a competing risk nomogram to predict cause-specific mortality for this disease.
Methods
Data were extracted from the US National Cancer Institute’s Surveillance Epidemiology, and End Results (SEER)-18 dataset. The study cohort included patients with a diagnosis of primary head and neck ACC during the period 2004–2013. We calculated the cumulative incidence function (CIF) for cause-specific death and other causes of death, and constructed the Fine and Gray’s proportional subdistribution hazard model, as well as a competing-risk nomogram based on Fine and Gray’s model, to predict the probability of cause-specific death for patients with head and neck ACC.
Results
After data selection, 1435 cases were included for analysis. Five-year cumulative incidence of cause-specific death was 17.4% (95% confidence interval [CI] 15.1–19.8%) and cumulative incidence of other causes of death was 5.8% (95% CI 4.4–7.4%). Predictors of cause-specific death for head and neck ACC included age, tumor size, advanced T stage, positive lymph node, distant metastasis, and surgery. The nomogram was well-calibrated, and had good discriminative ability.
Conclusion
The large sample allowed us to construct a reliable predictive model for rare malignancy. The model performance was good, with a concordance index of 0.79, and the nomogram can provide useful individualized predictive information for patients with head and neck ACC.
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Acknowledgement
The authors would like to thank the NCI for open access to their SEER database. The opinions or views expressed in this paper are those of the authors and do not represent the opinions or recommendations of the NCI.
Disclosure
Weidong Shen, Naoko Sakamoto, and Limin Yang have no potential conflicts of interest.
Funding
No Grant funding was received for this study.
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Shen, W., Sakamoto, N. & Yang, L. Model to Predict Cause-Specific Mortality in Patients with Head and Neck Adenoid Cystic Carcinoma: A Competing Risk Analysis. Ann Surg Oncol 24, 2129–2136 (2017). https://doi.org/10.1245/s10434-017-5861-z
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DOI: https://doi.org/10.1245/s10434-017-5861-z