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Risk factors for competing non-cancer mortality after definitive treatment for advanced-stage head and neck cancer
Yong Han Kim1, Jong-Lyel Roh1, Sung-Bae Kim2
1Department of Otolaryngology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
Objective:
Patients with head and neck cancer (HNC) can die of index tumor progression and second tumor or non-cancer causes. Here, we investigated the risk factors for competing non-cancer mortality (NCM) in a prospective cohort of patients with advanced-stage HNC.
Materials And Methods:
A prospective observational study was conducted with 604 patients who underwent definitive treatment for advanced-stage HNC between 2010 and 2015. Main outcomes were NCM and cancer mortality (CM) defined as death from non-cancer causes and HNC or second cancers, respectively. Cumulative incidence and cause-specific hazard functions were used to analyze the risk factors of NCM and CM.
Results:
Age, smoking, Charlson comorbidity index (CCI), performance status, body mass index, rural residence, education and hemoglobin level at diagnosis, and chemotherapy were significantly associated with NCM (all p < 0.05). Multivariate analyses showed that age, CCI, and hemoglobin were independent factors of NCM. Age (≥65 years), CCI (≥2), and hemoglobin (<11 g/dl) were related to 4.5-, 3.2-, and 2.7-fold increased adjusted risk of NCM, respectively.
Conclusions:
Old age, comorbidity, and hemoglobin at diagnosis were independent predictors of NCM. The risk factors could be used to predict non-cancer death after definitive treatment for advanced-stage HNC.
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