Pretreatment Quality of Life as a Predictor of Distant Metastasis-Free Survival and Overall Survival in Patients With Head and Neck Cancer

The importance of patient-related outcomes, especially quality of life (QoL) has been recently emphasized in the field of oncology. In conjunction with traditional biomedical indicators, QoL is recognized as a reliable parameter to reflect the health status of patients with malignancy. A growing body of evidence even points out that QoL can produce prognostic information which goes beyond biomedical indicators. In particular, since QoL may decline before any possible deterioration in health can be detected by existing biomedical measures, assessing pre-treatment QoL possibly helps identify the patients who are susceptible to a higher risk of mortality after they receive cancer treatment, which may greatly facilitate the process of clinical decision making. Despite the importance of pre-treatment QoL, its prognostic associations with overall survival and distant metastasis free survival still remain relatively under-explored.